Mercurial > repos > blastem
annotate vdp.c @ 103:a71544cd01ea
Don't pre-emptively translate code at interrupt vectors as some PD ROMs have these pointing at junk. Need some kind of heuristic for detecting garbage if I'm going to translate them ahead of time by default.
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Thu, 27 Dec 2012 22:48:54 -0800 |
| parents | 60b5c9e2f4e0 |
| children | 1a551a85cb06 |
| 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; 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: | |
| 194 switch(context->cd & 0xF) | |
| 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: | |
| 218 switch(context->cd & 0xF) | |
| 219 { | |
| 220 case VRAM_WRITE: | |
| 221 //Charles MacDonald's VDP doc says that the low byte gets written first | |
| 222 //this doesn't make a lot of sense to me, but until I've had a change to | |
| 223 //verify it myself, I'll assume it's true | |
| 224 if (context->flags & FLAG_DMA_PROG) { | |
| 225 context->vdpmem[context->address ^ 1] = context->dma_val >> 8; | |
| 226 context->flags &= ~FLAG_DMA_PROG; | |
| 227 } else { | |
| 228 context->dma_val = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
| 229 context->vdpmem[context->address] = context->dma_val; | |
| 230 context->flags |= FLAG_DMA_PROG; | |
| 231 } | |
| 232 break; | |
| 233 case CRAM_WRITE: | |
| 234 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 235 break; | |
| 236 case VSRAM_WRITE: | |
| 237 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 238 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 239 } | |
| 240 break; | |
| 241 } | |
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242 break; |
| 75 | 243 //Copy |
| 244 case 0xC0: | |
| 245 if (context->flags & FLAG_DMA_PROG) { | |
| 246 switch(context->cd & 0xF) | |
| 247 { | |
| 248 case VRAM_WRITE: | |
| 249 context->vdpmem[context->address] = context->dma_val; | |
| 250 break; | |
| 251 case CRAM_WRITE: | |
| 252 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 253 break; | |
| 254 case VSRAM_WRITE: | |
| 255 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 256 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 257 } | |
| 258 break; | |
| 259 } | |
| 260 context->flags &= ~FLAG_DMA_PROG; | |
| 261 } else { | |
| 262 //I assume, that DMA copy copies from the same RAM as the destination | |
| 263 //but it's possible I'm mistaken | |
| 264 switch(context->cd & 0xF) | |
| 265 { | |
| 266 case VRAM_WRITE: | |
| 267 context->dma_val = context->vdpmem[(context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]]; | |
| 268 break; | |
| 269 case CRAM_WRITE: | |
| 270 context->dma_val = context->cram[context->regs[REG_DMASRC_L] & (CRAM_SIZE-1)]; | |
| 271 break; | |
| 272 case VSRAM_WRITE: | |
| 273 if ((context->regs[REG_DMASRC_L] & 63) < VSRAM_SIZE) { | |
| 274 context->dma_val = context->vsram[context->regs[REG_DMASRC_L] & 63]; | |
| 275 } else { | |
| 276 context->dma_val = 0; | |
| 277 } | |
| 278 break; | |
| 279 } | |
| 280 context->flags |= FLAG_DMA_PROG; | |
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281 } |
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282 break; |
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283 } |
| 75 | 284 if (!(context->flags & FLAG_DMA_PROG)) { |
| 285 context->address += context->regs[REG_AUTOINC]; | |
| 286 context->regs[REG_DMASRC_L] += 1; | |
| 287 dma_len = ((context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]) - 1; | |
| 288 context->regs[REG_DMALEN_H] = dma_len >> 8; | |
| 289 context->regs[REG_DMALEN_L] = dma_len; | |
| 290 if (!dma_len) { | |
| 291 context->flags &= ~FLAG_DMA_RUN; | |
| 292 } | |
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293 } |
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294 } else { |
| 75 | 295 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
| 296 if (context->fifo_cur != start && start->cycle <= context->cycles) { | |
| 297 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->cd & DMA_START)) { | |
| 298 context->flags |= FLAG_DMA_RUN; | |
| 299 context->dma_val = start->value; | |
| 300 } else { | |
| 301 switch (context->cd & 0xF) | |
| 302 { | |
| 303 case VRAM_WRITE: | |
| 304 if (start->partial) { | |
| 305 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); | |
| 306 context->vdpmem[context->address ^ 1] = start->value; | |
| 307 } else { | |
| 308 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); | |
| 309 context->vdpmem[context->address] = start->value >> 8; | |
| 310 start->partial = 1; | |
| 311 //skip auto-increment and removal of entry from fifo | |
| 312 return; | |
| 313 } | |
| 314 break; | |
| 315 case CRAM_WRITE: | |
|
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316 //printf("CRAM Write: %X to %X\n", start->value, context->address); |
| 75 | 317 context->cram[(context->address/2) & (CRAM_SIZE-1)] = start->value; |
| 318 break; | |
| 319 case VSRAM_WRITE: | |
| 320 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 321 //printf("VSRAM Write: %X to %X\n", start->value, context->address); | |
| 322 context->vsram[(context->address/2) & 63] = start->value; | |
| 323 } | |
| 324 break; | |
| 325 } | |
| 326 context->address += context->regs[REG_AUTOINC]; | |
| 327 } | |
| 328 fifo_entry * cur = start+1; | |
| 329 if (cur < context->fifo_cur) { | |
| 330 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); | |
| 331 } | |
| 332 context->fifo_cur -= 1; | |
| 333 } else { | |
| 334 context->flags |= FLAG_UNUSED_SLOT; | |
| 335 } | |
|
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336 } |
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337 } |
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338 |
| 40 | 339 #define WINDOW_RIGHT 0x80 |
| 340 #define WINDOW_DOWN 0x80 | |
| 341 | |
|
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342 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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343 { |
| 40 | 344 if (!vsram_off) { |
| 345 uint16_t left_col, right_col; | |
| 346 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
|
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347 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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348 right_col = 42; |
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349 } else { |
| 40 | 350 left_col = 0; |
| 351 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
| 352 if (right_col) { | |
| 353 right_col += 2; | |
| 354 } | |
| 355 } | |
|
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356 uint16_t top_line, bottom_line; |
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357 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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358 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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359 bottom_line = 241; |
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360 } else { |
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361 top_line = 0; |
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362 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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363 } |
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364 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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365 uint16_t address = context->regs[REG_WINDOW] << 10; |
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366 uint16_t line_offset, offset, mask; |
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367 if (context->latched_mode & BIT_H40) { |
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368 address &= 0xF000; |
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369 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
|
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370 mask = 0x7F; |
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371 |
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372 } else { |
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373 address &= 0xF800; |
