Mercurial > repos > blastem
annotate vdp.c @ 191:1b4d856b067a
Fixes for direct color dma stuff
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 14 Jan 2013 20:23:17 -0800 |
| parents | 4cb8a3891e26 |
| children | d3266cee02c9 |
| rev | line source |
|---|---|
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1 #include "vdp.h" |
| 75 | 2 #include "blastem.h" |
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3 #include <stdlib.h> |
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4 #include <string.h> |
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5 |
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6 #define NTSC_ACTIVE 225 |
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7 #define PAL_ACTIVE 241 |
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8 #define BUF_BIT_PRIORITY 0x40 |
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9 #define MAP_BIT_PRIORITY 0x8000 |
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10 #define MAP_BIT_H_FLIP 0x800 |
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11 #define MAP_BIT_V_FLIP 0x1000 |
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12 |
| 75 | 13 #define BIT_PAL 0x8 |
| 14 #define BIT_DMA_ENABLE 0x4 | |
| 15 #define BIT_H40 0x1 | |
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16 |
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17 #define SCROLL_BUFFER_SIZE 32 |
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18 #define SCROLL_BUFFER_DRAW 16 |
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19 |
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20 #define FIFO_SIZE 4 |
| 40 | 21 |
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22 void init_vdp_context(vdp_context * context) |
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23 { |
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24 memset(context, 0, sizeof(*context)); |
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25 context->vdpmem = malloc(VRAM_SIZE); |
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26 memset(context->vdpmem, 0, VRAM_SIZE); |
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27 context->framebuf = malloc(FRAMEBUF_SIZE); |
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28 memset(context->framebuf, 0, FRAMEBUF_SIZE); |
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29 context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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30 memset(context->linebuf, 0, LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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31 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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32 context->tmp_buf_b = context->tmp_buf_a + SCROLL_BUFFER_SIZE; |
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33 context->sprite_draws = MAX_DRAWS; |
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34 context->fifo_cur = malloc(sizeof(fifo_entry) * FIFO_SIZE); |
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35 context->fifo_end = context->fifo_cur + FIFO_SIZE; |
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36 } |
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37 |
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38 void render_sprite_cells(vdp_context * context) |
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39 { |
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40 if (context->cur_slot >= context->sprite_draws) { |
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41 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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42 |
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43 uint16_t dir; |
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44 int16_t x; |
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45 if (d->h_flip) { |
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46 x = d->x_pos + 7; |
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47 dir = -1; |
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48 } else { |
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49 x = d->x_pos; |
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50 dir = 1; |
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51 } |
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52 //printf("Draw Slot %d of %d, Rendering sprite cell from %X to x: %d\n", context->cur_slot, context->sprite_draws, d->address, x); |
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53 context->cur_slot--; |
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54 for (uint16_t address = d->address; address != ((d->address+4) & 0xFFFF); address++) { |
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55 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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56 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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57 } |
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58 x += dir; |
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59 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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60 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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61 } |
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62 x += dir; |
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63 } |
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64 } |
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65 } |
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66 |
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67 void scan_sprite_table(uint32_t line, vdp_context * context) |
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68 { |
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69 if (context->sprite_index && context->slot_counter) { |
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70 line += 1; |
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71 line &= 0xFF; |
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72 context->sprite_index &= 0x7F; |
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73 if (context->latched_mode & BIT_H40) { |
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74 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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75 context->sprite_index = 0; |
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76 return; |
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77 } |
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78 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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79 context->sprite_index = 0; |
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80 return; |
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81 } |
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82 //TODO: Read from SAT cache rather than from VRAM |
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83 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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84 uint16_t address = context->sprite_index * 8 + sat_address; |
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85 line += 128; |
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86 uint16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]); |
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87 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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88 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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89 if (y <= line && line < (y + height)) { |
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90 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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91 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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92 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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93 context->sprite_info_list[context->slot_counter].y = y-128; |
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94 } |
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95 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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96 if (context->sprite_index && context->slot_counter) |
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97 { |
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98 address = context->sprite_index * 8 + sat_address; |
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99 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]); |
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100 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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101 if (y <= line && line < (y + height)) { |
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102 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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103 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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104 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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105 context->sprite_info_list[context->slot_counter].y = y-128; |
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106 } |
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107 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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108 } |
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109 } |
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110 } |
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111 |
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112 void read_sprite_x(uint32_t line, vdp_context * context) |
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113 { |
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114 if (context->cur_slot >= context->slot_counter) { |
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115 if (context->sprite_draws) { |
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116 line += 1; |
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117 line &= 0xFF; |
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118 //in tiles |
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119 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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120 //in pixels |
