Mercurial > repos > blastem
annotate vdp.c @ 144:177ba1a5af9c
Comment out some debug printfs
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 31 Dec 2012 18:53:52 -0800 |
| parents | e5487ef04619 |
| children | 139e5dcd6aa3 |
| 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 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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86 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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87 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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88 if (y <= line && line < (y + height)) { |
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89 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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90 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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91 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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92 context->sprite_info_list[context->slot_counter].y = y; |
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93 } |
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94 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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95 if (context->sprite_index && context->slot_counter) |
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96 { |
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97 address = context->sprite_index * 8 + sat_address; |
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98 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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99 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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100 if (y <= line && line < (y + height)) { |
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101 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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102 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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103 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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104 context->sprite_info_list[context->slot_counter].y = y; |
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105 } |
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106 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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107 } |
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108 } |
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109 } |
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110 |
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111 void read_sprite_x(uint32_t line, vdp_context * context) |
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112 { |
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113 if (context->cur_slot >= context->slot_counter) { |
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114 if (context->sprite_draws) { |
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115 line += 1; |
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116 line &= 0xFF; |
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117 //in tiles |
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118 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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119 //in pixels |
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120 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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121 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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122 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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123 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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124 uint8_t row; |
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125 if (tileinfo & MAP_BIT_V_FLIP) { |
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126 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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127 } else { |
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128 row = line-context->sprite_info_list[context->cur_slot].y; |
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129 } |
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130 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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131 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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132 if (x) { |
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133 context->flags |= FLAG_CAN_MASK; |
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134 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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135 context->flags |= FLAG_MASKED; |
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136 } |
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137 |
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138 context->flags &= ~FLAG_DOT_OFLOW; |
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139 int16_t i; |
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140 if (context->flags & FLAG_MASKED) { |
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141 for (i=0; i < width && context->sprite_draws; i++) { |
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142 --context->sprite_draws; |
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143 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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144 } |
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145 } else { |
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146 x -= 128; |
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147 int16_t base_x = x; |
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148 int16_t dir; |
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149 if (tileinfo & MAP_BIT_H_FLIP) { |
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150 x += (width-1) * 8; |
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151 dir = -8; |
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152 } else { |
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153 dir = 8; |
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154 } |
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155 //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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156 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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157 --context->sprite_draws; |
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158 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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159 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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160 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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161 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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162 } |
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163 } |
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164 if (i < width) { |
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165 context->flags |= FLAG_DOT_OFLOW; |
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166 } |
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167 context->cur_slot--; |
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168 } else { |
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169 context->flags |= FLAG_DOT_OFLOW; |
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170 } |
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171 } |
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172 } |
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173 |
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174 #define VRAM_READ 0 |
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175 #define VRAM_WRITE 1 |
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176 #define CRAM_READ 8 |
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177 #define CRAM_WRITE 3 |
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178 #define VSRAM_READ 4 |
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179 #define VSRAM_WRITE 5 |
| 75 | 180 #define DMA_START 0x20 |
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181 |
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182 void external_slot(vdp_context * context) |
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183 { |
| 75 | 184 //TODO: Figure out what happens if CD bit 4 is not set in DMA copy mode |
| 185 //TODO: Figure out what happens when CD:0-3 is not set to a write mode in DMA operations | |
