Mercurial > repos > blastem
annotate vdp.c @ 37:cd59519b26d9
Initial H32 mode support
author | Mike Pavone <pavone@retrodev.com> |
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date | Sat, 08 Dec 2012 23:49:51 -0800 |
parents | 04672c060062 |
children | 898e3d035f42 |
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 //TODO: Read from SAT cache rather than from VRAM |
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63 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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64 uint16_t address = context->sprite_index * 8 + sat_address; |
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65 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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66 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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67 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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68 if (y <= line && line < (y + height)) { |
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69 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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70 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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71 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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72 context->sprite_info_list[context->slot_counter].y = y; |
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73 } |
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74 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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75 if (context->sprite_index && context->slot_counter) |
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76 { |
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77 address = context->sprite_index * 8 + sat_address; |
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78 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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79 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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80 if (y <= line && line < (y + height)) { |
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81 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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82 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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83 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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84 context->sprite_info_list[context->slot_counter].y = y; |
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85 } |
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86 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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87 } |
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88 } |
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89 } |
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90 |
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91 #define FLAG_DOT_OFLOW 0x1 |
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92 #define FLAG_CAN_MASK 0x2 |
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93 #define FLAG_MASKED 0x4 |
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94 void read_sprite_x(uint32_t line, vdp_context * context) |
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95 { |
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96 if (context->cur_slot >= context->slot_counter) { |
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97 if (context->sprite_draws) { |
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98 line += 1; |
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99 line &= 0xFF; |
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100 //in tiles |
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101 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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102 //in pixels |
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103 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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104 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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105 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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106 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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107 uint8_t row; |
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108 if (tileinfo & MAP_BIT_V_FLIP) { |
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109 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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110 } else { |
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111 row = line-context->sprite_info_list[context->cur_slot].y; |
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112 } |
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113 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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114 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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115 if (x) { |
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116 context->flags |= FLAG_CAN_MASK; |
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117 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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118 context->flags |= FLAG_MASKED; |
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119 } |
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120 |
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121 context->flags &= ~FLAG_DOT_OFLOW; |
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122 int16_t i; |
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123 if (context->flags & FLAG_MASKED) { |
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124 for (i=0; i < width && context->sprite_draws; i++) { |
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125 --context->sprite_draws; |
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126 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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127 } |
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128 } else { |
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129 x -= 128; |
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130 int16_t base_x = x; |
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131 int16_t dir; |
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132 if (tileinfo & MAP_BIT_H_FLIP) { |
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133 x += (width-1) * 8; |
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134 dir = -8; |
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135 } else { |
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136 dir = 8; |
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137 } |
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138 //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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139 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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140 --context->sprite_draws; |
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141 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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142 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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143 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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144 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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145 } |
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146 } |
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147 if (i < width) { |
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148 context->flags |= FLAG_DOT_OFLOW; |
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149 } |
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150 context->cur_slot--; |
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151 } else { |
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152 context->flags |= FLAG_DOT_OFLOW; |
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153 } |
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154 } |
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155 } |
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156 |
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157 void external_slot(vdp_context * context) |
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158 { |
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159 //TODO: Implement me |
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160 } |
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161 |
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162 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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163 { |