|
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374 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
|
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375 mask = 0x3F; |
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376 } |
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377 offset = address + line_offset + (((column - 2) * 2) & mask); |
|
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378 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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379 //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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380 offset = address + line_offset + (((column - 1) * 2) & mask); |
|
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381 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
|
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382 context->v_offset = (line) & 0x7; |
|
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383 context->flags |= FLAG_WINDOW; |
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384 return; |
| 40 | 385 } |
| 386 context->flags &= ~FLAG_WINDOW; | |
| 387 } | |
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388 uint16_t vscroll; |
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389 switch(context->regs[REG_SCROLL] & 0x30) |
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390 { |
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391 case 0: |
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392 vscroll = 0xFF; |
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393 break; |
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394 case 0x10: |
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395 vscroll = 0x1FF; |
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396 break; |
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397 case 0x20: |
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398 //TODO: Verify this behavior |
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399 vscroll = 0; |
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400 break; |
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401 case 0x30: |
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402 vscroll = 0x3FF; |
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403 break; |
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404 } |
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405 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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406 context->v_offset = vscroll & 0x7; |
|
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407 //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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408 vscroll /= 8; |
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409 uint16_t hscroll_mask; |
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410 uint16_t v_mul; |
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411 switch(context->regs[REG_SCROLL] & 0x3) |
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412 { |
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413 case 0: |
|
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414 hscroll_mask = 0xF0; |
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415 v_mul = 64; |
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416 break; |
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417 case 0x1: |
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418 hscroll_mask = 0x3F; |
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419 v_mul = 128; |
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420 break; |
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421 case 0x2: |
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422 //TODO: Verify this behavior |
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423 hscroll_mask = 0; |
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424 v_mul = 0; |
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425 break; |
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426 case 0x3: |
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427 hscroll_mask = 0x3F0; |
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428 v_mul = 256; |
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429 break; |
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430 } |
| 28 | 431 uint16_t hscroll, offset; |
| 432 for (int i = 0; i < 2; i++) { | |
|
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433 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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434 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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435 //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 | 436 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
| 437 if (i) { | |
| 438 context->col_2 = col_val; | |
| 439 } else { | |
| 440 context->col_1 = col_val; | |
| 441 } | |
| 442 } | |
|
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443 } |
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444 |
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445 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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446 { |
|
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447 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
|
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448 } |
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449 |
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450 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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451 { |
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452 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
|
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453 } |
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454 |
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455 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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456 { |
|
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457 uint16_t address = ((col & 0x7FF) << 5); |
|
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458 if (col & MAP_BIT_V_FLIP) { |
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459 address += 28 - 4 * context->v_offset; |
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460 } else { |
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461 address += 4 * context->v_offset; |
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462 } |
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463 uint16_t pal_priority = (col >> 9) & 0x70; |
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464 int32_t dir; |
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465 if (col & MAP_BIT_H_FLIP) { |
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466 tmp_buf += 7; |
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467 dir = -1; |
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468 } else { |
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469 dir = 1; |
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470 } |
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471 for (uint32_t i=0; i < 4; i++, address++) |
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472 { |
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473 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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474 tmp_buf += dir; |
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475 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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476 tmp_buf += dir; |
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477 } |
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478 } |
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479 |
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480 void render_map_1(vdp_context * context) |