| 186 //TODO: Figure out what happens if DMA gets disabled part way through a DMA fill or DMA copy | |
| 187 if((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->flags & FLAG_DMA_RUN)) { | |
| 188 uint16_t dma_len; | |
| 189 switch(context->regs[REG_DMASRC_H] & 0xC0) | |
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190 { |
| 75 | 191 //68K -> VDP |
| 192 case 0: | |
| 193 case 0x40: | |
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194 switch(context->dma_cd & 0xF) |
| 75 | 195 { |
| 196 case VRAM_WRITE: | |
| 197 if (context->flags & FLAG_DMA_PROG) { | |
| 198 context->vdpmem[context->address ^ 1] = context->dma_val; | |
| 199 context->flags &= ~FLAG_DMA_PROG; | |
| 200 } else { | |
| 201 context->dma_val = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
| 202 context->vdpmem[context->address] = context->dma_val >> 8; | |
| 203 context->flags |= FLAG_DMA_PROG; | |
| 204 } | |
| 205 break; | |
| 206 case CRAM_WRITE: | |
| 207 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]); | |
| 208 break; | |
| 209 case VSRAM_WRITE: | |
| 210 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 211 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]); | |
| 212 } | |
| 213 break; | |
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214 } |
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215 break; |
| 75 | 216 //Fill |
| 217 case 0x80: | |
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218 switch(context->dma_cd & 0xF) |
| 75 | 219 { |
| 220 case VRAM_WRITE: | |
| 221 //Charles MacDonald's VDP doc says that the low byte gets written first | |
| 142 | 222 context->vdpmem[context->address] = context->dma_val; |
| 223 context->dma_val = (context->dma_val << 8) | ((context->dma_val >> 8) & 0xFF); | |
| 75 | 224 break; |
| 225 case CRAM_WRITE: | |
| 226 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 227 break; | |
| 228 case VSRAM_WRITE: | |
| 229 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 230 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 231 } | |
| 232 break; | |
| 233 } | |
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234 break; |
| 75 | 235 //Copy |
| 236 case 0xC0: | |
| 237 if (context->flags & FLAG_DMA_PROG) { | |
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238 switch(context->dma_cd & 0xF) |
| 75 | 239 { |
| 240 case VRAM_WRITE: | |
| 241 context->vdpmem[context->address] = context->dma_val; | |
| 242 break; | |
| 243 case CRAM_WRITE: | |
| 244 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 245 break; | |
| 246 case VSRAM_WRITE: | |
| 247 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 248 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 249 } | |
| 250 break; | |
| 251 } | |
| 252 context->flags &= ~FLAG_DMA_PROG; | |
| 253 } else { | |
| 254 //I assume, that DMA copy copies from the same RAM as the destination | |
| 255 //but it's possible I'm mistaken | |
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256 switch(context->dma_cd & 0xF) |
| 75 | 257 { |
| 258 case VRAM_WRITE: | |
| 259 context->dma_val = context->vdpmem[(context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]]; | |
| 260 break; | |
| 261 case CRAM_WRITE: | |
| 262 context->dma_val = context->cram[context->regs[REG_DMASRC_L] & (CRAM_SIZE-1)]; | |
| 263 break; | |
| 264 case VSRAM_WRITE: | |
| 265 if ((context->regs[REG_DMASRC_L] & 63) < VSRAM_SIZE) { | |
| 266 context->dma_val = context->vsram[context->regs[REG_DMASRC_L] & 63]; | |
| 267 } else { | |
| 268 context->dma_val = 0; | |
| 269 } | |
| 270 break; | |
| 271 } | |
| 272 context->flags |= FLAG_DMA_PROG; | |
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273 } |
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274 break; |
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275 } |
| 75 | 276 if (!(context->flags & FLAG_DMA_PROG)) { |
| 277 context->address += context->regs[REG_AUTOINC]; | |
| 278 context->regs[REG_DMASRC_L] += 1; | |
| 135 | 279 if (!context->regs[REG_DMASRC_L]) { |
| 280 context->regs[REG_DMASRC_M] += 1; | |
| 281 } | |
| 75 | 282 dma_len = ((context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]) - 1; |
| 283 context->regs[REG_DMALEN_H] = dma_len >> 8; | |
| 284 context->regs[REG_DMALEN_L] = dma_len; | |
| 285 if (!dma_len) { | |
| 286 context->flags &= ~FLAG_DMA_RUN; | |
| 287 } | |
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288 } |
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289 } else { |
| 75 | 290 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
| 291 if (context->fifo_cur != start && start->cycle <= context->cycles) { | |
| 292 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->cd & DMA_START)) { | |
| 293 context->flags |= FLAG_DMA_RUN; | |
| 294 context->dma_val = start->value; | |
| 138 | 295 context->address = start->address; //undo auto-increment |
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296 context->dma_cd = context->cd; |
| 75 | 297 } else { |
| 138 | 298 switch (start->cd & 0xF) |
| 75 | 299 { |
| 300 case VRAM_WRITE: | |
| 301 if (start->partial) { | |
| 302 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); | |
| 138 | 303 context->vdpmem[start->address ^ 1] = start->value; |
| 75 | 304 } else { |
| 305 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); | |
| 138 | 306 context->vdpmem[start->address] = start->value >> 8; |
| 75 | 307 start->partial = 1; |
| 308 //skip auto-increment and removal of entry from fifo | |
| 309 return; | |
| 310 } | |
| 311 break; | |
| 312 case CRAM_WRITE: | |
|
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313 //printf("CRAM Write: %X to %X\n", start->value, context->address); |
| 138 | 314 context->cram[(start->address/2) & (CRAM_SIZE-1)] = start->value; |
| 75 | 315 break; |
| 316 case VSRAM_WRITE: | |
| 138 | 317 if (((start->address/2) & 63) < VSRAM_SIZE) { |
| 75 | 318 //printf("VSRAM Write: %X to %X\n", start->value, context->address); |
| 138 | 319 context->vsram[(start->address/2) & 63] = start->value; |
| 75 | 320 } |
| 321 break; | |
| 322 } | |
| 138 | 323 //context->address += context->regs[REG_AUTOINC]; |
| 75 | 324 } |
| 325 fifo_entry * cur = start+1; | |
| 326 if (cur < context->fifo_cur) { | |
| 327 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); | |
| 328 } | |
| 329 context->fifo_cur -= 1; | |
| 330 } else { | |
| 331 context->flags |= FLAG_UNUSED_SLOT; | |
| 332 } | |
|
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333 } |
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334 } |
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335 |
| 40 | 336 #define WINDOW_RIGHT 0x80 |
| 337 #define WINDOW_DOWN 0x80 | |
| 338 | |
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339 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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340 { |
| 40 | 341 if (!vsram_off) { |
| 342 uint16_t left_col, right_col; | |
| 343 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
|
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344 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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345 right_col = 42; |
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346 } else { |
| 40 | 347 left_col = 0; |
| 348 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
| 349 if (right_col) { | |
| 350 right_col += 2; | |
| 351 } | |
| 352 } | |
|
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353 uint16_t top_line, bottom_line; |
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354 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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355 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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356 bottom_line = 241; |
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357 } else { |
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358 top_line = 0; |
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359 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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360 } |
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361 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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362 uint16_t address = context->regs[REG_WINDOW] << 10; |
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363 uint16_t line_offset, offset, mask; |
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364 if (context->latched_mode & BIT_H40) { |
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365 address &= 0xF000; |
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366 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
|
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367 mask = 0x7F; |
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368 |
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369 } else { |
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370 address &= 0xF800; |