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164 uint16_t vscroll; |
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165 switch(context->regs[REG_SCROLL] & 0x30) |
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166 { |
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167 case 0: |
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168 vscroll = 0xFF; |
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169 break; |
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170 case 0x10: |
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171 vscroll = 0x1FF; |
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172 break; |
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173 case 0x20: |
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174 //TODO: Verify this behavior |
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175 vscroll = 0; |
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176 break; |
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177 case 0x30: |
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178 vscroll = 0x3FF; |
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179 break; |
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180 } |
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181 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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182 context->v_offset = vscroll & 0x7; |
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183 //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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184 vscroll /= 8; |
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185 uint16_t hscroll_mask; |
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186 uint16_t v_mul; |
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187 switch(context->regs[REG_SCROLL] & 0x3) |
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188 { |
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189 case 0: |
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190 hscroll_mask = 0xF8; |
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191 v_mul = 64; |
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192 break; |
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193 case 0x1: |
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194 hscroll_mask = 0x1F8; |
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195 v_mul = 128; |
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196 break; |
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197 case 0x2: |
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198 //TODO: Verify this behavior |
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199 hscroll_mask = 0; |
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200 v_mul = 0; |
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201 break; |
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202 case 0x3: |
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203 hscroll_mask = 0x3F8; |
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204 v_mul = 256; |
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205 break; |
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206 } |
28 | 207 uint16_t hscroll, offset; |
208 for (int i = 0; i < 2; i++) { | |
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209 hscroll = ((column - 2 + i) * 8 - hscroll_val) & hscroll_mask; |
28 | 210 offset = address + ((vscroll * v_mul + hscroll/4) & 0x1FFF); |
30 | 211 //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 | 212 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
213 if (i) { | |
214 context->col_2 = col_val; | |
215 } else { | |
216 context->col_1 = col_val; | |
217 } | |
218 } | |
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219 } |
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220 |
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221 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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222 { |
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223 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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224 } |
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225 |
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226 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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227 { |
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228 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
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229 } |
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230 |
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231 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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232 { |
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233 uint16_t address = ((col & 0x3FF) << 5); |
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234 if (col & MAP_BIT_V_FLIP) { |
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235 address += 24 - 4 * context->v_offset; |
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236 } else { |
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237 address += 4 * context->v_offset; |
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238 } |
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239 uint16_t pal_priority = (col >> 9) & 0x70; |
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240 int32_t dir; |
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241 if (col & MAP_BIT_H_FLIP) { |
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242 tmp_buf += 7; |
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243 dir = -1; |
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244 } else { |
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245 dir = 1; |
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246 } |
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247 for (uint32_t i=0; i < 4; i++, address++) |
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248 { |
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249 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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250 tmp_buf += dir; |
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251 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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252 tmp_buf += dir; |
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253 } |
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254 } |
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255 |
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256 void render_map_1(vdp_context * context) |
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257 { |
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258 render_map(context->col_1, context->tmp_buf_a+8, context); |
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259 } |
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260 |
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261 void render_map_2(vdp_context * context) |
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262 { |
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263 render_map(context->col_2, context->tmp_buf_a+16, context); |
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264 } |
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265 |
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266 void render_map_3(vdp_context * context) |
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267 { |
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268 render_map(context->col_1, context->tmp_buf_b+8, context); |
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269 } |
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270 |
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271 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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272 { |
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273 if (line >= 240) { |
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274 return; |
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275 } |
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276 render_map(context->col_2, context->tmp_buf_b+16, context); |
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277 uint16_t *dst, *end; |
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278 uint8_t *sprite_buf, *plane_a, *plane_b; |
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279 if (col) |
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280 { |
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281 col-=2; |
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282 dst = context->framebuf + line * 320 + col * 8; |
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283 sprite_buf = context->linebuf + col * 8; |
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284 plane_a = context->tmp_buf_a + 8 - (context->hscroll_a & 0x7); |
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285 plane_b = context->tmp_buf_b + 8 - (context->hscroll_b & 0x7); |