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481 { |
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482 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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483 } |
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484 |
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485 void render_map_2(vdp_context * context) |
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486 { |
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487 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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488 } |
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489 |
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490 void render_map_3(vdp_context * context) |
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491 { |
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492 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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493 } |
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494 |
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495 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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496 { |
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497 if (line >= 240) { |
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498 return; |
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499 } |
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500 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
|
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501 uint16_t *dst, *end; |
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502 uint8_t *sprite_buf, *plane_a, *plane_b; |
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503 if (col) |
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504 { |
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505 col-=2; |
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506 dst = context->framebuf + line * 320 + col * 8; |
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507 sprite_buf = context->linebuf + col * 8; |
|
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|
508 uint16_t a_src; |
| 40 | 509 if (context->flags & FLAG_WINDOW) { |
| 510 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
|
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511 a_src = FBUF_SRC_W; |
| 40 | 512 } else { |
| 513 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
|
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514 a_src = FBUF_SRC_A; |
| 40 | 515 } |
|
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38
diff
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|
516 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
| 30 | 517 end = dst + 16; |
|
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518 uint16_t src; |
| 30 | 519 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
|
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520 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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|
521 uint8_t pixel; |
|
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|
522 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
|
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523 pixel = *sprite_buf; |
|
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|
524 src = FBUF_SRC_S; |
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525 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
|
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|
526 pixel = *plane_a; |
|
43
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|
527 src = a_src; |
|
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20
diff
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|
528 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
|
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diff
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|
529 pixel = *plane_b; |
|
43
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Add debug render mode and fix vertical flip bit for bg tiles
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|
530 src = FBUF_SRC_B; |
|
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parents:
diff
changeset
|
531 } else if (*sprite_buf & 0xF) { |
|
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diff
changeset
|
532 pixel = *sprite_buf; |
|
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Add debug render mode and fix vertical flip bit for bg tiles
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42
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|
533 src = FBUF_SRC_S; |
|
20
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diff
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|
534 } else if (*plane_a & 0xF) { |
|
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diff
changeset
|
535 pixel = *plane_a; |
|
43
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42
diff
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|
536 src = a_src; |
|
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diff
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|
537 } else if (*plane_b & 0xF){ |
|
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diff
changeset
|
538 pixel = *plane_b; |
|
43
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42
diff
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|
539 src = FBUF_SRC_B; |
|
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diff
changeset
|
540 } else { |
|
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diff
changeset
|
541 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
|
43
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42
diff
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|
542 src = FBUF_SRC_BG; |
|
20
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diff
changeset
|
543 } |
|
43
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42
diff
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|
544 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
|
20
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diff
changeset
|
545 } |
|
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diff
changeset
|
546 } else { |
|
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diff
changeset
|
547 //dst = context->framebuf + line * 320; |
|
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diff
changeset
|
548 //sprite_buf = context->linebuf + col * 8; |
|
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diff
changeset
|
549 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
|
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diff
changeset
|
550 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
|
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diff
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|
551 //end = dst + 8; |
|
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diff
changeset
|
552 } |
|
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parents:
diff
changeset
|
553 |
| 40 | 554 uint16_t remaining; |
| 555 if (!(context->flags & FLAG_WINDOW)) { | |
| 556 remaining = context->hscroll_a & 0xF; | |
| 557 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
| 558 } | |
|
39
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Mike Pavone <pavone@retrodev.com>
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38
diff
changeset
|
559 remaining = context->hscroll_b & 0xF; |
|
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
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parents:
38
diff
changeset
|
560 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
|
20
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changeset
|
561 } |
|
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diff
changeset
|
562 |
|
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diff
changeset
|
563 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
|
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parents:
diff
changeset
|
564 case startcyc:\ |
|
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diff