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371 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
|
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372 mask = 0x3F; |
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373 } |
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374 offset = address + line_offset + (((column - 2) * 2) & mask); |
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375 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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376 //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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377 offset = address + line_offset + (((column - 1) * 2) & mask); |
|
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378 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
|
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379 context->v_offset = (line) & 0x7; |
|
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380 context->flags |= FLAG_WINDOW; |
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381 return; |
| 40 | 382 } |
| 383 context->flags &= ~FLAG_WINDOW; | |
| 384 } | |
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385 uint16_t vscroll; |
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386 switch(context->regs[REG_SCROLL] & 0x30) |
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387 { |
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388 case 0: |
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389 vscroll = 0xFF; |
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390 break; |
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391 case 0x10: |
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392 vscroll = 0x1FF; |
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393 break; |
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394 case 0x20: |
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395 //TODO: Verify this behavior |
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396 vscroll = 0; |
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397 break; |
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398 case 0x30: |
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399 vscroll = 0x3FF; |
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400 break; |
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401 } |
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402 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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403 context->v_offset = vscroll & 0x7; |
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404 //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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405 vscroll /= 8; |
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406 uint16_t hscroll_mask; |
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407 uint16_t v_mul; |
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408 switch(context->regs[REG_SCROLL] & 0x3) |
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409 { |
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410 case 0: |
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411 hscroll_mask = 0x1F; |
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412 v_mul = 64; |
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413 break; |
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414 case 0x1: |
|
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415 hscroll_mask = 0x3F; |
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416 v_mul = 128; |
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417 break; |
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418 case 0x2: |
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419 //TODO: Verify this behavior |
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420 hscroll_mask = 0; |
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421 v_mul = 0; |
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422 break; |
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423 case 0x3: |
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424 hscroll_mask = 0x7F; |
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425 v_mul = 256; |
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426 break; |
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427 } |
| 28 | 428 uint16_t hscroll, offset; |
| 429 for (int i = 0; i < 2; i++) { | |
|
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430 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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431 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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432 //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 | 433 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
| 434 if (i) { | |
| 435 context->col_2 = col_val; | |
| 436 } else { | |
| 437 context->col_1 = col_val; | |
| 438 } | |
| 439 } | |
|
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440 } |
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441 |
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442 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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443 { |
|
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444 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
|
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445 } |
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446 |
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447 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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448 { |
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449 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
|
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450 } |
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451 |
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452 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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453 { |
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454 uint16_t address = ((col & 0x7FF) << 5); |
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455 if (col & MAP_BIT_V_FLIP) { |
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456 address += 28 - 4 * context->v_offset; |
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457 } else { |
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458 address += 4 * context->v_offset; |
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459 } |
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460 uint16_t pal_priority = (col >> 9) & 0x70; |
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461 int32_t dir; |
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462 if (col & MAP_BIT_H_FLIP) { |
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463 tmp_buf += 7; |
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464 dir = -1; |
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465 } else { |
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466 dir = 1; |
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467 } |
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468 for (uint32_t i=0; i < 4; i++, address++) |
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469 { |
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470 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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471 tmp_buf += dir; |
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472 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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473 tmp_buf += dir; |
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474 } |
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475 } |
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476 |
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477 void render_map_1(vdp_context * context) |
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478 { |
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479 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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480 } |
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481 |
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482 void render_map_2(vdp_context * context) |
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483 { |
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484 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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485 } |
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486 |
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487 void render_map_3(vdp_context * context) |
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488 { |
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489 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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490 } |