30 | 286 end = dst + 16; |
287 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); | |
20
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288 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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289 uint8_t pixel; |
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290 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
20
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291 pixel = *sprite_buf; |
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292 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
20
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293 pixel = *plane_a; |
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294 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
20
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295 pixel = *plane_b; |
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296 } else if (*sprite_buf & 0xF) { |
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297 pixel = *sprite_buf; |
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298 } else if (*plane_a & 0xF) { |
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299 pixel = *plane_a; |
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300 } else if (*plane_b & 0xF){ |
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301 pixel = *plane_b; |
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302 } else { |
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303 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
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304 } |
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305 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? 0x1000 : 0); |
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306 } |
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307 } else { |
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308 //dst = context->framebuf + line * 320; |
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309 //sprite_buf = context->linebuf + col * 8; |
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310 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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311 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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312 //end = dst + 8; |
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313 } |
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314 |
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315 uint16_t remaining = context->hscroll_a & 0x7; |
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316 memcpy(context->tmp_buf_a + 8 - remaining, context->tmp_buf_a + 24 - remaining, remaining); |
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317 remaining = context->hscroll_b & 0x7; |
28 | 318 memcpy(context->tmp_buf_b + 8 - remaining, context->tmp_buf_b + 24 - remaining, remaining); |
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319 } |
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320 |
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321 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
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322 case startcyc:\ |
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323 read_map_scroll_a(column, line, context);\ |
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324 break;\ |
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325 case (startcyc+1):\ |
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326 external_slot(context);\ |
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327 break;\ |
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328 case (startcyc+2):\ |
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329 render_map_1(context);\ |
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330 break;\ |
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331 case (startcyc+3):\ |
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332 render_map_2(context);\ |
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333 break;\ |
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334 case (startcyc+4):\ |
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335 read_map_scroll_b(column, line, context);\ |
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336 break;\ |
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337 case (startcyc+5):\ |
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338 read_sprite_x(line, context);\ |
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339 break;\ |
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340 case (startcyc+6):\ |
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341 render_map_3(context);\ |
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342 break;\ |
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343 case (startcyc+7):\ |
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344 render_map_output(line, column, context);\ |
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345 break; |
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346 |
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347 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
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348 case startcyc:\ |
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349 read_map_scroll_a(column, line, context);\ |
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350 break;\ |
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351 case (startcyc+1):\ |
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352 break;\ |
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353 case (startcyc+2):\ |
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354 render_map_1(context);\ |
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355 break;\ |
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356 case (startcyc+3):\ |
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357 render_map_2(context);\ |
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358 break;\ |
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359 case (startcyc+4):\ |
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360 read_map_scroll_b(column, line, context);\ |
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361 break;\ |
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362 case (startcyc+5):\ |
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363 read_sprite_x(line, context);\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
364 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
365 case (startcyc+6):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
366 render_map_3(context);\ |
f664eeb55cb4
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+7):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
369 render_map_output(line, column, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
370 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
371 |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
372 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
|
373 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
374 uint16_t address; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
375 uint32_t mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
376 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
377 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
378 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
379 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
|
380 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
|
381 memset(context->linebuf, 0, LINEBUF_SIZE); |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
382 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
383 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
384 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
385 case 2: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
386 case 3: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
387 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
388 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
389 //sprite attribute table scan starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
390 case 4: |
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 context->sprite_index = 0x80; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
393 context->slot_counter = MAX_SPRITES_LINE; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
394 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
395 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
396 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
397 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
398 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
399 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
400 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
401 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
402 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
403 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
404 case 13: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
405 case 14: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
