Mercurial > repos > blastem
annotate vdp.c @ 38:898e3d035f42
Implement sprite index >= sprite limit triggers sprite limit behavior
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 09 Dec 2012 00:03:15 -0800 |
parents | cd59519b26d9 |
children | 3c69319269ef |
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 void init_vdp_context(vdp_context * context) |
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17 { |
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18 memset(context, 0, sizeof(context)); |
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19 context->vdpmem = malloc(VRAM_SIZE); |
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20 context->framebuf = malloc(FRAMEBUF_SIZE); |
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21 context->linebuf = malloc(LINEBUF_SIZE + 48); |
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22 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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23 context->tmp_buf_b = context->tmp_buf_a + 24; |
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24 context->sprite_draws = MAX_DRAWS; |
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25 } |
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26 |
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27 void render_sprite_cells(vdp_context * context) |
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28 { |
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29 if (context->cur_slot >= context->sprite_draws) { |
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30 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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31 |
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32 uint16_t dir; |
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33 int16_t x; |
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34 if (d->h_flip) { |
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35 x = d->x_pos + 7; |
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36 dir = -1; |
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37 } else { |
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38 x = d->x_pos; |
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39 dir = 1; |
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40 } |
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41 //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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42 context->cur_slot--; |
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43 for (uint16_t address = d->address; address < d->address+4; address++) { |
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44 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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45 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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46 } |
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47 x += dir; |
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48 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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49 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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50 } |
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51 x += dir; |
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52 } |
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53 } |
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54 } |
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55 |
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56 void scan_sprite_table(uint32_t line, vdp_context * context) |
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57 { |
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58 if (context->sprite_index && context->slot_counter) { |
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59 line += 1; |
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60 line &= 0xFF; |
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61 context->sprite_index &= 0x7F; |
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62 if (context->latched_mode & BIT_H40) { |
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63 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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64 context->sprite_index = 0; |
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65 return; |
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66 } |
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67 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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68 context->sprite_index = 0; |
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69 return; |
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70 } |
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71 //TODO: Read from SAT cache rather than from VRAM |
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72 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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73 uint16_t address = context->sprite_index * 8 + sat_address; |
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74 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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75 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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76 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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77 if (y <= line && line < (y + height)) { |
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78 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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79 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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80 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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81 context->sprite_info_list[context->slot_counter].y = y; |
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82 } |
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83 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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84 if (context->sprite_index && context->slot_counter) |
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85 { |
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86 address = context->sprite_index * 8 + sat_address; |
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87 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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88 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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89 if (y <= line && line < (y + height)) { |
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90 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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91 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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92 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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93 context->sprite_info_list[context->slot_counter].y = y; |
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94 } |
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95 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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96 } |
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97 } |
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98 } |
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99 |
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100 #define FLAG_DOT_OFLOW 0x1 |
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101 #define FLAG_CAN_MASK 0x2 |
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102 #define FLAG_MASKED 0x4 |
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103 void read_sprite_x(uint32_t line, vdp_context * context) |
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104 { |
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105 if (context->cur_slot >= context->slot_counter) { |
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106 if (context->sprite_draws) { |
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107 line += 1; |
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108 line &= 0xFF; |
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109 //in tiles |
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110 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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111 //in pixels |
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112 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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113 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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114 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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115 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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116 uint8_t row; |
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117 if (tileinfo & MAP_BIT_V_FLIP) { |
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118 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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119 } else { |
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120 row = line-context->sprite_info_list[context->cur_slot].y; |
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121 } |
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122 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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123 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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124 if (x) { |
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125 context->flags |= FLAG_CAN_MASK; |
