Mercurial > repos > blastem
annotate vdp.c @ 40:7368a7071908
Broken window support
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 09 Dec 2012 17:05:13 -0800 |
parents | 3c69319269ef |
children | e591004487bc |
rev | line source |
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1 #include "vdp.h" |
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2 #include <stdlib.h> |
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3 #include <string.h> |
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4 |
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5 #define MCLKS_LINE 3420 |
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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 |
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13 #define BIT_PAL 0x8 |
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14 #define BIT_H40 0x1 |
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15 |
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16 #define SCROLL_BUFFER_SIZE 32 |
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17 #define SCROLL_BUFFER_DRAW 16 |
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18 |
40 | 19 #define FLAG_DOT_OFLOW 0x1 |
20 #define FLAG_CAN_MASK 0x2 | |
21 #define FLAG_MASKED 0x4 | |
22 #define FLAG_WINDOW 0x8 | |
23 | |
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24 void init_vdp_context(vdp_context * context) |
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25 { |
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26 memset(context, 0, sizeof(context)); |
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27 context->vdpmem = malloc(VRAM_SIZE); |
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28 context->framebuf = malloc(FRAMEBUF_SIZE); |
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29 context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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30 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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31 context->tmp_buf_b = context->tmp_buf_a + SCROLL_BUFFER_SIZE; |
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32 context->sprite_draws = MAX_DRAWS; |
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33 } |
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34 |
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35 void render_sprite_cells(vdp_context * context) |
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36 { |
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37 if (context->cur_slot >= context->sprite_draws) { |
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38 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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39 |
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40 uint16_t dir; |
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41 int16_t x; |
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42 if (d->h_flip) { |
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43 x = d->x_pos + 7; |
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44 dir = -1; |
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45 } else { |
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46 x = d->x_pos; |
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47 dir = 1; |
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48 } |
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49 //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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50 context->cur_slot--; |
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51 for (uint16_t address = d->address; address < d->address+4; address++) { |
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52 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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53 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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54 } |
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55 x += dir; |
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56 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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57 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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58 } |
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59 x += dir; |
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60 } |
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61 } |
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62 } |
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63 |
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64 void scan_sprite_table(uint32_t line, vdp_context * context) |
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65 { |
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66 if (context->sprite_index && context->slot_counter) { |
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67 line += 1; |
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68 line &= 0xFF; |
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69 context->sprite_index &= 0x7F; |
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70 if (context->latched_mode & BIT_H40) { |
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71 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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72 context->sprite_index = 0; |
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73 return; |
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74 } |
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75 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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76 context->sprite_index = 0; |
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77 return; |
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78 } |
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79 //TODO: Read from SAT cache rather than from VRAM |
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80 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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81 uint16_t address = context->sprite_index * 8 + sat_address; |
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82 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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83 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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84 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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85 if (y <= line && line < (y + height)) { |
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86 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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87 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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88 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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89 context->sprite_info_list[context->slot_counter].y = y; |
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90 } |
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91 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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92 if (context->sprite_index && context->slot_counter) |
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93 { |
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94 address = context->sprite_index * 8 + sat_address; |
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95 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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96 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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97 if (y <= line && line < (y + height)) { |
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98 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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99 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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100 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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101 context->sprite_info_list[context->slot_counter].y = y; |
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102 } |
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103 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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104 } |
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105 } |
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106 } |
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107 |
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108 void read_sprite_x(uint32_t line, vdp_context * context) |
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109 { |
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110 if (context->cur_slot >= context->slot_counter) { |
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111 if (context->sprite_draws) { |
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112 line += 1; |
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113 line &= 0xFF; |
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114 //in tiles |
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115 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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116 //in pixels |
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117 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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118 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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119 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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120 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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121 uint8_t row; |
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122 if (tileinfo & MAP_BIT_V_FLIP) { |
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123 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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124 } else { |
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125 row = line-context->sprite_info_list[context->cur_slot].y; |
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126 } |