406 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
407 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
408 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
409 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
410 case 19: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
411 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
412 //!HSYNC asserted |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
413 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
414 case 22: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
415 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
416 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
417 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
418 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
419 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
420 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
421 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
422 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
423 case 26: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
424 case 27: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
425 case 28: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
426 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
427 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
428 case 31: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
429 case 32: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
430 case 33: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
431 case 34: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
432 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
433 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
434 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
435 case 35: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
436 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
437 mask = 0; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
438 if (context->regs[REG_MODE_3] & 0x2) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
439 mask |= 0xF8; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
440 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
441 if (context->regs[REG_MODE_3] & 0x1) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
442 mask |= 0x7; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
443 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
444 line &= mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 address += line * 4; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 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
|
447 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
30 | 448 //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
|
449 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 case 36: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 //!HSYNC high |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
452 case 37: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
453 case 38: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
454 case 39: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
455 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
456 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
457 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
458 case 40: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
459 read_map_scroll_a(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
460 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
461 case 41: |
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 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
464 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 case 42: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 render_map_1(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
467 scan_sprite_table(line, context);//Just a guess |
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 case 43: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
470 render_map_2(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
471 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
472 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
473 case 44: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
474 read_map_scroll_b(0, 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 45: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
477 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 case 46: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 render_map_3(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 case 47: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 render_map_output(line, 0, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 //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
|
488 //filled rather than the number of available slots |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
489 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
490 context->cur_slot = MAX_SPRITES_LINE-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
491 context->sprite_draws = MAX_DRAWS; |
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
492 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 COLUMN_RENDER_BLOCK(2, 48) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
495 COLUMN_RENDER_BLOCK(4, 56) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
496 COLUMN_RENDER_BLOCK(6, 64) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
498 COLUMN_RENDER_BLOCK(10, 80) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
499 COLUMN_RENDER_BLOCK(12, 88) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
500 COLUMN_RENDER_BLOCK(14, 96) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
501 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 COLUMN_RENDER_BLOCK(18, 112) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
503 COLUMN_RENDER_BLOCK(20, 120) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
504 COLUMN_RENDER_BLOCK(22, 128) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 COLUMN_RENDER_BLOCK(26, 144) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 COLUMN_RENDER_BLOCK(28, 152) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 COLUMN_RENDER_BLOCK(30, 160) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
510 COLUMN_RENDER_BLOCK(34, 176) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 COLUMN_RENDER_BLOCK(36, 184) |
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parents:
diff
changeset
|
512 COLUMN_RENDER_BLOCK(38, 192) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
513 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
514 case 208: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
515 case 209: |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 external_slot(context); |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
517 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 default: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 //leftovers from HSYNC clock change nonsense |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
520 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
521 } |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
522 } |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
523 |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
524 void vdp_h32(uint32_t line, uint32_t linecyc, vdp_context * context) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
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525 { |
37 | 526 uint16_t address; |
527 uint32_t mask; | |
20
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parents:
diff
changeset
|
528 switch(linecyc) |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
529 { |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
530 //sprite render to line buffer starts |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
531 case 0: |
37 | 532 context->cur_slot = MAX_DRAWS_H32-1; |
533 memset(context->linebuf, 0, LINEBUF_SIZE); | |
534 render_sprite_cells(context); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
535 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
536 case 1: |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
537 case 2: |
37 | 538 case 3: |
539 render_sprite_cells(context); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
540 break; |
37 | 541 //sprite attribute table scan starts |
20
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parents:
diff
changeset
|
542 case 4: |
37 | 543 render_sprite_cells( context); |
544 context->sprite_index = 0x80; | |
545 context->slot_counter = MAX_SPRITES_LINE_H32; | |
546 scan_sprite_table(line, context); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
547 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
548 case 5: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
549 case 6: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
550 case 7: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
551 case 8: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
552 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
553 case 10: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 case 11: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
555 case 12: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
556 case 13: |