changeset
|
565 read_map_scroll_a(column, line, context);\ |
|
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diff
changeset
|
566 break;\ |
|
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
567 case (startcyc+1):\ |
|
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diff
changeset
|
568 external_slot(context);\ |
|
f664eeb55cb4
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parents:
diff
changeset
|
569 break;\ |
|
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parents:
diff
changeset
|
570 case (startcyc+2):\ |
|
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parents:
diff
changeset
|
571 render_map_1(context);\ |
|
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diff
changeset
|
572 break;\ |
|
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parents:
diff
changeset
|
573 case (startcyc+3):\ |
|
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diff
changeset
|
574 render_map_2(context);\ |
|
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diff
changeset
|
575 break;\ |
|
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parents:
diff
changeset
|
576 case (startcyc+4):\ |
|
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diff
changeset
|
577 read_map_scroll_b(column, line, context);\ |
|
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parents:
diff
changeset
|
578 break;\ |
|
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parents:
diff
changeset
|
579 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 read_sprite_x(line, 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+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 render_map_3(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 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 case startcyc:\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
591 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 case (startcyc+1):\ |
|
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+2):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 render_map_1(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+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 render_map_2(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+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 read_map_scroll_b(column, 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+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 read_sprite_x(line, 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+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 render_map_3(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 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
612 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 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
|
615 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 uint16_t address; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 uint32_t mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
621 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
|
622 context->cur_slot = MAX_DRAWS-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
623 memset(context->linebuf, 0, LINEBUF_SIZE); |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
624 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
626 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 case 2: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 case 3: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
629 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 //sprite attribute table scan starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 case 4: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
633 render_sprite_cells( context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 context->sprite_index = 0x80; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 context->slot_counter = MAX_SPRITES_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 13: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 case 14: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 case 19: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 //!HSYNC asserted |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
655 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 case 22: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
657 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 scan_sprite_table(line, 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 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 26: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 27: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 28: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 case 31: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
671 case 32: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 case 33: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
673 case 34: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
674 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
675 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 case 35: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 mask = 0; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 if (context->regs[REG_MODE_3] & 0x2) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 mask |= 0xF8; |
|
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 if (context->regs[REG_MODE_3] & 0x1) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 mask |= 0x7; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 line &= mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
687 address += line * 4; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
688 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
|
689 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
|
690 //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
|
691 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
692 case 36: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 //!HSYNC high |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 case 37: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 case 38: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
696 case 39: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
697 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
698 scan_sprite_table(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 40: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
701 read_map_scroll_a(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
702 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
703 case 41: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
704 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
705 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
706 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 case 42: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 render_map_1(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
709 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 case 43: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
712 render_map_2(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
713 scan_sprite_table(line, context);//Just a guess |
|
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 44: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
716 read_map_scroll_b(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
717 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
718 case 45: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
719 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
720 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
721 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
722 case 46: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
723 render_map_3(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
724 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
725 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 case 47: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
727 render_map_output(line, 0, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
728 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