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127 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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128 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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129 if (x) { |
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130 context->flags |= FLAG_CAN_MASK; |
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131 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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132 context->flags |= FLAG_MASKED; |
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133 } |
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134 |
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135 context->flags &= ~FLAG_DOT_OFLOW; |
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136 int16_t i; |
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137 if (context->flags & FLAG_MASKED) { |
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138 for (i=0; i < width && context->sprite_draws; i++) { |
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139 --context->sprite_draws; |
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140 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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141 } |
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142 } else { |
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143 x -= 128; |
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144 int16_t base_x = x; |
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145 int16_t dir; |
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146 if (tileinfo & MAP_BIT_H_FLIP) { |
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147 x += (width-1) * 8; |
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148 dir = -8; |
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149 } else { |
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150 dir = 8; |
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151 } |
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152 //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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153 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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154 --context->sprite_draws; |
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155 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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156 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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157 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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158 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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159 } |
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160 } |
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161 if (i < width) { |
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162 context->flags |= FLAG_DOT_OFLOW; |
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163 } |
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164 context->cur_slot--; |
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165 } else { |
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166 context->flags |= FLAG_DOT_OFLOW; |
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167 } |
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168 } |
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169 } |
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170 |
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171 void external_slot(vdp_context * context) |
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172 { |
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173 //TODO: Implement me |
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174 } |
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175 |
40 | 176 #define WINDOW_RIGHT 0x80 |
177 #define WINDOW_DOWN 0x80 | |
178 #define ALWAYS_WINDOW 0 | |
179 | |
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180 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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181 { |
40 | 182 if (!vsram_off) { |
183 uint16_t left_col, right_col; | |
184 #if ALWAYS_WINDOW | |
185 left_col = 0; right_col = 42; | |
186 uint16_t top_line, bottom_line; | |
187 top_line = 0; bottom_line = 241; | |
188 #else | |
189 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
190 left_col = 0; | |
191 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
192 if (right_col) { | |
193 right_col += 2; | |
194 } | |
195 } else { | |
196 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
197 right_col = 42; | |
198 } | |
199 if (column >= left_col && column < right_col) { | |
200 uint16_t top_line, bottom_line; | |
201 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { | |
202 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; | |
203 bottom_line = 241; | |
204 } else { | |
205 top_line = 0; | |
206 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; | |
207 } | |
208 if (line >= top_line && line < bottom_line) { | |
209 #endif | |
210 uint16_t address = context->regs[REG_WINDOW] << 10; | |
211 uint16_t line_offset, offset, mask; | |
212 if (context->latched_mode & BIT_H40) { | |
213 address &= 0xF000; | |
214 line_offset = (((line/* - top_line */) / 8) * 64 * 2) & 0xFFF; | |
215 mask = 0x7F; | |
216 | |
217 } else { | |
218 address &= 0xF800; | |
219 line_offset = (((line/* - top_line*/) / 8) * 32 * 2) & 0xFFF; | |
220 mask = 0x3F; | |
221 } | |
222 offset = address + line_offset + (((column - 2/* - left_col*/) * 2) & mask); | |
223 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; | |
224 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]); | |
225 offset = address + line_offset + (((column - 1/* - left_col*/) * 2) & mask); | |
226 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; | |
227 context->v_offset = (line/* - top_line*/) & 0x7; | |
228 context->flags |= FLAG_WINDOW; | |
229 return; | |
230 #if !ALWAYS_WINDOW | |
231 } | |
232 } | |
233 context->flags &= ~FLAG_WINDOW; | |
234 #endif | |
235 | |
236 } | |
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237 uint16_t vscroll; |
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238 switch(context->regs[REG_SCROLL] & 0x30) |
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239 { |
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240 case 0: |
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241 vscroll = 0xFF; |
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242 break; |
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243 case 0x10: |
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244 vscroll = 0x1FF; |
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245 break; |
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246 case 0x20: |
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247 //TODO: Verify this behavior |
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248 vscroll = 0; |
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249 break; |
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250 case 0x30: |
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251 vscroll = 0x3FF; |
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252 break; |
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253 } |
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254 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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255 context->v_offset = vscroll & 0x7; |
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256 //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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257 vscroll /= 8; |
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258 uint16_t hscroll_mask; |
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259 uint16_t v_mul; |
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260 switch(context->regs[REG_SCROLL] & 0x3) |
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261 { |
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262 case 0: |
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263 hscroll_mask = 0xF0; |
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264 v_mul = 64; |
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265 break; |
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266 case 0x1: |
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267 hscroll_mask = 0x3F; |
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268 v_mul = 128; |
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269 break; |
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270 case 0x2: |
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271 //TODO: Verify this behavior |
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272 hscroll_mask = 0; |
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273 v_mul = 0; |
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274 break; |
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275 case 0x3: |
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276 hscroll_mask = 0x3F0; |
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277 v_mul = 256; |
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278 break; |
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279 } |
28 | 280 uint16_t hscroll, offset; |
281 for (int i = 0; i < 2; i++) { | |
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282 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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283 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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284 //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 | 285 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
286 if (i) { | |
287 context->col_2 = col_val; | |
288 } else { | |
289 context->col_1 = col_val; | |
290 } | |
291 } | |
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292 } |
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293 |
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294 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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295 { |
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296 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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297 } |
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298 |
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299 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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300 { |