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126 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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127 context->flags |= FLAG_MASKED; |
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128 } |
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129 |
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130 context->flags &= ~FLAG_DOT_OFLOW; |
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131 int16_t i; |
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132 if (context->flags & FLAG_MASKED) { |
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133 for (i=0; i < width && context->sprite_draws; i++) { |
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134 --context->sprite_draws; |
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135 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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136 } |
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137 } else { |
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138 x -= 128; |
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139 int16_t base_x = x; |
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140 int16_t dir; |
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141 if (tileinfo & MAP_BIT_H_FLIP) { |
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142 x += (width-1) * 8; |
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143 dir = -8; |
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144 } else { |
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145 dir = 8; |
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146 } |
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147 //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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148 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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149 --context->sprite_draws; |
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150 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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151 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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152 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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153 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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154 } |
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155 } |
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156 if (i < width) { |
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157 context->flags |= FLAG_DOT_OFLOW; |
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158 } |
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159 context->cur_slot--; |
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160 } else { |
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161 context->flags |= FLAG_DOT_OFLOW; |
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162 } |
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163 } |
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164 } |
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165 |
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166 void external_slot(vdp_context * context) |
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167 { |
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168 //TODO: Implement me |
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169 } |
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170 |
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171 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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172 { |
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173 uint16_t vscroll; |
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174 switch(context->regs[REG_SCROLL] & 0x30) |
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175 { |
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176 case 0: |
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177 vscroll = 0xFF; |
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178 break; |
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179 case 0x10: |
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180 vscroll = 0x1FF; |
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181 break; |
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182 case 0x20: |
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183 //TODO: Verify this behavior |
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184 vscroll = 0; |
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185 break; |
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186 case 0x30: |
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187 vscroll = 0x3FF; |
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188 break; |
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189 } |
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190 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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191 context->v_offset = vscroll & 0x7; |
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192 //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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193 vscroll /= 8; |
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194 uint16_t hscroll_mask; |
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195 uint16_t v_mul; |
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196 switch(context->regs[REG_SCROLL] & 0x3) |
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197 { |
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198 case 0: |
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199 hscroll_mask = 0xF8; |
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200 v_mul = 64; |
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201 break; |
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202 case 0x1: |
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203 hscroll_mask = 0x1F8; |
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204 v_mul = 128; |
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205 break; |
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206 case 0x2: |
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207 //TODO: Verify this behavior |
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208 hscroll_mask = 0; |
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209 v_mul = 0; |
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210 break; |
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211 case 0x3: |
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212 hscroll_mask = 0x3F8; |
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213 v_mul = 256; |
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214 break; |
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215 } |
28 | 216 uint16_t hscroll, offset; |
217 for (int i = 0; i < 2; i++) { | |
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218 hscroll = ((column - 2 + i) * 8 - hscroll_val) & hscroll_mask; |
28 | 219 offset = address + ((vscroll * v_mul + hscroll/4) & 0x1FFF); |
30 | 220 //printf("%s | line: %d, col: %d, x: %d, hs_mask %X, v_mul: %d, scr reg: %X, tbl addr: %X\n", (vsram_off ? "B" : "A"), line, (column-(2-i)), hscroll, hscroll_mask, v_mul, context->regs[REG_SCROLL], offset); |
28 | 221 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
222 if (i) { | |
223 context->col_2 = col_val; | |
224 } else { | |
225 context->col_1 = col_val; | |
226 } | |
227 } | |
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228 } |
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229 |
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230 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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231 { |
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232 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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233 } |
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234 |
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235 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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236 { |
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237 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
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238 } |
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239 |
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240 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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241 { |
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242 uint16_t address = ((col & 0x3FF) << 5); |
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243 if (col & MAP_BIT_V_FLIP) { |
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244 address += 24 - 4 * context->v_offset; |
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245 } else { |
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246 address += 4 * context->v_offset; |
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247 } |
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248 uint16_t pal_priority = (col >> 9) & 0x70; |
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249 int32_t dir; |
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250 if (col & MAP_BIT_H_FLIP) { |
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251 tmp_buf += 7; |
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252 dir = -1; |
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253 } else { |
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254 dir = 1; |
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255 } |
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256 for (uint32_t i=0; i < 4; i++, address++) |