729 //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
|
730 //filled rather than the number of available slots |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
731 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
|
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
732 context->cur_slot = MAX_SPRITES_LINE-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
733 context->sprite_draws = MAX_DRAWS; |
|
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
734 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
735 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 COLUMN_RENDER_BLOCK(2, 48) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 COLUMN_RENDER_BLOCK(4, 56) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
738 COLUMN_RENDER_BLOCK(6, 64) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
739 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 COLUMN_RENDER_BLOCK(10, 80) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 COLUMN_RENDER_BLOCK(12, 88) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
742 COLUMN_RENDER_BLOCK(14, 96) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
743 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 COLUMN_RENDER_BLOCK(18, 112) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
745 COLUMN_RENDER_BLOCK(20, 120) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
746 COLUMN_RENDER_BLOCK(22, 128) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
747 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 COLUMN_RENDER_BLOCK(26, 144) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 COLUMN_RENDER_BLOCK(28, 152) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 COLUMN_RENDER_BLOCK(30, 160) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
751 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
752 COLUMN_RENDER_BLOCK(34, 176) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
753 COLUMN_RENDER_BLOCK(36, 184) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
754 COLUMN_RENDER_BLOCK(38, 192) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
755 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
756 case 208: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 case 209: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 external_slot(context); |
|
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 default: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
761 //leftovers from HSYNC clock change nonsense |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
762 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
763 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
764 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
765 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
766 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
|
767 { |
| 37 | 768 uint16_t address; |
| 769 uint32_t mask; | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
770 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
771 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
772 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
773 case 0: |
| 37 | 774 context->cur_slot = MAX_DRAWS_H32-1; |
| 775 memset(context->linebuf, 0, LINEBUF_SIZE); | |
| 776 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
777 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
778 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
779 case 2: |
| 37 | 780 case 3: |
| 781 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
782 break; |
| 37 | 783 //sprite attribute table scan starts |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
784 case 4: |
| 37 | 785 render_sprite_cells( context); |
| 786 context->sprite_index = 0x80; | |
| 787 context->slot_counter = MAX_SPRITES_LINE_H32; | |
| 788 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
789 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
790 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
791 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
792 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
793 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
794 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
795 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
796 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
797 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
798 case 13: |
| 37 | 799 render_sprite_cells(context); |
| 800 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
801 case 14: |
| 37 | 802 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
803 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
804 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
805 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
806 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
807 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
808 case 19: |
| 37 | 809 //HSYNC start |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
810 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
811 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
812 case 22: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
813 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
814 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
815 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
816 case 26: |
| 37 | 817 render_sprite_cells(context); |
| 818 scan_sprite_table(line, 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 27: |
| 37 | 821 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
822 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
823 case 28: |
| 37 | 824 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
| 825 mask = 0; | |
| 826 if (context->regs[REG_MODE_3] & 0x2) { | |
| 827 mask |= 0xF8; | |
| 828 } | |
| 829 if (context->regs[REG_MODE_3] & 0x1) { | |
| 830 mask |= 0x7; | |
| 831 } | |
| 832 line &= mask; | |
| 833 address += line * 4; | |
| 834 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
| 835 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
| 836 //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
|
837 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
838 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
839 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
840 case 31: |
| 37 | 841 case 32: |
| 842 render_sprite_cells(context); | |
| 843 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
844 break; |
| 37 | 845 //!HSYNC high |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
846 case 33: |
| 37 | 847 read_map_scroll_a(0, line, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
848 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
849 case 34: |
| 37 | 850 render_sprite_cells(context); |
| 851 scan_sprite_table(line, context); | |
|
20
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|
852 break; |
|
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
853 case 35: |
| 37 | 854 render_map_1(context); |
| 855 scan_sprite_table(line, context);//Just a guess | |
|
20
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diff
changeset
|
856 break; |
|
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diff
changeset
|
857 case 36: |
| 37 | 858 render_map_2(context); |
| 859 scan_sprite_table(line, context);//Just a guess | |
|
20
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Mostly broken VDP core and savestate viewer
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diff
changeset
|
860 break; |
|
f664eeb55cb4
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diff
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|
861 case 37: |
| 37 | 862 read_map_scroll_b(0, line, context); |
|
20
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Mike Pavone <pavone@retrodev.com>
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diff
changeset
|
863 break; |
|
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Mike Pavone <pavone@retrodev.com>
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diff
changeset
|
864 case 38: |
| 37 | 865 render_sprite_cells(context); |
| 866 scan_sprite_table(line, context); | |