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301 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
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302 } |
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303 |
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304 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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305 { |
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306 uint16_t address = ((col & 0x3FF) << 5); |
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307 if (col & MAP_BIT_V_FLIP) { |
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308 address += 24 - 4 * context->v_offset; |
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309 } else { |
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310 address += 4 * context->v_offset; |
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311 } |
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312 uint16_t pal_priority = (col >> 9) & 0x70; |
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313 int32_t dir; |
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314 if (col & MAP_BIT_H_FLIP) { |
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315 tmp_buf += 7; |
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316 dir = -1; |
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317 } else { |
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318 dir = 1; |
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319 } |
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320 for (uint32_t i=0; i < 4; i++, address++) |
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321 { |
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322 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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323 tmp_buf += dir; |
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324 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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325 tmp_buf += dir; |
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326 } |
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327 } |
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328 |
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329 void render_map_1(vdp_context * context) |
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330 { |
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331 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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332 } |
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333 |
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334 void render_map_2(vdp_context * context) |
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335 { |
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336 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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337 } |
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338 |
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339 void render_map_3(vdp_context * context) |
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340 { |
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341 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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342 } |
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343 |
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344 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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345 { |
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346 if (line >= 240) { |
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347 return; |
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348 } |
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349 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
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350 uint16_t *dst, *end; |
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351 uint8_t *sprite_buf, *plane_a, *plane_b; |
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352 if (col) |
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353 { |
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354 col-=2; |
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355 dst = context->framebuf + line * 320 + col * 8; |
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356 sprite_buf = context->linebuf + col * 8; |
40 | 357 if (context->flags & FLAG_WINDOW) { |
358 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
359 } else { | |
360 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
361 } | |
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362 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
30 | 363 end = dst + 16; |
364 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); | |
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365 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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366 uint8_t pixel; |
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367 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
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368 pixel = *sprite_buf; |
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369 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
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370 pixel = *plane_a; |
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371 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
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372 pixel = *plane_b; |
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373 } else if (*sprite_buf & 0xF) { |
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374 pixel = *sprite_buf; |
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375 } else if (*plane_a & 0xF) { |
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376 pixel = *plane_a; |
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377 } else if (*plane_b & 0xF){ |
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378 pixel = *plane_b; |
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379 } else { |
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380 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
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381 } |
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382 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? 0x1000 : 0); |
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383 } |
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384 } else { |
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385 //dst = context->framebuf + line * 320; |
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386 //sprite_buf = context->linebuf + col * 8; |
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387 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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388 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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389 //end = dst + 8; |
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390 } |
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391 |
40 | 392 uint16_t remaining; |
393 if (!(context->flags & FLAG_WINDOW)) { | |
394 remaining = context->hscroll_a & 0xF; | |
395 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
396 } | |
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397 remaining = context->hscroll_b & 0xF; |
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398 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
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399 } |
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400 |
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401 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
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402 case startcyc:\ |
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403 read_map_scroll_a(column, line, context);\ |
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404 break;\ |
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405 case (startcyc+1):\ |
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406 external_slot(context);\ |
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407 break;\ |
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408 case (startcyc+2):\ |
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409 render_map_1(context);\ |
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410 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
411 case (startcyc+3):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
412 render_map_2(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
413 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
414 case (startcyc+4):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
415 read_map_scroll_b(column, line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
416 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
417 case (startcyc+5):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
418 read_sprite_x(line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
419 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
420 case (startcyc+6):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
421 render_map_3(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
422 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
423 case (startcyc+7):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
424 render_map_output(line, column, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
425 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
426 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
427 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
428 case startcyc:\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
429 read_map_scroll_a(column, line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
430 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
431 case (startcyc+1):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
432 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
433 case (startcyc+2):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
434 render_map_1(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
435 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
436 case (startcyc+3):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
437 render_map_2(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