37 | 557 render_sprite_cells(context); |
558 scan_sprite_table(line, context); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 case 14: |
37 | 560 external_slot(context); |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
561 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
562 case 15: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 case 16: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 case 17: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 case 18: |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
566 case 19: |
37 | 567 //HSYNC start |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
568 case 20: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
569 case 21: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
570 case 22: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 case 23: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 case 24: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 case 25: |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 case 26: |
37 | 575 render_sprite_cells(context); |
576 scan_sprite_table(line, context); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 case 27: |
37 | 579 external_slot(context); |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 case 28: |
37 | 582 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
583 mask = 0; | |
584 if (context->regs[REG_MODE_3] & 0x2) { | |
585 mask |= 0xF8; | |
586 } | |
587 if (context->regs[REG_MODE_3] & 0x1) { | |
588 mask |= 0x7; | |
589 } | |
590 line &= mask; | |
591 address += line * 4; | |
592 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
593 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
594 //printf("%d: HScroll A: %d, HScroll B: %d\n", line, context->hscroll_a, context->hscroll_b); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 case 30: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
598 case 31: |
37 | 599 case 32: |
600 render_sprite_cells(context); | |
601 scan_sprite_table(line, context); | |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 break; |
37 | 603 //!HSYNC high |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 case 33: |
37 | 605 read_map_scroll_a(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
607 case 34: |
37 | 608 render_sprite_cells(context); |
609 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 case 35: |
37 | 612 render_map_1(context); |
613 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
|
614 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 case 36: |
37 | 616 render_map_2(context); |
617 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
|
618 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 case 37: |
37 | 620 read_map_scroll_b(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
621 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 case 38: |
37 | 623 render_sprite_cells(context); |
624 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
626 case 39: |
37 | 627 render_map_3(context); |
628 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
|
629 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 case 40: |
37 | 631 render_map_output(line, 0, context); |
632 scan_sprite_table(line, context);//Just a guess | |
633 //reverse context slot counter so it counts the number of sprite slots | |
634 //filled rather than the number of available slots | |
635 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
636 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
637 context->sprite_draws = MAX_DRAWS_H32; | |
638 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 break; |
37 | 640 COLUMN_RENDER_BLOCK(2, 41) |
641 COLUMN_RENDER_BLOCK(4, 49) | |
642 COLUMN_RENDER_BLOCK(6, 57) | |
643 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
644 COLUMN_RENDER_BLOCK(10, 73) | |
645 COLUMN_RENDER_BLOCK(12, 81) | |
646 COLUMN_RENDER_BLOCK(14, 89) | |
647 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
648 COLUMN_RENDER_BLOCK(18, 105) | |
649 COLUMN_RENDER_BLOCK(20, 113) | |
650 COLUMN_RENDER_BLOCK(22, 121) | |
651 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
652 COLUMN_RENDER_BLOCK(26, 137) | |
653 COLUMN_RENDER_BLOCK(28, 145) | |
654 COLUMN_RENDER_BLOCK(30, 153) | |
655 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 case 169: |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 case 170: |
37 | 658 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 void latch_mode(vdp_context * context) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 while(context->cycles < target_cycles) |
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 uint32_t line = context->cycles / MCLKS_LINE; |
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
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673 if (line < active_lines) { |
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674 if (!line) { |
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675 latch_mode(context); |
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676 } |
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677 //first sort-of active line is treated as 255 internally |
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678 //it's used for gathering sprite info for line |
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679 line = (line - 1) & 0xFF; |
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680 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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681 |
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682 //Convert to slot number |
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683 if (context->latched_mode & BIT_H40){ |
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684 //TODO: Deal with nasty clock switching during HBLANK |
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685 linecyc = linecyc/16; |
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686 context->cycles += 16; |
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687 vdp_h40(line, linecyc, context); |
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688 } else { |
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689 linecyc = linecyc/20; |
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690 context->cycles += 20; |
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691 vdp_h32(line, linecyc, context); |
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692 } |
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693 } else { |
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694 //TODO: Empty FIFO |
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695 } |
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696 } |
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697 } |
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698 |
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699 uint32_t vdp_run_to_vblank(vdp_context * context) |
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700 { |
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701 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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702 vdp_run_context(context, target_cycles); |
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703 return context->cycles; |
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704 } |
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705 |
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706 #define GST_VDP_REGS 0xFA |
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707 #define GST_VDP_MEM 0x12478 |
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708 |
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709 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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710 { |
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711 uint8_t tmp_buf[CRAM_SIZE*2]; |
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712 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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713 fread(context->regs, 1, VDP_REGS, state_file); |
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714 latch_mode(context); |
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715 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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716 for (int i = 0; i < CRAM_SIZE; i++) { |
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717 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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718 } |
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719 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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720 for (int i = 0; i < VSRAM_SIZE; i++) { |
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721 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
20
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722 } |
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723 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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724 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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725 } |