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257 { |
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258 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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259 tmp_buf += dir; |
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260 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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261 tmp_buf += dir; |
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262 } |
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263 } |
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264 |
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265 void render_map_1(vdp_context * context) |
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266 { |
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267 render_map(context->col_1, context->tmp_buf_a+8, context); |
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268 } |
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269 |
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270 void render_map_2(vdp_context * context) |
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271 { |
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272 render_map(context->col_2, context->tmp_buf_a+16, context); |
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273 } |
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274 |
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275 void render_map_3(vdp_context * context) |
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276 { |
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277 render_map(context->col_1, context->tmp_buf_b+8, context); |
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278 } |
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279 |
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280 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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281 { |
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282 if (line >= 240) { |
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283 return; |
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284 } |
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285 render_map(context->col_2, context->tmp_buf_b+16, context); |
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286 uint16_t *dst, *end; |
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287 uint8_t *sprite_buf, *plane_a, *plane_b; |
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288 if (col) |
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289 { |
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290 col-=2; |
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291 dst = context->framebuf + line * 320 + col * 8; |
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292 sprite_buf = context->linebuf + col * 8; |
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293 plane_a = context->tmp_buf_a + 8 - (context->hscroll_a & 0x7); |
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294 plane_b = context->tmp_buf_b + 8 - (context->hscroll_b & 0x7); |
30 | 295 end = dst + 16; |
296 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); | |
20
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297 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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298 uint8_t pixel; |
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299 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
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300 pixel = *sprite_buf; |
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301 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
20
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302 pixel = *plane_a; |
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303 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
20
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304 pixel = *plane_b; |
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305 } else if (*sprite_buf & 0xF) { |
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306 pixel = *sprite_buf; |
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307 } else if (*plane_a & 0xF) { |
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308 pixel = *plane_a; |
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309 } else if (*plane_b & 0xF){ |
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310 pixel = *plane_b; |
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311 } else { |
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312 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
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313 } |
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314 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? 0x1000 : 0); |
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315 } |
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316 } else { |
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317 //dst = context->framebuf + line * 320; |
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318 //sprite_buf = context->linebuf + col * 8; |
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319 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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320 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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321 //end = dst + 8; |
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322 } |
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323 |
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324 uint16_t remaining = context->hscroll_a & 0x7; |
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325 memcpy(context->tmp_buf_a + 8 - remaining, context->tmp_buf_a + 24 - remaining, remaining); |
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326 remaining = context->hscroll_b & 0x7; |
28 | 327 memcpy(context->tmp_buf_b + 8 - remaining, context->tmp_buf_b + 24 - remaining, remaining); |
20
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328 } |
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329 |
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330 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
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331 case startcyc:\ |
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332 read_map_scroll_a(column, line, context);\ |
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333 break;\ |
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334 case (startcyc+1):\ |
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335 external_slot(context);\ |
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336 break;\ |
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337 case (startcyc+2):\ |
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338 render_map_1(context);\ |
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339 break;\ |
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340 case (startcyc+3):\ |
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341 render_map_2(context);\ |
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342 break;\ |
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343 case (startcyc+4):\ |
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344 read_map_scroll_b(column, line, context);\ |
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345 break;\ |
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346 case (startcyc+5):\ |
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347 read_sprite_x(line, context);\ |
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348 break;\ |
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349 case (startcyc+6):\ |
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350 render_map_3(context);\ |
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351 break;\ |
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352 case (startcyc+7):\ |
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353 render_map_output(line, column, context);\ |
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354 break; |
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355 |
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356 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
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357 case startcyc:\ |
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358 read_map_scroll_a(column, line, context);\ |
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359 break;\ |
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360 case (startcyc+1):\ |
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361 break;\ |
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362 case (startcyc+2):\ |
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|
363 render_map_1(context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
364 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
365 case (startcyc+3):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
366 render_map_2(context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
367 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
368 case (startcyc+4):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
369 read_map_scroll_b(column, line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
370 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
371 case (startcyc+5):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
372 read_sprite_x(line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
373 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
374 case (startcyc+6):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
375 render_map_3(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
376 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
377 case (startcyc+7):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