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121 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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122 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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123 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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124 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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125 uint8_t row; |
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126 if (tileinfo & MAP_BIT_V_FLIP) { |
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127 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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128 } else { |
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129 row = line-context->sprite_info_list[context->cur_slot].y; |
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130 } |
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131 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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132 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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133 if (x) { |
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134 context->flags |= FLAG_CAN_MASK; |
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135 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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136 context->flags |= FLAG_MASKED; |
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137 } |
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138 |
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139 context->flags &= ~FLAG_DOT_OFLOW; |
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140 int16_t i; |
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141 if (context->flags & FLAG_MASKED) { |
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142 for (i=0; i < width && context->sprite_draws; i++) { |
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143 --context->sprite_draws; |
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144 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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145 } |
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146 } else { |
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147 x -= 128; |
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148 int16_t base_x = x; |
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149 int16_t dir; |
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150 if (tileinfo & MAP_BIT_H_FLIP) { |
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151 x += (width-1) * 8; |
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152 dir = -8; |
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153 } else { |
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154 dir = 8; |
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155 } |
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156 //printf("Sprite %d | x: %d, y: %d, width: %d, height: %d, pal_priority: %X, row: %d, tile addr: %X\n", context->sprite_info_list[context->cur_slot].index, x, context->sprite_info_list[context->cur_slot].y, width, height, pal_priority, row, address); |
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157 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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158 --context->sprite_draws; |
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159 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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160 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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161 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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162 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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163 } |
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164 } |
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165 if (i < width) { |
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166 context->flags |= FLAG_DOT_OFLOW; |
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167 } |
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168 context->cur_slot--; |
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169 } else { |
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170 context->flags |= FLAG_DOT_OFLOW; |
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171 } |
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172 } |
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173 } |
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174 |
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175 #define VRAM_READ 0 |
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176 #define VRAM_WRITE 1 |
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177 #define CRAM_READ 8 |
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178 #define CRAM_WRITE 3 |
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179 #define VSRAM_READ 4 |
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180 #define VSRAM_WRITE 5 |
| 75 | 181 #define DMA_START 0x20 |
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182 |
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183 void external_slot(vdp_context * context) |
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184 { |
| 75 | 185 //TODO: Figure out what happens if CD bit 4 is not set in DMA copy mode |
| 186 //TODO: Figure out what happens when CD:0-3 is not set to a write mode in DMA operations | |
| 187 //TODO: Figure out what happens if DMA gets disabled part way through a DMA fill or DMA copy | |
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188 if(context->flags & FLAG_DMA_RUN) { |
| 75 | 189 uint16_t dma_len; |
| 190 switch(context->regs[REG_DMASRC_H] & 0xC0) | |
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191 { |
| 75 | 192 //68K -> VDP |
| 193 case 0: | |
| 194 case 0x40: | |
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195 switch(context->dma_cd & 0xF) |
| 75 | 196 { |
| 197 case VRAM_WRITE: | |
| 198 if (context->flags & FLAG_DMA_PROG) { | |
| 199 context->vdpmem[context->address ^ 1] = context->dma_val; | |
| 200 context->flags &= ~FLAG_DMA_PROG; | |
| 201 } else { | |
| 202 context->dma_val = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
| 203 context->vdpmem[context->address] = context->dma_val >> 8; | |
| 204 context->flags |= FLAG_DMA_PROG; | |
| 205 } | |
| 206 break; | |
| 207 case CRAM_WRITE: | |
| 208 context->cram[(context->address/2) & (CRAM_SIZE-1)] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
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209 //printf("CRAM DMA | %X set to %X from %X at %d\n", (context->address/2) & (CRAM_SIZE-1), context->cram[(context->address/2) & (CRAM_SIZE-1)], (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->cycles); |
| 75 | 210 break; |
| 211 case VSRAM_WRITE: | |
| 212 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 213 context->vsram[(context->address/2) & 63] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
| 214 } | |
| 215 break; | |
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216 } |
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217 break; |
| 75 | 218 //Fill |
| 219 case 0x80: | |
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220 switch(context->dma_cd & 0xF) |
| 75 | 221 { |
| 222 case VRAM_WRITE: | |
| 223 //Charles MacDonald's VDP doc says that the low byte gets written first | |
| 142 | 224 context->vdpmem[context->address] = context->dma_val; |
| 225 context->dma_val = (context->dma_val << 8) | ((context->dma_val >> 8) & 0xFF); | |
| 75 | 226 break; |
| 227 case CRAM_WRITE: | |
| 228 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 229 break; | |
| 230 case VSRAM_WRITE: | |
| 231 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 232 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 233 } | |
| 234 break; | |
| 235 } | |
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236 break; |
| 75 | 237 //Copy |
| 238 case 0xC0: | |
| 239 if (context->flags & FLAG_DMA_PROG) { | |
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240 switch(context->dma_cd & 0xF) |
| 75 | 241 { |
| 242 case VRAM_WRITE: | |
| 243 context->vdpmem[context->address] = context->dma_val; | |
| 244 break; | |
| 245 case CRAM_WRITE: | |
| 246 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 247 break; | |
| 248 case VSRAM_WRITE: | |
| 249 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 250 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 251 } | |
| 252 break; | |
| 253 } | |
| 254 context->flags &= ~FLAG_DMA_PROG; | |
| 255 } else { | |
| 256 //I assume, that DMA copy copies from the same RAM as the destination | |
| 257 //but it's possible I'm mistaken | |
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258 switch(context->dma_cd & 0xF) |
| 75 | 259 { |
| 260 case VRAM_WRITE: | |
| 261 context->dma_val = context->vdpmem[(context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]]; | |
| 262 break; | |
| 263 case CRAM_WRITE: | |
| 264 context->dma_val = context->cram[context->regs[REG_DMASRC_L] & (CRAM_SIZE-1)]; | |
| 265 break; | |
| 266 case VSRAM_WRITE: | |
| 267 if ((context->regs[REG_DMASRC_L] & 63) < VSRAM_SIZE) { | |
| 268 context->dma_val = context->vsram[context->regs[REG_DMASRC_L] & 63]; | |
| 269 } else { | |
| 270 context->dma_val = 0; | |
| 271 } | |
| 272 break; | |
| 273 } | |
| 274 context->flags |= FLAG_DMA_PROG; | |
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275 } |
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276 break; |
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277 } |
| 75 | 278 if (!(context->flags & FLAG_DMA_PROG)) { |
| 279 context->address += context->regs[REG_AUTOINC]; | |
| 280 context->regs[REG_DMASRC_L] += 1; | |
| 135 | 281 if (!context->regs[REG_DMASRC_L]) { |
| 282 context->regs[REG_DMASRC_M] += 1; | |
| 283 } | |
| 75 | 284 dma_len = ((context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]) - 1; |
| 285 context->regs[REG_DMALEN_H] = dma_len >> 8; | |
| 286 context->regs[REG_DMALEN_L] = dma_len; | |
| 287 if (!dma_len) { | |
| 288 context->flags &= ~FLAG_DMA_RUN; | |
| 289 } | |
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290 } |
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291 } else { |
| 75 | 292 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
| 293 if (context->fifo_cur != start && start->cycle <= context->cycles) { | |
| 294 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->cd & DMA_START)) { | |
| 295 context->flags |= FLAG_DMA_RUN; | |
| 296 context->dma_val = start->value; | |
| 138 | 297 context->address = start->address; //undo auto-increment |
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298 context->dma_cd = context->cd; |