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491 |
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492 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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493 { |
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494 if (line >= 240) { |
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495 return; |
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496 } |
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497 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
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498 uint16_t *dst, *end; |
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499 uint8_t *sprite_buf, *plane_a, *plane_b; |
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500 if (col) |
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501 { |
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502 col-=2; |
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503 dst = context->framebuf + line * 320 + col * 8; |
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504 sprite_buf = context->linebuf + col * 8; |
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505 uint16_t a_src; |
| 40 | 506 if (context->flags & FLAG_WINDOW) { |
| 507 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
|
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508 a_src = FBUF_SRC_W; |
| 40 | 509 } else { |
| 510 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
|
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511 a_src = FBUF_SRC_A; |
| 40 | 512 } |
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513 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
| 30 | 514 end = dst + 16; |
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515 uint16_t src; |
| 30 | 516 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
|
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517 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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518 uint8_t pixel; |
|
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519 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
|
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520 pixel = *sprite_buf; |
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521 src = FBUF_SRC_S; |
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522 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
|
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523 pixel = *plane_a; |
|
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|
524 src = a_src; |
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525 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
|
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|
526 pixel = *plane_b; |
|
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|
527 src = FBUF_SRC_B; |
|
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528 } else if (*sprite_buf & 0xF) { |
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|
529 pixel = *sprite_buf; |
|
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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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|
530 src = FBUF_SRC_S; |
|
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|
531 } else if (*plane_a & 0xF) { |
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|
532 pixel = *plane_a; |
|
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|
533 src = a_src; |
|
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534 } else if (*plane_b & 0xF){ |
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|
535 pixel = *plane_b; |
|
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|
536 src = FBUF_SRC_B; |
|
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|
537 } else { |
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|
538 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
|
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|
539 src = FBUF_SRC_BG; |
|
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diff
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|
540 } |
|
43
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42
diff
changeset
|
541 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
|
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|
542 } |
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|
543 } else { |
|
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diff
changeset
|
544 //dst = context->framebuf + line * 320; |
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545 //sprite_buf = context->linebuf + col * 8; |
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|
546 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
|
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|
547 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
|
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|
548 //end = dst + 8; |
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changeset
|
549 } |
|
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|
550 |
| 40 | 551 uint16_t remaining; |
| 552 if (!(context->flags & FLAG_WINDOW)) { | |
| 553 remaining = context->hscroll_a & 0xF; | |
| 554 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
| 555 } | |
|
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38
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|
556 remaining = context->hscroll_b & 0xF; |
|
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|
557 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
|
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558 } |
|
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|
559 |
|
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|
560 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
|
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|
561 case startcyc:\ |
|
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|
562 read_map_scroll_a(column, line, context);\ |
|
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diff
changeset
|
563 break;\ |
|
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diff
changeset
|
564 case (startcyc+1):\ |
|
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changeset
|
565 external_slot(context);\ |
|
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|
566 break;\ |
|
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diff
changeset
|
567 case (startcyc+2):\ |
|
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diff
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|
568 render_map_1(context);\ |
|
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changeset
|
569 break;\ |
|
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diff
changeset
|
570 case (startcyc+3):\ |
|
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|
571 render_map_2(context);\ |
|
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changeset
|
572 break;\ |
|
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diff
changeset
|
573 case (startcyc+4):\ |
|
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diff
changeset
|
574 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
579 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 case startcyc:\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 case (startcyc+1):\ |
|
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+2):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 render_map_1(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 case (startcyc+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
598 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
600 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
601 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
607 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 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
|
612 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 uint16_t address; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 uint32_t mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 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
|
619 context->cur_slot = MAX_DRAWS-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 memset(context->linebuf, 0, LINEBUF_SIZE); |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
621 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
623 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 case 2: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 case 3: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
626 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 //sprite attribute table scan starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 case 4: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
630 render_sprite_cells( context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 context->sprite_index = 0x80; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 context->slot_counter = MAX_SPRITES_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 13: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 14: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 19: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 //!HSYNC asserted |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 case 22: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