|
20
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diff
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|
867 break; |
|
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Mike Pavone <pavone@retrodev.com>
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diff
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|
868 case 39: |
| 37 | 869 render_map_3(context); |
| 870 scan_sprite_table(line, context);//Just a guess | |
|
20
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diff
changeset
|
871 break; |
|
f664eeb55cb4
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diff
changeset
|
872 case 40: |
| 37 | 873 render_map_output(line, 0, context); |
| 874 scan_sprite_table(line, context);//Just a guess | |
| 875 //reverse context slot counter so it counts the number of sprite slots | |
| 876 //filled rather than the number of available slots | |
| 877 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
| 878 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
| 879 context->sprite_draws = MAX_DRAWS_H32; | |
| 880 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
|
20
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diff
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|
881 break; |
| 37 | 882 COLUMN_RENDER_BLOCK(2, 41) |
| 883 COLUMN_RENDER_BLOCK(4, 49) | |
| 884 COLUMN_RENDER_BLOCK(6, 57) | |
| 885 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
| 886 COLUMN_RENDER_BLOCK(10, 73) | |
| 887 COLUMN_RENDER_BLOCK(12, 81) | |
| 888 COLUMN_RENDER_BLOCK(14, 89) | |
| 889 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
| 890 COLUMN_RENDER_BLOCK(18, 105) | |
| 891 COLUMN_RENDER_BLOCK(20, 113) | |
| 892 COLUMN_RENDER_BLOCK(22, 121) | |
| 893 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
| 894 COLUMN_RENDER_BLOCK(26, 137) | |
| 895 COLUMN_RENDER_BLOCK(28, 145) | |
| 896 COLUMN_RENDER_BLOCK(30, 153) | |
| 897 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
|
20
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diff
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|
898 case 169: |
|
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diff
changeset
|
899 case 170: |
| 37 | 900 external_slot(context); |
|
20
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diff
changeset
|
901 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
902 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
903 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
904 void latch_mode(vdp_context * context) |
|
f664eeb55cb4
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parents:
diff
changeset
|
905 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
906 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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diff
changeset
|
907 } |
|
f664eeb55cb4
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diff
changeset
|
908 |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
909 int is_refresh(vdp_context * context) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
910 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
911 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
912 if (context->latched_mode & BIT_H40) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
913 linecyc = linecyc/16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
914 return (linecyc == 73 || linecyc == 105 || linecyc == 137 || linecyc == 169 || linecyc == 201); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
915 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
916 linecyc = linecyc/20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
917 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>
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43
diff
changeset
|
918 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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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 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
921 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
|
922 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
923 if (line > 0) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
924 line -= 1; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
925 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
|
926 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
|
927 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
|
928 linecyc /= 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
929 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
|
930 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
|
931 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
|
932 end = start + 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
933 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
934 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
935 linecyc /= 20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
936 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
|
937 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
|
938 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
|
939 end = start + 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
940 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
941 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
942 while (start != end) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
943 *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
|
944 ++start; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
945 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
946 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
947 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
948 |
|
20
f664eeb55cb4
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parents:
diff
changeset
|
949 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
|
950 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
951 while(context->cycles < target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
952 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
953 uint32_t line = context->cycles / MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
954 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
|
955 if (!line) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
956 latch_mode(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
957 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
958 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
|
959 //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
|
960 //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
|
961 line = (line - 1) & 0xFF; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
962 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
963 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
964 //Convert to slot number |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
965 if (context->latched_mode & BIT_H40){ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
966 //TODO: Deal with nasty clock switching during HBLANK |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
967 linecyc = linecyc/16; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
968 vdp_h40(line, linecyc, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
969 context->cycles += 16; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
970 } else { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
971 linecyc = linecyc/20; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
972 vdp_h32(line, linecyc, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
973 context->cycles += 20; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
974 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
975 } else { |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
976 if (!is_refresh(context)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
977 external_slot(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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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 (line < active_lines) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