438 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
439 case (startcyc+4):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
440 read_map_scroll_b(column, line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
441 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
442 case (startcyc+5):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
443 read_sprite_x(line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
444 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 case (startcyc+6):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 render_map_3(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
447 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
448 case (startcyc+7):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
449 render_map_output(line, column, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
452 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
|
453 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
454 uint16_t address; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
455 uint32_t mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
456 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
457 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
458 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
459 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
|
460 context->cur_slot = MAX_DRAWS-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
461 memset(context->linebuf, 0, LINEBUF_SIZE); |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
462 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
463 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
464 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 case 2: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 case 3: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
467 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
468 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
469 //sprite attribute table scan starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
470 case 4: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
471 render_sprite_cells( context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
472 context->sprite_index = 0x80; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
473 context->slot_counter = MAX_SPRITES_LINE; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
474 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
477 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 case 13: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 case 14: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
489 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
490 case 19: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
491 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
492 //!HSYNC asserted |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 case 22: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
495 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
496 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
498 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
499 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
500 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
501 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
503 case 26: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
504 case 27: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 case 28: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 case 31: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 case 32: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
510 case 33: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 case 34: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
512 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
513 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
514 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
515 case 35: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
517 mask = 0; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 if (context->regs[REG_MODE_3] & 0x2) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 mask |= 0xF8; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
520 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
521 if (context->regs[REG_MODE_3] & 0x1) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
522 mask |= 0x7; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
523 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
524 line &= mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
525 address += line * 4; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
526 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
|
527 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
39
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
Mike Pavone <pavone@retrodev.com>
parents:
38
diff
changeset
|
528 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
|
529 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
530 case 36: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
531 //!HSYNC high |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
532 case 37: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
533 case 38: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
534 case 39: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
535 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
536 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
537 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
538 case 40: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
539 read_map_scroll_a(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
540 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
541 case 41: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
542 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
543 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
544 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
545 case 42: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
546 render_map_1(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
547 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
548 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
549 case 43: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
550 render_map_2(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
551 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
552 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
553 case 44: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 read_map_scroll_b(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
555 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
556 case 45: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
557 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
558 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
560 case 46: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
561 render_map_3(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
562 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 case 47: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 render_map_output(line, 0, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
566 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
567 //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
|
568 //filled rather than the number of available slots |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
569 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
570 context->cur_slot = MAX_SPRITES_LINE-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 context->sprite_draws = MAX_DRAWS; |
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
572 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 COLUMN_RENDER_BLOCK(2, 48) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 COLUMN_RENDER_BLOCK(4, 56) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 COLUMN_RENDER_BLOCK(6, 64) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 COLUMN_RENDER_BLOCK(10, 80) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
579 COLUMN_RENDER_BLOCK(12, 88) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 COLUMN_RENDER_BLOCK(14, 96) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 COLUMN_RENDER_BLOCK(18, 112) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 COLUMN_RENDER_BLOCK(20, 120) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 COLUMN_RENDER_BLOCK(22, 128) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 COLUMN_RENDER_BLOCK(26, 144) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 COLUMN_RENDER_BLOCK(28, 152) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 COLUMN_RENDER_BLOCK(30, 160) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 COLUMN_RENDER_BLOCK(34, 176) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
591 COLUMN_RENDER_BLOCK(36, 184) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 COLUMN_RENDER_BLOCK(38, 192) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 case 208: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 case 209: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 external_slot(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 default: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 //leftovers from HSYNC clock change nonsense |
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 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 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
|
605 { |
37 | 606 uint16_t address; |
607 uint32_t mask; | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 case 0: |
37 | 612 context->cur_slot = MAX_DRAWS_H32-1; |
613 memset(context->linebuf, 0, LINEBUF_SIZE); | |
614 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 case 2: |
37 | 618 case 3: |
619 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 break; |
37 | 621 //sprite attribute table scan starts |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 case 4: |
37 | 623 render_sprite_cells( context); |
624 context->sprite_index = 0x80; | |
625 context->slot_counter = MAX_SPRITES_LINE_H32; | |
626 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 case 13: |
37 | 637 render_sprite_cells(context); |
638 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 14: |
37 | 640 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 19: |
37 | 647 //HSYNC start |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 22: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 case 26: |
37 | 655 render_sprite_cells(context); |
656 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 case 27: |
37 | 659 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 case 28: |