654 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
655 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 case 26: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 case 27: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 case 28: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 31: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 case 32: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 case 33: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 case 34: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
671 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
673 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
674 case 35: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
675 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 mask = 0; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 if (context->regs[REG_MODE_3] & 0x2) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 mask |= 0xF8; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 if (context->regs[REG_MODE_3] & 0x1) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 mask |= 0x7; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
683 line &= mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 address += line * 4; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 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
|
686 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
|
687 //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
|
688 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
689 case 36: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
690 //!HSYNC high |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
691 case 37: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
692 case 38: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 case 39: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
694 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
696 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
697 case 40: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
698 read_map_scroll_a(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
699 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
700 case 41: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
701 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
702 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
703 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
704 case 42: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
705 render_map_1(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
706 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 case 43: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
709 render_map_2(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
712 case 44: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
713 read_map_scroll_b(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
714 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
715 case 45: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
716 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
717 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
718 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
719 case 46: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
720 render_map_3(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
721 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
722 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
723 case 47: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
724 render_map_output(line, 0, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
725 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 //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
|
727 //filled rather than the number of available slots |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
728 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
|
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
729 context->cur_slot = MAX_SPRITES_LINE-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
730 context->sprite_draws = MAX_DRAWS; |
|
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
731 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
732 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
733 COLUMN_RENDER_BLOCK(2, 48) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
734 COLUMN_RENDER_BLOCK(4, 56) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
735 COLUMN_RENDER_BLOCK(6, 64) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 COLUMN_RENDER_BLOCK(10, 80) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
738 COLUMN_RENDER_BLOCK(12, 88) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
739 COLUMN_RENDER_BLOCK(14, 96) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 COLUMN_RENDER_BLOCK(18, 112) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
742 COLUMN_RENDER_BLOCK(20, 120) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
743 COLUMN_RENDER_BLOCK(22, 128) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
745 COLUMN_RENDER_BLOCK(26, 144) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
746 COLUMN_RENDER_BLOCK(28, 152) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
747 COLUMN_RENDER_BLOCK(30, 160) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 COLUMN_RENDER_BLOCK(34, 176) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 COLUMN_RENDER_BLOCK(36, 184) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
751 COLUMN_RENDER_BLOCK(38, 192) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
752 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
753 case 208: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
754 case 209: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
755 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
756 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 default: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 //leftovers from HSYNC clock change nonsense |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
759 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
760 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
761 } |
|
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 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
|
764 { |
| 37 | 765 uint16_t address; |
| 766 uint32_t mask; | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
767 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
768 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
769 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
770 case 0: |
| 37 | 771 context->cur_slot = MAX_DRAWS_H32-1; |
| 772 memset(context->linebuf, 0, LINEBUF_SIZE); | |
| 773 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
774 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
775 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
776 case 2: |
| 37 | 777 case 3: |
| 778 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
779 break; |
| 37 | 780 //sprite attribute table scan starts |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
781 case 4: |
| 37 | 782 render_sprite_cells( context); |
| 783 context->sprite_index = 0x80; | |
| 784 context->slot_counter = MAX_SPRITES_LINE_H32; | |
| 785 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
786 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
787 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
788 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
789 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
790 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
791 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
792 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
793 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
794 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
795 case 13: |
| 37 | 796 render_sprite_cells(context); |
| 797 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
798 case 14: |
| 37 | 799 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
800 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
801 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
802 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
803 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
804 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
805 case 19: |
| 37 | 806 //HSYNC start |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
807 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
808 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
809 case 22: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
810 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
811 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
812 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
813 case 26: |
| 37 | 814 render_sprite_cells(context); |