980 check_render_bg(context, line); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
981 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
982 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
|
983 //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
|
984 context->cycles += 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
985 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
986 context->cycles += 20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
987 } |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
988 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
989 } |
|
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990 } |
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991 |
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992 uint32_t vdp_run_to_vblank(vdp_context * context) |
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993 { |
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994 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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995 vdp_run_context(context, target_cycles); |
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996 return context->cycles; |
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997 } |
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998 |
| 75 | 999 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) |
| 1000 { | |
| 1001 for(;;) { | |
| 1002 uint32_t dmalen = (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]; | |
| 1003 if (!dmalen) { | |
| 1004 dmalen = 0x10000; | |
| 1005 } | |
| 1006 uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); | |
| 1007 if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { | |
| 1008 //DMA copies take twice as long to complete since they require a read and a write | |
| 1009 //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word | |
| 1010 min_dma_complete *= 2; | |
| 1011 } | |
| 1012 min_dma_complete += context->cycles; | |
| 1013 if (target_cycles < min_dma_complete) { | |
| 1014 vdp_run_context(context, target_cycles); | |
| 1015 return; | |
| 1016 } else { | |
| 1017 vdp_run_context(context, min_dma_complete); | |
| 1018 if (!(context->flags & FLAG_DMA_RUN)) { | |
| 1019 return; | |
| 1020 } | |
| 1021 } | |
| 1022 } | |
| 1023 } | |
| 1024 | |
| 1025 int vdp_control_port_write(vdp_context * context, uint16_t value) | |
|
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1026 { |
|
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1027 //printf("control port write: %X\n", value); |
|
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1028 if (context->flags & FLAG_PENDING) { |
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1029 context->address = (context->address & 0x3FFF) | (value << 14); |
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1030 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); |
| 75 | 1031 context->flags &= ~FLAG_PENDING; |
|
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1032 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); |
| 75 | 1033 if (context->cd & 0x20) { |
| 1034 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { | |
| 1035 //DMA copy or 68K -> VDP, transfer starts immediately | |
| 1036 context->flags |= FLAG_DMA_RUN; | |
| 1037 if (!(context->regs[REG_DMASRC_H] & 0x80)) { | |
| 1038 return 1; | |
| 1039 } | |
| 1040 } | |
|
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1041 } |
|
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1042 } else { |
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1043 if ((value & 0xC000) == 0x8000) { |
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1044 //Register write |
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1045 uint8_t reg = (value >> 8) & 0x1F; |
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1046 if (reg < VDP_REGS) { |
|
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1047 //printf("register %d set to %X\n", reg, value & 0xFF); |
|
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1048 context->regs[reg] = value; |
|
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1049 /*if (reg == REG_MODE_2) { |
|
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1050 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
|
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1051 }*/ |
|
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1052 } |
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1053 } else { |
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1054 context->flags |= FLAG_PENDING; |
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1055 context->address = (context->address &0xC000) | (value & 0x3FFF); |
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1056 context->cd = (context->cd &0x3C) | (value >> 14); |
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1057 } |
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1058 } |
| 75 | 1059 return 0; |
|
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1060 } |
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1061 |
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1062 void vdp_data_port_write(vdp_context * context, uint16_t value) |
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1063 { |
|
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1064 //printf("data port write: %X\n", value); |
|
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1065 context->flags &= ~FLAG_PENDING; |
|
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1066 if (context->fifo_cur == context->fifo_end) { |
|
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1067 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
|
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1068 } |
|
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1069 while (context->fifo_cur == context->fifo_end) { |
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1070 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1071 } |
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1072 context->fifo_cur->cycle = context->cycles; |
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1073 context->fifo_cur->value = value; |
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1074 context->fifo_cur->partial = 0; |
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1075 context->fifo_cur++; |
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1076 } |
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1077 |
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1078 uint16_t vdp_control_port_read(vdp_context * context) |
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1079 { |
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1080 context->flags &= ~FLAG_PENDING; |
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1081 uint16_t value = 0x3400; |
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1082 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
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1083 value |= 0x200; |
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1084 } |
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1085 if (context->fifo_cur == context->fifo_end) { |
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1086 value |= 0x100; |
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1087 } |
| 75 | 1088 if (context->flags & FLAG_DMA_RUN) { |
| 1089 value |= 0x20; | |
| 1090 } | |
|
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1091 //TODO: Lots of other bits in status port |
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1092 return value; |
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1093 } |
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1094 |
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1095 uint16_t vdp_data_port_read(vdp_context * context) |
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1096 { |
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1097 context->flags &= ~FLAG_PENDING; |
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1098 if (!(context->cd & 1)) { |