| 75 | 299 } else { |
| 138 | 300 switch (start->cd & 0xF) |
| 75 | 301 { |
| 302 case VRAM_WRITE: | |
| 303 if (start->partial) { | |
| 304 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); | |
| 138 | 305 context->vdpmem[start->address ^ 1] = start->value; |
| 75 | 306 } else { |
| 307 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); | |
| 138 | 308 context->vdpmem[start->address] = start->value >> 8; |
| 75 | 309 start->partial = 1; |
| 310 //skip auto-increment and removal of entry from fifo | |
| 311 return; | |
| 312 } | |
| 313 break; | |
| 314 case CRAM_WRITE: | |
|
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315 //printf("CRAM Write | %X to %X\n", start->value, (start->address/2) & (CRAM_SIZE-1)); |
| 138 | 316 context->cram[(start->address/2) & (CRAM_SIZE-1)] = start->value; |
| 75 | 317 break; |
| 318 case VSRAM_WRITE: | |
| 138 | 319 if (((start->address/2) & 63) < VSRAM_SIZE) { |
| 75 | 320 //printf("VSRAM Write: %X to %X\n", start->value, context->address); |
| 138 | 321 context->vsram[(start->address/2) & 63] = start->value; |
| 75 | 322 } |
| 323 break; | |
| 324 } | |
| 138 | 325 //context->address += context->regs[REG_AUTOINC]; |
| 75 | 326 } |
| 327 fifo_entry * cur = start+1; | |
| 328 if (cur < context->fifo_cur) { | |
| 329 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); | |
| 330 } | |
| 331 context->fifo_cur -= 1; | |
| 332 } else { | |
| 333 context->flags |= FLAG_UNUSED_SLOT; | |
| 334 } | |
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335 } |
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336 } |
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337 |
| 40 | 338 #define WINDOW_RIGHT 0x80 |
| 339 #define WINDOW_DOWN 0x80 | |
| 340 | |
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341 void read_map_scroll(uint16_t column, uint16_t vsram_off, uint32_t line, uint16_t address, uint16_t hscroll_val, vdp_context * context) |
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342 { |
| 40 | 343 if (!vsram_off) { |
| 344 uint16_t left_col, right_col; | |
| 345 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
|
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346 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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347 right_col = 42; |
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348 } else { |
| 40 | 349 left_col = 0; |
| 350 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
| 351 if (right_col) { | |
| 352 right_col += 2; | |
| 353 } | |
| 354 } | |
|
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355 uint16_t top_line, bottom_line; |
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356 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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357 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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358 bottom_line = 241; |
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359 } else { |
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360 top_line = 0; |
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361 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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362 } |
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363 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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364 uint16_t address = context->regs[REG_WINDOW] << 10; |
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365 uint16_t line_offset, offset, mask; |
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366 if (context->latched_mode & BIT_H40) { |
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367 address &= 0xF000; |
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368 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
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369 mask = 0x7F; |
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370 |
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371 } else { |
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372 address &= 0xF800; |
|
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373 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
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374 mask = 0x3F; |
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375 } |
|
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376 offset = address + line_offset + (((column - 2) * 2) & mask); |
|
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377 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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378 //printf("Window | top: %d, bot: %d, left: %d, right: %d, base: %X, line: %X offset: %X, tile: %X, reg: %X\n", top_line, bottom_line, left_col, right_col, address, line_offset, offset, ((context->col_1 & 0x3FF) << 5), context->regs[REG_WINDOW]); |
|
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379 offset = address + line_offset + (((column - 1) * 2) & mask); |
|
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380 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
|
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381 context->v_offset = (line) & 0x7; |
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382 context->flags |= FLAG_WINDOW; |
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383 return; |
| 40 | 384 } |
| 385 context->flags &= ~FLAG_WINDOW; | |
| 386 } | |
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387 uint16_t vscroll; |
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388 switch(context->regs[REG_SCROLL] & 0x30) |
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389 { |
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390 case 0: |
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391 vscroll = 0xFF; |
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392 break; |
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393 case 0x10: |
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394 vscroll = 0x1FF; |
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395 break; |
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396 case 0x20: |
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397 //TODO: Verify this behavior |
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398 vscroll = 0; |
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399 break; |
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400 case 0x30: |
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401 vscroll = 0x3FF; |
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402 break; |
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403 } |
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404 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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405 context->v_offset = vscroll & 0x7; |
|
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406 //printf("%s | line %d, vsram: %d, vscroll: %d, v_offset: %d\n",(vsram_off ? "B" : "A"), line, context->vsram[context->regs[REG_MODE_3] & 0x4 ? column : 0], vscroll, context->v_offset); |
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407 vscroll /= 8; |
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408 uint16_t hscroll_mask; |
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409 uint16_t v_mul; |
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410 switch(context->regs[REG_SCROLL] & 0x3) |
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411 { |
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412 case 0: |
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413 hscroll_mask = 0x1F; |
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414 v_mul = 64; |
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415 break; |
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416 case 0x1: |
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417 hscroll_mask = 0x3F; |
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418 v_mul = 128; |
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419 break; |
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420 case 0x2: |
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421 //TODO: Verify this behavior |
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422 hscroll_mask = 0; |
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423 v_mul = 0; |
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424 break; |
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425 case 0x3: |
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426 hscroll_mask = 0x7F; |
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427 v_mul = 256; |
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428 break; |
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429 } |
| 28 | 430 uint16_t hscroll, offset; |
| 431 for (int i = 0; i < 2; i++) { | |
|
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432 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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433 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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434 //printf("%s | line: %d, col: %d, x: %d, hs_mask %X, scr reg: %X, tbl addr: %X\n", (vsram_off ? "B" : "A"), line, (column-2+i), hscroll, hscroll_mask, context->regs[REG_SCROLL], offset); |
| 28 | 435 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
| 436 if (i) { | |
| 437 context->col_2 = col_val; | |
| 438 } else { | |
| 439 context->col_1 = col_val; | |
| 440 } | |
| 441 } | |
|
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442 } |
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443 |
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444 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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445 { |
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446 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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447 } |
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448 |
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449 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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450 { |
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451 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
|
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452 } |
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453 |
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454 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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455 { |
|
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Fix bug in tile address masking. Remove some debug code from window plane.