| 815 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
816 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
817 case 27: |
| 37 | 818 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
819 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
820 case 28: |
| 37 | 821 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
| 822 mask = 0; | |
| 823 if (context->regs[REG_MODE_3] & 0x2) { | |
| 824 mask |= 0xF8; | |
| 825 } | |
| 826 if (context->regs[REG_MODE_3] & 0x1) { | |
| 827 mask |= 0x7; | |
| 828 } | |
| 829 line &= mask; | |
| 830 address += line * 4; | |
| 831 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
| 832 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
| 833 //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
|
834 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
835 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
836 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
837 case 31: |
| 37 | 838 case 32: |
| 839 render_sprite_cells(context); | |
| 840 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
841 break; |
| 37 | 842 //!HSYNC high |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
843 case 33: |
| 37 | 844 read_map_scroll_a(0, line, context); |
|
20
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diff
changeset
|
845 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
846 case 34: |
| 37 | 847 render_sprite_cells(context); |
| 848 scan_sprite_table(line, context); | |
|
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
849 break; |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
850 case 35: |
| 37 | 851 render_map_1(context); |
| 852 scan_sprite_table(line, context);//Just a guess | |
|
20
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
853 break; |
|
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
854 case 36: |
| 37 | 855 render_map_2(context); |
| 856 scan_sprite_table(line, context);//Just a guess | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
857 break; |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
858 case 37: |
| 37 | 859 read_map_scroll_b(0, line, context); |
|
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
860 break; |
|
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
861 case 38: |
| 37 | 862 render_sprite_cells(context); |
| 863 scan_sprite_table(line, context); | |
|
20
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parents:
diff
changeset
|
864 break; |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
865 case 39: |
| 37 | 866 render_map_3(context); |
| 867 scan_sprite_table(line, context);//Just a guess | |
|
20
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parents:
diff
changeset
|
868 break; |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
869 case 40: |
| 37 | 870 render_map_output(line, 0, context); |
| 871 scan_sprite_table(line, context);//Just a guess | |
| 872 //reverse context slot counter so it counts the number of sprite slots | |
| 873 //filled rather than the number of available slots | |
| 874 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
| 875 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
| 876 context->sprite_draws = MAX_DRAWS_H32; | |
| 877 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
|
20
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Mike Pavone <pavone@retrodev.com>
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diff
changeset
|
878 break; |
| 37 | 879 COLUMN_RENDER_BLOCK(2, 41) |
| 880 COLUMN_RENDER_BLOCK(4, 49) | |
| 881 COLUMN_RENDER_BLOCK(6, 57) | |
| 882 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
| 883 COLUMN_RENDER_BLOCK(10, 73) | |
| 884 COLUMN_RENDER_BLOCK(12, 81) | |
| 885 COLUMN_RENDER_BLOCK(14, 89) | |
| 886 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
| 887 COLUMN_RENDER_BLOCK(18, 105) | |
| 888 COLUMN_RENDER_BLOCK(20, 113) | |
| 889 COLUMN_RENDER_BLOCK(22, 121) | |
| 890 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
| 891 COLUMN_RENDER_BLOCK(26, 137) | |
| 892 COLUMN_RENDER_BLOCK(28, 145) | |
| 893 COLUMN_RENDER_BLOCK(30, 153) | |
| 894 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
|
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
895 case 169: |
|
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
896 case 170: |
| 37 | 897 external_slot(context); |
|
20
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
898 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
899 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
900 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
901 void latch_mode(vdp_context * context) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
902 { |
|
f664eeb55cb4
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parents:
diff
changeset
|
903 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
changeset
|
904 } |
|
f664eeb55cb4
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parents:
diff
changeset
|
905 |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
906 int is_refresh(vdp_context * context) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
907 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
908 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
|
909 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
|
910 linecyc = linecyc/16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
911 return (linecyc == 73 || linecyc == 105 || linecyc == 137 || linecyc == 169 || linecyc == 201); |
|
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 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
913 linecyc = linecyc/20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
914 return (linecyc == 66 || linecyc == 98 || linecyc == 130 || linecyc == 162); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
915 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
916 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
917 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
918 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
|
919 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
920 if (line > 0) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
921 line -= 1; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
922 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
|
923 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
|
924 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
|
925 linecyc /= 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
926 if (linecyc >= 55 && linecyc <= 207 && !((linecyc-55) % 8)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
927 uint32_t x = ((linecyc-55)&(~0xF))*2; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
928 start = context->framebuf + line * 320 + x; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
929 end = start + 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
930 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
931 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
932 linecyc /= 20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
933 if (linecyc >= 48 && linecyc <= 168 && !((linecyc-48) % 8)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
934 uint32_t x = ((linecyc-48)&(~0xF))*2; |
|
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 * 256 + x; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
936 end = start + 16; |
|
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 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
939 while (start != end) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
940 *start = context->regs[REG_BG_COLOR] & 0x3F; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
941 ++start; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
942 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
943 } |
|
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 |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
946 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
|
947 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
948 while(context->cycles < target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
949 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
950 uint32_t line = context->cycles / MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
951 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
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
952 if (!line) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
953 latch_mode(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
954 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
955 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
|
956 //first sort-of active line is treated as 255 internally |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
957 //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
|
958 line = (line - 1) & 0xFF; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
959 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
960 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
961 //Convert to slot number |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