378 render_map_output(line, column, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
379 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
380 |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
381 void vdp_h40(uint32_t line, uint32_t linecyc, vdp_context * context) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
382 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
383 uint16_t address; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
384 uint32_t mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
385 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
386 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
387 //sprite render to line buffer starts |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
388 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
|
389 context->cur_slot = MAX_DRAWS-1; |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
390 memset(context->linebuf, 0, LINEBUF_SIZE); |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
391 render_sprite_cells(context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
392 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
393 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
394 case 2: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
395 case 3: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
396 render_sprite_cells(context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
397 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
398 //sprite attribute table scan starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
399 case 4: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
400 render_sprite_cells( context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
401 context->sprite_index = 0x80; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
402 context->slot_counter = MAX_SPRITES_LINE; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
403 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
404 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
405 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
406 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
407 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
408 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
409 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
410 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
411 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
412 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
413 case 13: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
414 case 14: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
415 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
416 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
417 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
418 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
419 case 19: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
420 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
421 //!HSYNC asserted |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
422 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
423 case 22: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
424 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
425 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
426 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
427 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
428 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
429 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
430 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
431 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
432 case 26: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
433 case 27: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
434 case 28: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
435 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
436 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
437 case 31: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
438 case 32: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
439 case 33: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
440 case 34: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
441 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
442 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
443 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
444 case 35: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 mask = 0; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
447 if (context->regs[REG_MODE_3] & 0x2) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
448 mask |= 0xF8; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
449 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 if (context->regs[REG_MODE_3] & 0x1) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 mask |= 0x7; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
452 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
453 line &= mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
454 address += line * 4; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
455 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
|
456 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
30 | 457 //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
|
458 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
459 case 36: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
460 //!HSYNC high |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
461 case 37: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
462 case 38: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
463 case 39: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
464 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
467 case 40: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
468 read_map_scroll_a(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
469 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
470 case 41: |
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 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
473 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
474 case 42: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 render_map_1(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
477 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 case 43: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 render_map_2(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 case 44: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 read_map_scroll_b(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 case 45: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
486 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
489 case 46: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
490 render_map_3(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
491 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
492 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 case 47: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 render_map_output(line, 0, context); |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
495 scan_sprite_table(line, context);//Just a guess |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
496 //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
|
497 //filled rather than the number of available slots |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
498 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
499 context->cur_slot = MAX_SPRITES_LINE-1; |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
500 context->sprite_draws = MAX_DRAWS; |
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
501 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
503 COLUMN_RENDER_BLOCK(2, 48) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
504 COLUMN_RENDER_BLOCK(4, 56) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 COLUMN_RENDER_BLOCK(6, 64) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 COLUMN_RENDER_BLOCK(10, 80) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 COLUMN_RENDER_BLOCK(12, 88) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 COLUMN_RENDER_BLOCK(14, 96) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
510 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 COLUMN_RENDER_BLOCK(18, 112) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
512 COLUMN_RENDER_BLOCK(20, 120) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
513 COLUMN_RENDER_BLOCK(22, 128) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
514 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
515 COLUMN_RENDER_BLOCK(26, 144) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 COLUMN_RENDER_BLOCK(28, 152) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
517 COLUMN_RENDER_BLOCK(30, 160) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 COLUMN_RENDER_BLOCK(34, 176) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
520 COLUMN_RENDER_BLOCK(36, 184) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
521 COLUMN_RENDER_BLOCK(38, 192) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
522 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
523 case 208: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
524 case 209: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
525 external_slot(context); |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
526 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
527 default: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
528 //leftovers from HSYNC clock change nonsense |
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 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
531 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
532 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
533 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
|
534 { |
37 | 535 uint16_t address; |
536 uint32_t mask; | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
537 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
538 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