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456 uint16_t address = ((col & 0x7FF) << 5); |
|
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457 if (col & MAP_BIT_V_FLIP) { |
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458 address += 28 - 4 * context->v_offset; |
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459 } else { |
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460 address += 4 * context->v_offset; |
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461 } |
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462 uint16_t pal_priority = (col >> 9) & 0x70; |
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463 int32_t dir; |
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464 if (col & MAP_BIT_H_FLIP) { |
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465 tmp_buf += 7; |
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466 dir = -1; |
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467 } else { |
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468 dir = 1; |
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469 } |
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470 for (uint32_t i=0; i < 4; i++, address++) |
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471 { |
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472 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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473 tmp_buf += dir; |
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474 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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475 tmp_buf += dir; |
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476 } |
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477 } |
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478 |
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479 void render_map_1(vdp_context * context) |
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480 { |
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481 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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482 } |
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483 |
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484 void render_map_2(vdp_context * context) |
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485 { |
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486 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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487 } |
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488 |
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489 void render_map_3(vdp_context * context) |
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490 { |
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491 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
|
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492 } |
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493 |
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494 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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495 { |
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496 if (line >= 240) { |
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497 return; |
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498 } |
|
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|
499 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
|
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500 uint16_t *dst, *end; |
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501 uint8_t *sprite_buf, *plane_a, *plane_b; |
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502 if (col) |
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|
503 { |
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|
504 col-=2; |
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505 dst = context->framebuf + line * 320 + col * 8; |
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|
506 sprite_buf = context->linebuf + col * 8; |
|
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diff
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|
507 uint16_t a_src; |
| 40 | 508 if (context->flags & FLAG_WINDOW) { |
| 509 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
|
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42
diff
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|
510 a_src = FBUF_SRC_W; |
| 40 | 511 } else { |
| 512 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
|
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|
513 a_src = FBUF_SRC_A; |
| 40 | 514 } |
|
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38
diff
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|
515 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
| 30 | 516 end = dst + 16; |
|
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|
517 uint16_t src; |
| 30 | 518 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
|
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|
519 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
|
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diff
changeset
|
520 uint8_t pixel; |
|
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20
diff
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|
521 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
|
20
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|
522 pixel = *sprite_buf; |
|
43
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42
diff
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|
523 src = FBUF_SRC_S; |
|
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20
diff
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|
524 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
|
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diff
changeset
|
525 pixel = *plane_a; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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42
diff
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|
526 src = a_src; |
|
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20
diff
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|
527 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
|
20
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parents:
diff
changeset
|
528 pixel = *plane_b; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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42
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|
529 src = FBUF_SRC_B; |
|
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diff
changeset
|
530 } else if (*sprite_buf & 0xF) { |
|
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diff
changeset
|
531 pixel = *sprite_buf; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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42
diff
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|
532 src = FBUF_SRC_S; |
|
20
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diff
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|
533 } else if (*plane_a & 0xF) { |
|
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diff
changeset
|
534 pixel = *plane_a; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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42
diff
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|
535 src = a_src; |
|
20
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diff
changeset
|
536 } else if (*plane_b & 0xF){ |
|
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diff
changeset
|
537 pixel = *plane_b; |
|
43
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42
diff
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|
538 src = FBUF_SRC_B; |
|
20
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diff
changeset
|
539 } else { |
|
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parents:
diff
changeset
|
540 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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parents:
42
diff
changeset
|
541 src = FBUF_SRC_BG; |
|
20
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diff
changeset
|
542 } |
|
43
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42
diff
changeset
|
543 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
|
20
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diff
changeset
|
544 } |
|
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parents:
diff
changeset
|
545 } else { |
|
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parents:
diff
changeset
|
546 //dst = context->framebuf + line * 320; |
|
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diff
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|
547 //sprite_buf = context->linebuf + col * 8; |
|
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parents:
diff
changeset
|
548 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
|
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diff
changeset
|
549 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
|
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parents:
diff
changeset
|
550 //end = dst + 8; |
|
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parents:
diff
changeset
|
551 } |
|
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parents:
diff
changeset
|
552 |
| 40 | 553 uint16_t remaining; |
| 554 if (!(context->flags & FLAG_WINDOW)) { | |
| 555 remaining = context->hscroll_a & 0xF; | |
| 556 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
| 557 } | |
|
39
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
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38
diff
changeset
|
558 remaining = context->hscroll_b & 0xF; |
|
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
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38
diff
changeset
|
559 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
|
20
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diff
changeset
|
560 } |
|
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diff
changeset
|
561 |
|
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diff
changeset
|
562 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
|
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diff
changeset
|
563 case startcyc:\ |
|
f664eeb55cb4
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diff
changeset
|
564 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
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parents:
diff
changeset
|
565 break;\ |
|
f664eeb55cb4
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parents:
diff
changeset
|
566 case (startcyc+1):\ |
|
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parents:
diff
changeset
|
567 external_slot(context);\ |
|
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parents:
diff
changeset
|
568 break;\ |