37 | 662 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
663 mask = 0; | |
664 if (context->regs[REG_MODE_3] & 0x2) { | |
665 mask |= 0xF8; | |
666 } | |
667 if (context->regs[REG_MODE_3] & 0x1) { | |
668 mask |= 0x7; | |
669 } | |
670 line &= mask; | |
671 address += line * 4; | |
672 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
673 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
674 //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
|
675 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 case 31: |
37 | 679 case 32: |
680 render_sprite_cells(context); | |
681 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 break; |
37 | 683 //!HSYNC high |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 case 33: |
37 | 685 read_map_scroll_a(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
687 case 34: |
37 | 688 render_sprite_cells(context); |
689 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
690 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
691 case 35: |
37 | 692 render_map_1(context); |
693 scan_sprite_table(line, context);//Just a guess | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 case 36: |
37 | 696 render_map_2(context); |
697 scan_sprite_table(line, context);//Just a guess | |
20
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698 break; |
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699 case 37: |
37 | 700 read_map_scroll_b(0, line, context); |
20
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701 break; |
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702 case 38: |
37 | 703 render_sprite_cells(context); |
704 scan_sprite_table(line, context); | |
20
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705 break; |
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706 case 39: |
37 | 707 render_map_3(context); |
708 scan_sprite_table(line, context);//Just a guess | |
20
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709 break; |
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710 case 40: |
37 | 711 render_map_output(line, 0, context); |
712 scan_sprite_table(line, context);//Just a guess | |
713 //reverse context slot counter so it counts the number of sprite slots | |
714 //filled rather than the number of available slots | |
715 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
716 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
717 context->sprite_draws = MAX_DRAWS_H32; | |
718 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
20
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719 break; |
37 | 720 COLUMN_RENDER_BLOCK(2, 41) |
721 COLUMN_RENDER_BLOCK(4, 49) | |
722 COLUMN_RENDER_BLOCK(6, 57) | |
723 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
724 COLUMN_RENDER_BLOCK(10, 73) | |
725 COLUMN_RENDER_BLOCK(12, 81) | |
726 COLUMN_RENDER_BLOCK(14, 89) | |
727 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
728 COLUMN_RENDER_BLOCK(18, 105) | |
729 COLUMN_RENDER_BLOCK(20, 113) | |
730 COLUMN_RENDER_BLOCK(22, 121) | |
731 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
732 COLUMN_RENDER_BLOCK(26, 137) | |
733 COLUMN_RENDER_BLOCK(28, 145) | |
734 COLUMN_RENDER_BLOCK(30, 153) | |
735 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
20
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736 case 169: |
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737 case 170: |
37 | 738 external_slot(context); |
20
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739 break; |
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740 } |
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741 } |
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742 void latch_mode(vdp_context * context) |
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743 { |
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744 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
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745 } |
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746 |
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747 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
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748 { |
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749 while(context->cycles < target_cycles) |
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750 { |
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751 uint32_t line = context->cycles / MCLKS_LINE; |
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752 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
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753 if (line < active_lines) { |
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754 if (!line) { |
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parents:
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755 latch_mode(context); |
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756 } |
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757 //first sort-of active line is treated as 255 internally |
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758 //it's used for gathering sprite info for line |
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759 line = (line - 1) & 0xFF; |
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760 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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|
761 |
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changeset
|
762 //Convert to slot number |
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763 if (context->latched_mode & BIT_H40){ |
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764 //TODO: Deal with nasty clock switching during HBLANK |
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765 linecyc = linecyc/16; |
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parents:
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766 context->cycles += 16; |
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767 vdp_h40(line, linecyc, context); |
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parents:
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changeset
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768 } else { |
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769 linecyc = linecyc/20; |
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770 context->cycles += 20; |
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diff
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771 vdp_h32(line, linecyc, context); |
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diff
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|
772 } |
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diff
changeset
|
773 } else { |
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diff
changeset
|
774 //TODO: Empty FIFO |
f664eeb55cb4
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changeset
|
775 } |
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parents:
diff
changeset
|
776 } |
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|
777 } |
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diff
changeset
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778 |
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779 uint32_t vdp_run_to_vblank(vdp_context * context) |
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parents:
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780 { |
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diff
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781 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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782 vdp_run_context(context, target_cycles); |
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783 return context->cycles; |
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diff
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|
784 } |
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785 |
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786 #define GST_VDP_REGS 0xFA |
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787 #define GST_VDP_MEM 0x12478 |
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788 |
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789 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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790 { |
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diff
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791 uint8_t tmp_buf[CRAM_SIZE*2]; |
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792 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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diff
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793 fread(context->regs, 1, VDP_REGS, state_file); |
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parents:
diff
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|
794 latch_mode(context); |
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diff
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795 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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diff
changeset
|
796 for (int i = 0; i < CRAM_SIZE; i++) { |
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parents:
diff
changeset
|
797 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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diff
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|
798 } |
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parents:
diff
changeset
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799 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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diff
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|
800 for (int i = 0; i < VSRAM_SIZE; i++) { |
23
3e924bb56560
Fix endianness of VSRAM when read from Genecyst save state
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parents:
22
diff
changeset
|
801 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
20
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parents:
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|
802 } |
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diff
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|
803 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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parents:
diff
changeset
|
804 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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parents:
diff
changeset
|
805 } |