962 if (context->latched_mode & BIT_H40){ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
963 //TODO: Deal with nasty clock switching during HBLANK |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
964 linecyc = linecyc/16; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
965 vdp_h40(line, linecyc, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
966 context->cycles += 16; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
967 } else { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
968 linecyc = linecyc/20; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
969 vdp_h32(line, linecyc, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
970 context->cycles += 20; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
971 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
972 } else { |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
973 if (!is_refresh(context)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
974 external_slot(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
975 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
976 if (line < active_lines) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
977 check_render_bg(context, line); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
978 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
979 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
|
980 //TODO: Deal with nasty clock switching during HBLANK |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
981 context->cycles += 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
982 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
983 context->cycles += 20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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984 } |
|
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985 } |
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986 } |
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987 } |
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988 |
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989 uint32_t vdp_run_to_vblank(vdp_context * context) |
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990 { |
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991 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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992 vdp_run_context(context, target_cycles); |
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993 return context->cycles; |
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994 } |
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995 |
| 75 | 996 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) |
| 997 { | |
| 998 for(;;) { | |
| 999 uint32_t dmalen = (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]; | |
| 1000 if (!dmalen) { | |
| 1001 dmalen = 0x10000; | |
| 1002 } | |
| 1003 uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); | |
| 1004 if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { | |
| 1005 //DMA copies take twice as long to complete since they require a read and a write | |
| 1006 //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word | |
| 1007 min_dma_complete *= 2; | |
| 1008 } | |
| 1009 min_dma_complete += context->cycles; | |
| 1010 if (target_cycles < min_dma_complete) { | |
| 1011 vdp_run_context(context, target_cycles); | |
| 1012 return; | |
| 1013 } else { | |
| 1014 vdp_run_context(context, min_dma_complete); | |
| 1015 if (!(context->flags & FLAG_DMA_RUN)) { | |
| 1016 return; | |
| 1017 } | |
| 1018 } | |
| 1019 } | |
| 1020 } | |
| 1021 | |
| 1022 int vdp_control_port_write(vdp_context * context, uint16_t value) | |
|
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1023 { |
|
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1024 //printf("control port write: %X\n", value); |
|
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1025 if (context->flags & FLAG_PENDING) { |
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1026 context->address = (context->address & 0x3FFF) | (value << 14); |
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1027 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); |
| 75 | 1028 context->flags &= ~FLAG_PENDING; |
|
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1029 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); |
| 75 | 1030 if (context->cd & 0x20) { |
| 1031 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { | |
| 1032 //DMA copy or 68K -> VDP, transfer starts immediately | |
| 1033 context->flags |= FLAG_DMA_RUN; | |
|
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1034 context->dma_cd = context->cd; |
| 75 | 1035 if (!(context->regs[REG_DMASRC_H] & 0x80)) { |
| 1036 return 1; | |
| 1037 } | |
| 1038 } | |
|
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1039 } |
|
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1040 } else { |
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1041 if ((value & 0xC000) == 0x8000) { |
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1042 //Register write |
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1043 uint8_t reg = (value >> 8) & 0x1F; |
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1044 if (reg < VDP_REGS) { |
|
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1045 //printf("register %d set to %X\n", reg, value & 0xFF); |
|
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1046 context->regs[reg] = value; |
|
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1047 /*if (reg == REG_MODE_2) { |
|
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1048 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
|
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1049 }*/ |
|
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1050 } |
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1051 } else { |
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1052 context->flags |= FLAG_PENDING; |
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1053 context->address = (context->address &0xC000) | (value & 0x3FFF); |
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1054 context->cd = (context->cd &0x3C) | (value >> 14); |
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1055 } |
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1056 } |
| 75 | 1057 return 0; |
|
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1058 } |
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1059 |
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1060 void vdp_data_port_write(vdp_context * context, uint16_t value) |
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1061 { |
|
58
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1062 //printf("data port write: %X\n", value); |
|
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1063 context->flags &= ~FLAG_PENDING; |
|
109
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1064 /*if (context->fifo_cur == context->fifo_end) { |
|
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1065 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
|
109
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1066 }*/ |
|
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1067 while (context->fifo_cur == context->fifo_end) { |
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1068 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1069 } |
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1070 context->fifo_cur->cycle = context->cycles; |
| 138 | 1071 context->fifo_cur->address = context->address; |
|
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1072 context->fifo_cur->value = value; |
| 138 | 1073 context->fifo_cur->cd = context->cd; |
|
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1074 context->fifo_cur->partial = 0; |
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1075 context->fifo_cur++; |
| 138 | 1076 context->address += context->regs[REG_AUTOINC]; |
|
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1077 } |
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1078 |
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1079 uint16_t vdp_control_port_read(vdp_context * context) |
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1080 { |
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1081 context->flags &= ~FLAG_PENDING; |
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1082 uint16_t value = 0x3400; |
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1083 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
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1084 value |= 0x200; |
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1085 } |
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1086 if (context->fifo_cur == context->fifo_end) { |
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1087 value |= 0x100; |
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1088 } |
|
141
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1089 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->flags & FLAG_DMA_RUN)) { |