|
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
569 case (startcyc+2):\ |
|
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
570 render_map_1(context);\ |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 case (startcyc+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
579 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 case startcyc:\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
591 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 case (startcyc+1):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 case (startcyc+2):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 render_map_1(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 case (startcyc+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
598 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
600 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
601 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
607 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
612 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 void vdp_h40(uint32_t line, uint32_t linecyc, vdp_context * context) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 uint16_t address; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 uint32_t mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 case 0: |
|
26
a7c2b92d8056
Fix management of context->sprite_draws so the sprite layer only draws when it should
Mike Pavone <pavone@retrodev.com>
parents:
25
diff
changeset
|
621 context->cur_slot = MAX_DRAWS-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 memset(context->linebuf, 0, LINEBUF_SIZE); |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
623 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
626 case 2: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 case 3: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
628 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 //sprite attribute table scan starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 case 4: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
632 render_sprite_cells( context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 context->sprite_index = 0x80; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 context->slot_counter = MAX_SPRITES_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 13: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 14: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 case 19: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 //!HSYNC asserted |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
655 case 22: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
656 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 case 26: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 27: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 28: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 case 31: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 case 32: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
671 case 33: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 case 34: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
673 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
674 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
675 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 case 35: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 mask = 0; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 if (context->regs[REG_MODE_3] & 0x2) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 mask |= 0xF8; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 if (context->regs[REG_MODE_3] & 0x1) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
683 mask |= 0x7; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 line &= mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 address += line * 4; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
687 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
688 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
689 //printf("%d: HScroll A: %d, HScroll B: %d\n", line, context->hscroll_a, context->hscroll_b); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
690 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
691 case 36: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
692 //!HSYNC high |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 case 37: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 case 38: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 case 39: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
696 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
697 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
698 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
699 case 40: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
700 read_map_scroll_a(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
701 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
702 case 41: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
703 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
704 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
705 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
706 case 42: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 render_map_1(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
709 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 case 43: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 render_map_2(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
712 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
713 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
714 case 44: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
715 read_map_scroll_b(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
716 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
717 case 45: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
718 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
719 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
720 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
721 case 46: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
722 render_map_3(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
723 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
724 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
725 case 47: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 render_map_output(line, 0, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
727 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
728 //reverse context slot counter so it counts the number of sprite slots |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
729 //filled rather than the number of available slots |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
730 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
|
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
731 context->cur_slot = MAX_SPRITES_LINE-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
732 context->sprite_draws = MAX_DRAWS; |
|
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
733 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
734 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
735 COLUMN_RENDER_BLOCK(2, 48) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 COLUMN_RENDER_BLOCK(4, 56) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 COLUMN_RENDER_BLOCK(6, 64) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
738 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
739 COLUMN_RENDER_BLOCK(10, 80) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 COLUMN_RENDER_BLOCK(12, 88) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 COLUMN_RENDER_BLOCK(14, 96) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
742 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
743 COLUMN_RENDER_BLOCK(18, 112) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 COLUMN_RENDER_BLOCK(20, 120) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
745 COLUMN_RENDER_BLOCK(22, 128) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
746 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
747 COLUMN_RENDER_BLOCK(26, 144) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 COLUMN_RENDER_BLOCK(28, 152) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 COLUMN_RENDER_BLOCK(30, 160) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
751 COLUMN_RENDER_BLOCK(34, 176) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
752 COLUMN_RENDER_BLOCK(36, 184) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
753 COLUMN_RENDER_BLOCK(38, 192) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
754 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
755 case 208: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
756 case 209: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
759 default: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
760 //leftovers from HSYNC clock change nonsense |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
761 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
762 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
763 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
764 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
765 void vdp_h32(uint32_t line, uint32_t linecyc, vdp_context * context) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
766 { |
| 37 | 767 uint16_t address; |
| 768 uint32_t mask; | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
769 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
770 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
771 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
772 case 0: |
| 37 | 773 context->cur_slot = MAX_DRAWS_H32-1; |
| 774 memset(context->linebuf, 0, LINEBUF_SIZE); | |
| 775 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
776 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
777 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
778 case 2: |
| 37 | 779 case 3: |
| 780 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
781 break; |
| 37 | 782 //sprite attribute table scan starts |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
783 case 4: |
| 37 | 784 render_sprite_cells( context); |
| 785 context->sprite_index = 0x80; | |
| 786 context->slot_counter = MAX_SPRITES_LINE_H32; | |
| 787 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
788 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
789 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
790 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
791 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
792 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
793 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
794 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
795 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
796 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