539 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
540 case 0: |
37 | 541 context->cur_slot = MAX_DRAWS_H32-1; |
542 memset(context->linebuf, 0, LINEBUF_SIZE); | |
543 render_sprite_cells(context); | |
20
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 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
546 case 2: |
37 | 547 case 3: |
548 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
549 break; |
37 | 550 //sprite attribute table scan starts |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
551 case 4: |
37 | 552 render_sprite_cells( context); |
553 context->sprite_index = 0x80; | |
554 context->slot_counter = MAX_SPRITES_LINE_H32; | |
555 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
556 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
557 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
558 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
560 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
561 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
562 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 case 13: |
37 | 566 render_sprite_cells(context); |
567 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
568 case 14: |
37 | 569 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
570 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 case 19: |
37 | 576 //HSYNC start |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
579 case 22: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 case 26: |
37 | 584 render_sprite_cells(context); |
585 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 case 27: |
37 | 588 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 case 28: |
37 | 591 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
592 mask = 0; | |
593 if (context->regs[REG_MODE_3] & 0x2) { | |
594 mask |= 0xF8; | |
595 } | |
596 if (context->regs[REG_MODE_3] & 0x1) { | |
597 mask |= 0x7; | |
598 } | |
599 line &= mask; | |
600 address += line * 4; | |
601 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
602 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
603 //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
|
604 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
607 case 31: |
37 | 608 case 32: |
609 render_sprite_cells(context); | |
610 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 break; |
37 | 612 //!HSYNC high |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 case 33: |
37 | 614 read_map_scroll_a(0, line, 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 34: |
37 | 617 render_sprite_cells(context); |
618 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 case 35: |
37 | 621 render_map_1(context); |
622 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
|
623 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 case 36: |
37 | 625 render_map_2(context); |
626 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
|
627 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 case 37: |
37 | 629 read_map_scroll_b(0, line, 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 case 38: |
37 | 632 render_sprite_cells(context); |
633 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 case 39: |
37 | 636 render_map_3(context); |
637 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
|
638 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 40: |
37 | 640 render_map_output(line, 0, context); |
641 scan_sprite_table(line, context);//Just a guess | |
642 //reverse context slot counter so it counts the number of sprite slots | |
643 //filled rather than the number of available slots | |
644 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
645 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
646 context->sprite_draws = MAX_DRAWS_H32; | |
647 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 break; |
37 | 649 COLUMN_RENDER_BLOCK(2, 41) |
650 COLUMN_RENDER_BLOCK(4, 49) | |
651 COLUMN_RENDER_BLOCK(6, 57) | |
652 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
653 COLUMN_RENDER_BLOCK(10, 73) | |
654 COLUMN_RENDER_BLOCK(12, 81) | |
655 COLUMN_RENDER_BLOCK(14, 89) | |
656 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
657 COLUMN_RENDER_BLOCK(18, 105) | |
658 COLUMN_RENDER_BLOCK(20, 113) | |
659 COLUMN_RENDER_BLOCK(22, 121) | |
660 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
661 COLUMN_RENDER_BLOCK(26, 137) | |
662 COLUMN_RENDER_BLOCK(28, 145) | |
663 COLUMN_RENDER_BLOCK(30, 153) | |
664 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 169: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 170: |
37 | 667 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
671 void latch_mode(vdp_context * context) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
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673 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
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674 } |
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675 |
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676 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
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677 { |
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678 while(context->cycles < target_cycles) |
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679 { |
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680 uint32_t line = context->cycles / MCLKS_LINE; |
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681 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
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682 if (line < active_lines) { |
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683 if (!line) { |
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684 latch_mode(context); |
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685 } |
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686 //first sort-of active line is treated as 255 internally |
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687 //it's used for gathering sprite info for line |
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688 line = (line - 1) & 0xFF; |
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689 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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690 |
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691 //Convert to slot number |
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692 if (context->latched_mode & BIT_H40){ |
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693 //TODO: Deal with nasty clock switching during HBLANK |
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694 linecyc = linecyc/16; |
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695 context->cycles += 16; |
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696 vdp_h40(line, linecyc, context); |
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697 } else { |
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698 linecyc = linecyc/20; |
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699 context->cycles += 20; |
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700 vdp_h32(line, linecyc, context); |
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701 } |
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702 } else { |
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703 //TODO: Empty FIFO |
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704 } |
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705 } |
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706 } |
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707 |
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708 uint32_t vdp_run_to_vblank(vdp_context * context) |
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709 { |
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710 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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711 vdp_run_context(context, target_cycles); |
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712 return context->cycles; |
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713 } |
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714 |
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715 #define GST_VDP_REGS 0xFA |
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716 #define GST_VDP_MEM 0x12478 |
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717 |
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718 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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719 { |
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720 uint8_t tmp_buf[CRAM_SIZE*2]; |
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721 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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722 fread(context->regs, 1, VDP_REGS, state_file); |
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723 latch_mode(context); |
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724 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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725 for (int i = 0; i < CRAM_SIZE; i++) { |
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726 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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727 } |
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728 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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729 for (int i = 0; i < VSRAM_SIZE; i++) { |
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730 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
20
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731 } |
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732 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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733 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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734 } |