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1090 value |= 0x2; |
| 75 | 1091 } |
| 137 | 1092 uint32_t line= context->cycles / MCLKS_LINE; |
| 1093 if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE)) { | |
| 1094 value |= 0x8; | |
| 1095 } | |
|
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1096 //TODO: Lots of other bits in status port |
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1097 return value; |
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1098 } |
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1099 |
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1100 uint16_t vdp_data_port_read(vdp_context * context) |
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1101 { |
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1102 context->flags &= ~FLAG_PENDING; |
| 138 | 1103 if (context->cd & 1) { |
|
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1104 return 0; |
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1105 } |
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1106 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
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1107 context->flags &= ~FLAG_UNUSED_SLOT; |
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1108 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1109 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1110 } |
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1111 uint16_t value = 0; |
| 138 | 1112 switch (context->cd & 0xF) |
|
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1113 { |
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1114 case VRAM_READ: |
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1115 value = context->vdpmem[context->address] << 8; |
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1116 context->flags &= ~FLAG_UNUSED_SLOT; |
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1117 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1118 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1119 } |
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1120 value |= context->vdpmem[context->address ^ 1]; |
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1121 break; |
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1122 case CRAM_READ: |
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1123 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
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1124 break; |
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1125 case VSRAM_READ: |
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1126 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
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1127 value = context->vsram[context->address & 63]; |
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1128 } |
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1129 break; |
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1130 } |
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1131 context->address += context->regs[REG_AUTOINC]; |
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1132 return value; |
|
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1133 } |
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1134 |
| 137 | 1135 uint16_t vdp_hv_counter_read(vdp_context * context) |
| 1136 { | |
| 1137 uint32_t line= context->cycles / MCLKS_LINE; | |
| 1138 if (!line) { | |
| 1139 line = 0xFF; | |
| 1140 } else { | |
| 1141 line--; | |
| 1142 if (line > 0xEA) { | |
| 1143 line = (line + 0xFA) & 0xFF; | |
| 1144 } | |
| 1145 } | |
| 1146 uint32_t linecyc = context->cycles % MCLKS_LINE; | |
| 1147 if (context->latched_mode & BIT_H40) { | |
| 1148 linecyc /= 8; | |
| 1149 if (linecyc >= 86) { | |
| 1150 linecyc -= 86; | |
| 1151 } else { | |
| 1152 linecyc += 334; | |
| 1153 } | |
| 1154 if (linecyc > 0x16C) { | |
| 1155 linecyc += 92; | |
| 1156 } | |
| 1157 } else { | |
| 1158 linecyc /= 10; | |
| 1159 if (linecyc >= 74) { | |
| 1160 linecyc -= 74; | |
| 1161 } else { | |
| 1162 linecyc += 268; | |
| 1163 } | |
| 1164 if (linecyc > 0x127) { | |
| 1165 linecyc += 170; | |
| 1166 } | |
| 1167 } | |
| 1168 linecyc &= 0xFF; | |
| 1169 return (line << 8) | linecyc; | |
| 1170 } | |
| 1171 | |
|
65
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1172 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
|
aef6302770c2
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1173 { |
|
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1174 context->cycles -= deduction; |
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1175 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
|
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1176 if (start->cycle >= deduction) { |
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1177 start->cycle -= deduction; |
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1178 } else { |
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1179 start->cycle = 0; |
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1180 } |
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1181 } |
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1182 } |
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1183 |
|
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1184 #define GST_VDP_REGS 0xFA |
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1185 #define GST_VDP_MEM 0x12478 |
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1186 |
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1187 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
|
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1188 { |
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1189 uint8_t tmp_buf[CRAM_SIZE*2]; |
|
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1190 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
|
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1191 fread(context->regs, 1, VDP_REGS, state_file); |
|
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1192 latch_mode(context); |
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1193 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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1194 for (int i = 0; i < CRAM_SIZE; i++) { |
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1195 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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1196 } |
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1197 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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1198 for (int i = 0; i < VSRAM_SIZE; i++) { |
|
23
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1199 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
|
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1200 } |
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1201 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
|
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1202 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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1203 } |
|
54
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1204 |
|
56
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1205 void vdp_save_state(vdp_context * context, FILE * outfile) |
|
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1206 { |
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1207 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1208 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
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1209 fwrite(context->regs, 1, VDP_REGS, outfile); |
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1210 for (int i = 0; i < CRAM_SIZE; i++) { |
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1211 tmp_buf[i*2] = context->cram[i]; |
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1212 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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1213 } |
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|
1214 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
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1215 for (int i = 0; i < VSRAM_SIZE; i++) { |
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1216 tmp_buf[i*2] = context->vsram[i]; |
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|
1217 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
|
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1218 } |
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|
1219 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
|
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|
1220 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
|
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|
1221 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
|
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|
1222 } |
|
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1223 |