797 case 13: |
| 37 | 798 render_sprite_cells(context); |
| 799 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
800 case 14: |
| 37 | 801 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
802 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
803 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
804 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
805 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
806 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
807 case 19: |
| 37 | 808 //HSYNC start |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
809 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
810 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
811 case 22: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
812 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
813 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
814 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
815 case 26: |
| 37 | 816 render_sprite_cells(context); |
| 817 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
818 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
819 case 27: |
| 37 | 820 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
821 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
822 case 28: |
| 37 | 823 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
| 824 mask = 0; | |
| 825 if (context->regs[REG_MODE_3] & 0x2) { | |
| 826 mask |= 0xF8; | |
| 827 } | |
| 828 if (context->regs[REG_MODE_3] & 0x1) { | |
| 829 mask |= 0x7; | |
| 830 } | |
| 831 line &= mask; | |
| 832 address += line * 4; | |
| 833 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
| 834 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
| 835 //printf("%d: HScroll A: %d, HScroll B: %d\n", line, context->hscroll_a, context->hscroll_b); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
836 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
837 case 29: |
|
f664eeb55cb4
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|
838 case 30: |
|
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|
839 case 31: |
| 37 | 840 case 32: |
| 841 render_sprite_cells(context); | |
| 842 scan_sprite_table(line, context); | |
|
20
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|
843 break; |
| 37 | 844 //!HSYNC high |
|
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|
845 case 33: |
| 37 | 846 read_map_scroll_a(0, line, context); |
|
20
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diff
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|
847 break; |
|
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diff
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|
848 case 34: |
| 37 | 849 render_sprite_cells(context); |
| 850 scan_sprite_table(line, context); | |
|
20
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|
851 break; |
|
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Mike Pavone <pavone@retrodev.com>
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|
852 case 35: |
| 37 | 853 render_map_1(context); |
| 854 scan_sprite_table(line, context);//Just a guess | |
|
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|
855 break; |
|
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diff
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|
856 case 36: |
| 37 | 857 render_map_2(context); |
| 858 scan_sprite_table(line, context);//Just a guess | |
|
20
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diff
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|
859 break; |
|
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diff
changeset
|
860 case 37: |
| 37 | 861 read_map_scroll_b(0, line, context); |
|
20
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diff
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|
862 break; |
|
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diff
changeset
|
863 case 38: |
| 37 | 864 render_sprite_cells(context); |
| 865 scan_sprite_table(line, context); | |
|
20
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diff
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|
866 break; |
|
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|
867 case 39: |
| 37 | 868 render_map_3(context); |
| 869 scan_sprite_table(line, context);//Just a guess | |
|
20
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parents:
diff
changeset
|
870 break; |
|
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diff
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|
871 case 40: |
| 37 | 872 render_map_output(line, 0, context); |
| 873 scan_sprite_table(line, context);//Just a guess | |
| 874 //reverse context slot counter so it counts the number of sprite slots | |
| 875 //filled rather than the number of available slots | |
| 876 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
| 877 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
| 878 context->sprite_draws = MAX_DRAWS_H32; | |
| 879 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
|
20
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|
880 break; |
| 37 | 881 COLUMN_RENDER_BLOCK(2, 41) |
| 882 COLUMN_RENDER_BLOCK(4, 49) | |
| 883 COLUMN_RENDER_BLOCK(6, 57) | |
| 884 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
| 885 COLUMN_RENDER_BLOCK(10, 73) | |
| 886 COLUMN_RENDER_BLOCK(12, 81) | |
| 887 COLUMN_RENDER_BLOCK(14, 89) | |
| 888 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
| 889 COLUMN_RENDER_BLOCK(18, 105) | |
| 890 COLUMN_RENDER_BLOCK(20, 113) | |
| 891 COLUMN_RENDER_BLOCK(22, 121) | |
| 892 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
| 893 COLUMN_RENDER_BLOCK(26, 137) | |
| 894 COLUMN_RENDER_BLOCK(28, 145) | |
| 895 COLUMN_RENDER_BLOCK(30, 153) | |
| 896 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
|
20
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diff
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|
897 case 169: |
|
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
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diff
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|
898 case 170: |
| 37 | 899 external_slot(context); |
|
20
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diff
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|
900 break; |
|
f664eeb55cb4
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parents:
diff
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|
901 } |
|
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parents:
diff
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|
902 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
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diff
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|
903 void latch_mode(vdp_context * context) |
|
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
904 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
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|
905 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
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|
906 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
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|
907 |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
908 int is_refresh(vdp_context * context) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
909 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
910 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
911 if (context->latched_mode & BIT_H40) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
912 linecyc = linecyc/16; |
|
189
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Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
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|
913 //TODO: Figure out the exact behavior that reduces DMA slots for direct color DMA demos |
|
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
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180
diff
changeset
|
914 return (linecyc == 37 || linecyc == 69 || linecyc == 102 || linecyc == 133 || linecyc == 165 || linecyc == 197 || linecyc >= 210 || (linecyc < 6 && (context->flags & FLAG_DMA_RUN) && ((context->dma_cd & 0xF) == CRAM_WRITE))); |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
915 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
916 linecyc = linecyc/20; |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
917 //TODO: Figure out which slots are refresh when display is off in 32-cell mode |
|
191
1b4d856b067a
Fixes for direct color dma stuff
Mike Pavone <pavone@retrodev.com>
parents:
190
diff
changeset
|
918 //These numbers are guesses based on H40 numbers |
|
1b4d856b067a
Fixes for direct color dma stuff
Mike Pavone <pavone@retrodev.com>
parents:
190
diff
changeset
|
919 return (linecyc == 24 || linecyc == 56 || linecyc == 88 || linecyc == 120 || linecyc == 152 || (linecyc < 5 && (context->flags & FLAG_DMA_RUN) && ((context->dma_cd & 0xF) == CRAM_WRITE))); |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
920 //The numbers below are the refresh slots during active display |
|
191
1b4d856b067a
Fixes for direct color dma stuff
Mike Pavone <pavone@retrodev.com>
parents:
190
diff
changeset
|
921 //return (linecyc == 66 || linecyc == 98 || linecyc == 130 || linecyc == 162); |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
922 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
923 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
924 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
925 void check_render_bg(vdp_context * context, int32_t line) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
926 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
927 if (line > 0) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
928 line -= 1; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
929 uint16_t * start = NULL, *end = NULL; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
930 uint32_t linecyc = (context->cycles % MCLKS_LINE); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
931 if (context->latched_mode & BIT_H40) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
932 linecyc /= 16; |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
933 if (linecyc >= 50 && linecyc < 210) { |
|
190
4cb8a3891e26
Small fix to bg drawing that yields the proper res for direct color DMA
Mike Pavone <pavone@retrodev.com>
parents:
189
diff
changeset
|
934 uint32_t x = (linecyc-50)*2; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
935 start = context->framebuf + line * 320 + x; |
|
190
4cb8a3891e26
Small fix to bg drawing that yields the proper res for direct color DMA
Mike Pavone <pavone@retrodev.com>
parents:
189
diff
changeset
|
936 end = start + 2; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
937 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
938 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