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1099 return 0; |
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1100 } |
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1101 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
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1102 context->flags &= ~FLAG_UNUSED_SLOT; |
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1103 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1104 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1105 } |
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1106 uint16_t value = 0; |
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1107 switch (context->cd & 0x7) |
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1108 { |
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1109 case VRAM_READ: |
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1110 value = context->vdpmem[context->address] << 8; |
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1111 context->flags &= ~FLAG_UNUSED_SLOT; |
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1112 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1113 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1114 } |
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1115 value |= context->vdpmem[context->address ^ 1]; |
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1116 break; |
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1117 case CRAM_READ: |
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1118 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
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1119 break; |
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1120 case VSRAM_READ: |
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1121 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
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1122 value = context->vsram[context->address & 63]; |
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1123 } |
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1124 break; |
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1125 } |
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1126 context->address += context->regs[REG_AUTOINC]; |
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1127 return value; |
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1128 } |
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1129 |
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65
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1130 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
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1131 { |
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1132 context->cycles -= deduction; |
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1133 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
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1134 if (start->cycle >= deduction) { |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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1135 start->cycle -= deduction; |
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1136 } else { |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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1137 start->cycle = 0; |
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1138 } |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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1139 } |
|
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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1140 } |
|
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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1141 |
|
20
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1142 #define GST_VDP_REGS 0xFA |
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1143 #define GST_VDP_MEM 0x12478 |
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1144 |
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1145 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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1146 { |
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1147 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1148 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
|
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1149 fread(context->regs, 1, VDP_REGS, state_file); |
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1150 latch_mode(context); |
|
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1151 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
|
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1152 for (int i = 0; i < CRAM_SIZE; i++) { |
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1153 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
|
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1154 } |
|
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1155 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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1156 for (int i = 0; i < VSRAM_SIZE; i++) { |
|
23
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Fix endianness of VSRAM when read from Genecyst save state
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|
1157 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
|
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1158 } |
|
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1159 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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1160 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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1161 } |
|
54
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|
1162 |
|
56
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Fix CRAM and possibly VSRAM writes
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1163 void vdp_save_state(vdp_context * context, FILE * outfile) |
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1164 { |
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1165 uint8_t tmp_buf[CRAM_SIZE*2]; |
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Fix CRAM and possibly VSRAM writes
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1166 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
|
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1167 fwrite(context->regs, 1, VDP_REGS, outfile); |
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Fix CRAM and possibly VSRAM writes
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1168 for (int i = 0; i < CRAM_SIZE; i++) { |
|
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Fix CRAM and possibly VSRAM writes
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1169 tmp_buf[i*2] = context->cram[i]; |
|
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1170 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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1171 } |
|
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|
1172 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
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Fix CRAM and possibly VSRAM writes
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1173 for (int i = 0; i < VSRAM_SIZE; i++) { |
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1174 tmp_buf[i*2] = context->vsram[i]; |
|
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|
1175 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
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1176 } |
|
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|
1177 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
|
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|
1178 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
|
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|
1179 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
|
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Fix CRAM and possibly VSRAM writes
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|
1180 } |
|
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|
1181 |