939 linecyc /= 20; |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
940 if (linecyc >= 43 && linecyc < 171) { |
|
190
4cb8a3891e26
Small fix to bg drawing that yields the proper res for direct color DMA
Mike Pavone <pavone@retrodev.com>
parents:
189
diff
changeset
|
941 uint32_t x = (linecyc-43)*2; |
|
191
1b4d856b067a
Fixes for direct color dma stuff
Mike Pavone <pavone@retrodev.com>
parents:
190
diff
changeset
|
942 start = context->framebuf + line * 320 + x; |
|
190
4cb8a3891e26
Small fix to bg drawing that yields the proper res for direct color DMA
Mike Pavone <pavone@retrodev.com>
parents:
189
diff
changeset
|
943 end = start + 2; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
944 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
945 } |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
946 uint16_t color = context->cram[context->regs[REG_BG_COLOR] & 0x3F]; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
947 while (start != end) { |
|
189
806c3b7a6f2a
Fix background rendering when display is off and improve refresh cycle emulation so that direct color DMA demos work
Mike Pavone <pavone@retrodev.com>
parents:
180
diff
changeset
|
948 *start = color; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
949 ++start; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
950 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
951 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
952 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
953 |
|
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
954 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
955 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
956 while(context->cycles < target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
957 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
958 uint32_t line = context->cycles / MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
959 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
960 if (!line) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
961 latch_mode(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
962 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
963 if (line < active_lines && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
964 //first sort-of active line is treated as 255 internally |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
965 //it's used for gathering sprite info for line |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
966 line = (line - 1) & 0xFF; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
967 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
968 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
969 //Convert to slot number |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
970 if (context->latched_mode & BIT_H40){ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
971 //TODO: Deal with nasty clock switching during HBLANK |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
972 linecyc = linecyc/16; |
|
54
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
973 vdp_h40(line, linecyc, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
974 context->cycles += 16; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
975 } else { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
976 linecyc = linecyc/20; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
977 vdp_h32(line, linecyc, context); |
|
20
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978 context->cycles += 20; |
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979 } |
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980 } else { |
|
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981 if (!is_refresh(context)) { |
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982 external_slot(context); |
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983 } |
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984 if (line < active_lines) { |
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985 check_render_bg(context, line); |
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986 } |
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987 if (context->latched_mode & BIT_H40){ |
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988 //TODO: Deal with nasty clock switching during HBLANK |
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989 context->cycles += 16; |
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990 } else { |
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991 context->cycles += 20; |
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992 } |
|
20
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993 } |
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994 } |
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995 } |
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996 |
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997 uint32_t vdp_run_to_vblank(vdp_context * context) |
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998 { |
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999 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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1000 vdp_run_context(context, target_cycles); |
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1001 return context->cycles; |
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1002 } |
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1003 |
| 75 | 1004 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) |
| 1005 { | |
| 1006 for(;;) { | |
| 1007 uint32_t dmalen = (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]; | |
| 1008 if (!dmalen) { | |
| 1009 dmalen = 0x10000; | |
| 1010 } | |
| 1011 uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); | |
| 1012 if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { | |
| 1013 //DMA copies take twice as long to complete since they require a read and a write | |
| 1014 //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word | |
| 1015 min_dma_complete *= 2; | |
| 1016 } | |
| 1017 min_dma_complete += context->cycles; | |
| 1018 if (target_cycles < min_dma_complete) { | |
| 1019 vdp_run_context(context, target_cycles); | |
| 1020 return; | |
| 1021 } else { | |
| 1022 vdp_run_context(context, min_dma_complete); | |
| 1023 if (!(context->flags & FLAG_DMA_RUN)) { | |
| 1024 return; | |
| 1025 } | |
| 1026 } | |
| 1027 } | |
| 1028 } | |
| 1029 | |
| 1030 int vdp_control_port_write(vdp_context * context, uint16_t value) | |
|
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1031 { |
|
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1032 //printf("control port write: %X\n", value); |
|
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1033 if (context->flags & FLAG_DMA_RUN) { |
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1034 return -1; |
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1035 } |
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1036 if (context->flags & FLAG_PENDING) { |
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1037 context->address = (context->address & 0x3FFF) | (value << 14); |
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1038 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); |
| 75 | 1039 context->flags &= ~FLAG_PENDING; |
|
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1040 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); |
| 75 | 1041 if (context->cd & 0x20) { |
| 1042 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { | |
| 1043 //DMA copy or 68K -> VDP, transfer starts immediately | |
| 1044 context->flags |= FLAG_DMA_RUN; | |
|
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1045 context->dma_cd = context->cd; |
| 75 | 1046 if (!(context->regs[REG_DMASRC_H] & 0x80)) { |
| 1047 return 1; | |
| 1048 } | |
| 1049 } | |
|
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1050 } |
|
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1051 } else { |
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1052 if ((value & 0xC000) == 0x8000) { |
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1053 //Register write |
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1054 uint8_t reg = (value >> 8) & 0x1F; |
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1055 if (reg < VDP_REGS) { |
|
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1056 //printf("register %d set to %X\n", reg, value & 0xFF); |
|
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1057 context->regs[reg] = value; |
|
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1058 if (reg == REG_MODE_2) { |
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1059 //printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
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1060 } |
|
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1061 } |
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1062 } else { |
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1063 context->flags |= FLAG_PENDING; |
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1064 context->address = (context->address &0xC000) | (value & 0x3FFF); |
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1065 context->cd = (context->cd &0x3C) | (value >> 14); |
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1066 } |
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1067 } |
| 75 | 1068 return 0; |
|
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1069 } |
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1070 |
|
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1071 int vdp_data_port_write(vdp_context * context, uint16_t value) |
|
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1072 { |
|
58
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1073 //printf("data port write: %X\n", value); |
|
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1074 if (context->flags & FLAG_DMA_RUN) { |
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1075 return -1; |
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1076 } |
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1077 if (!(context->cd & 1)) { |
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1078 //ignore writes when cd is configured for read |
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1079 return 0; |
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1080 } |
|
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|
1081 context->flags &= ~FLAG_PENDING; |
|
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1082 /*if (context->fifo_cur == context->fifo_end) { |
|
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1083 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
|
109
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1084 }*/ |
|
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1085 while (context->fifo_cur == context->fifo_end) { |
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1086 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1087 } |
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|
1088 context->fifo_cur->cycle = context->cycles; |
| 138 | 1089 context->fifo_cur->address = context->address; |
|
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|
1090 context->fifo_cur->value = value; |
| 138 | 1091 context->fifo_cur->cd = context->cd; |
|
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1092 context->fifo_cur->partial = 0; |
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|
1093 context->fifo_cur++; |
| 138 | 1094 context->address += context->regs[REG_AUTOINC]; |
|
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1095 return 0; |
|
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1096 } |
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1097 |
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1098 uint16_t vdp_control_port_read(vdp_context * context) |
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1099 { |
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1100 context->flags &= ~FLAG_PENDING; |
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1101 uint16_t value = 0x3400; |
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1102 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
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1103 value |= 0x200; |
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1104 } |
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1105 if (context->fifo_cur == context->fifo_end) { |
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1106 value |= 0x100; |
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1107 } |
|
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1108 if (context->flags & FLAG_DMA_RUN) { |
|
141
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|
1109 value |= 0x2; |
| 75 | 1110 } |
| 137 | 1111 uint32_t line= context->cycles / MCLKS_LINE; |
| 1112 if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE)) { | |
| 1113 value |= 0x8; | |
| 1114 } | |
|
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1115 //TODO: Lots of other bits in status port |
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1116 return value; |
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1117 } |
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1118 |
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1119 uint16_t vdp_data_port_read(vdp_context * context) |
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1120 { |
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1121 context->flags &= ~FLAG_PENDING; |
| 138 | 1122 if (context->cd & 1) { |
|
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1123 return 0; |
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1124 } |
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1125 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
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1126 context->flags &= ~FLAG_UNUSED_SLOT; |
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1127 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1128 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1129 } |
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1130 uint16_t value = 0; |
| 138 | 1131 switch (context->cd & 0xF) |
|
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1132 { |
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1133 case VRAM_READ: |
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1134 value = context->vdpmem[context->address] << 8; |
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1135 context->flags &= ~FLAG_UNUSED_SLOT; |
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1136 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1137 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1138 } |
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1139 value |= context->vdpmem[context->address ^ 1]; |
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1140 break; |
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1141 case CRAM_READ: |
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1142 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
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1143 break; |
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1144 case VSRAM_READ: |
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1145 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
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1146 value = context->vsram[context->address & 63]; |
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1147 } |
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1148 break; |
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1149 } |
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1150 context->address += context->regs[REG_AUTOINC]; |
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1151 return value; |
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1152 } |
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1153 |
| 137 | 1154 uint16_t vdp_hv_counter_read(vdp_context * context) |
| 1155 { | |
| 1156 uint32_t line= context->cycles / MCLKS_LINE; | |
| 1157 if (!line) { | |
| 1158 line = 0xFF; | |
| 1159 } else { | |
| 1160 line--; | |
| 1161 if (line > 0xEA) { | |
| 1162 line = (line + 0xFA) & 0xFF; | |
| 1163 } | |
| 1164 } | |
| 1165 uint32_t linecyc = context->cycles % MCLKS_LINE; | |
| 1166 if (context->latched_mode & BIT_H40) { | |
| 1167 linecyc /= 8; | |
| 1168 if (linecyc >= 86) { | |
| 1169 linecyc -= 86; | |
| 1170 } else { | |
| 1171 linecyc += 334; | |
| 1172 } | |
| 1173 if (linecyc > 0x16C) { | |
| 1174 linecyc += 92; | |
| 1175 } | |
| 1176 } else { | |
| 1177 linecyc /= 10; | |
| 1178 if (linecyc >= 74) { | |
| 1179 linecyc -= 74; | |
| 1180 } else { | |
| 1181 linecyc += 268; | |
| 1182 } | |
| 1183 if (linecyc > 0x127) { | |
| 1184 linecyc += 170; | |
| 1185 } | |
| 1186 } | |
| 1187 linecyc &= 0xFF; | |
| 1188 return (line << 8) | linecyc; | |
| 1189 } | |
| 1190 | |
|
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1191 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
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1192 { |
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1193 context->cycles -= deduction; |
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1194 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
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1195 if (start->cycle >= deduction) { |
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1196 start->cycle -= deduction; |
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1197 } else { |
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1198 start->cycle = 0; |
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1199 } |
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1200 } |
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1201 } |
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1202 |
|
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1203 #define GST_VDP_REGS 0xFA |
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1204 #define GST_VDP_MEM 0x12478 |
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1205 |
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1206 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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1207 { |
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1208 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1209 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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1210 fread(context->regs, 1, VDP_REGS, state_file); |
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1211 latch_mode(context); |
|
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1212 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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1213 for (int i = 0; i < CRAM_SIZE; i++) { |
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1214 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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|
1215 } |
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|
1216 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
|
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|
1217 for (int i = 0; i < VSRAM_SIZE; i++) { |
|
23
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diff
changeset
|
1218 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
|
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|
1219 } |
|
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|
1220 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
|
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|
1221 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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|
1222 } |
|
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1223 |
|
56
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|
1224 void vdp_save_state(vdp_context * context, FILE * outfile) |
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|
1225 { |
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|
1226 uint8_t tmp_buf[CRAM_SIZE*2]; |
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|
1227 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
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|
1228 fwrite(context->regs, 1, VDP_REGS, outfile); |
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|
1229 for (int i = 0; i < CRAM_SIZE; i++) { |
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|
1230 tmp_buf[i*2] = context->cram[i]; |
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|
1231 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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|
1232 } |
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|
1233 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
|
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|
1234 for (int i = 0; i < VSRAM_SIZE; i++) { |
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|
1235 tmp_buf[i*2] = context->vsram[i]; |
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|
1236 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
|
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|
1237 } |
|
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|
1238 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
|
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|
1239 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
|
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|
1240 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
|
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|
1241 } |
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|
1242 |