Mercurial > repos > blastem
annotate vdp.c @ 39:3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 09 Dec 2012 01:13:41 -0800 |
parents | 898e3d035f42 |
children | 7368a7071908 |
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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Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
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16 #define SCROLL_BUFFER_SIZE 32 |
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17 #define SCROLL_BUFFER_DRAW 16 |
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18 |
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19 void init_vdp_context(vdp_context * context) |
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20 { |
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21 memset(context, 0, sizeof(context)); |
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22 context->vdpmem = malloc(VRAM_SIZE); |
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23 context->framebuf = malloc(FRAMEBUF_SIZE); |
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24 context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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25 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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26 context->tmp_buf_b = context->tmp_buf_a + SCROLL_BUFFER_SIZE; |
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27 context->sprite_draws = MAX_DRAWS; |
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28 } |
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29 |
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30 void render_sprite_cells(vdp_context * context) |
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31 { |
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32 if (context->cur_slot >= context->sprite_draws) { |
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33 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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34 |
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35 uint16_t dir; |
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36 int16_t x; |
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37 if (d->h_flip) { |
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38 x = d->x_pos + 7; |
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39 dir = -1; |
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40 } else { |
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41 x = d->x_pos; |
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42 dir = 1; |
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43 } |
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44 //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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45 context->cur_slot--; |
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46 for (uint16_t address = d->address; address < d->address+4; address++) { |
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47 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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48 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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49 } |
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50 x += dir; |
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51 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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52 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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53 } |
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54 x += dir; |
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55 } |
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56 } |
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57 } |
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58 |
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59 void scan_sprite_table(uint32_t line, vdp_context * context) |
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60 { |
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61 if (context->sprite_index && context->slot_counter) { |
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62 line += 1; |
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63 line &= 0xFF; |
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64 context->sprite_index &= 0x7F; |
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65 if (context->latched_mode & BIT_H40) { |
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66 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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67 context->sprite_index = 0; |
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68 return; |
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69 } |
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70 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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71 context->sprite_index = 0; |
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72 return; |
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73 } |
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74 //TODO: Read from SAT cache rather than from VRAM |
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75 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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76 uint16_t address = context->sprite_index * 8 + sat_address; |
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77 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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78 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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79 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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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 if (context->sprite_index && context->slot_counter) |
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88 { |
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89 address = context->sprite_index * 8 + sat_address; |
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90 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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91 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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92 if (y <= line && line < (y + height)) { |
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93 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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94 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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95 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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96 context->sprite_info_list[context->slot_counter].y = y; |
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97 } |
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98 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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99 } |
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100 } |
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101 } |
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102 |
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103 #define FLAG_DOT_OFLOW 0x1 |
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104 #define FLAG_CAN_MASK 0x2 |
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105 #define FLAG_MASKED 0x4 |
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106 void read_sprite_x(uint32_t line, vdp_context * context) |
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107 { |
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108 if (context->cur_slot >= context->slot_counter) { |
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109 if (context->sprite_draws) { |
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110 line += 1; |
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111 line &= 0xFF; |
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112 //in tiles |
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113 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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114 //in pixels |
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115 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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116 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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117 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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118 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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119 uint8_t row; |
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120 if (tileinfo & MAP_BIT_V_FLIP) { |
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121 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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122 } else { |
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123 row = line-context->sprite_info_list[context->cur_slot].y; |
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124 } |
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125 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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126 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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127 if (x) { |
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128 context->flags |= FLAG_CAN_MASK; |
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129 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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130 context->flags |= FLAG_MASKED; |
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131 } |
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132 |
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133 context->flags &= ~FLAG_DOT_OFLOW; |
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134 int16_t i; |
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135 if (context->flags & FLAG_MASKED) { |
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136 for (i=0; i < width && context->sprite_draws; i++) { |
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137 --context->sprite_draws; |
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138 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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139 } |
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140 } else { |
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141 x -= 128; |
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142 int16_t base_x = x; |
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143 int16_t dir; |
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144 if (tileinfo & MAP_BIT_H_FLIP) { |
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145 x += (width-1) * 8; |
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146 dir = -8; |
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147 } else { |
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148 dir = 8; |
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149 } |
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150 //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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151 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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152 --context->sprite_draws; |
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153 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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154 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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155 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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156 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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157 } |
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158 } |
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159 if (i < width) { |
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160 context->flags |= FLAG_DOT_OFLOW; |
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161 } |
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162 context->cur_slot--; |
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163 } else { |
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164 context->flags |= FLAG_DOT_OFLOW; |
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165 } |
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166 } |
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167 } |
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168 |
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169 void external_slot(vdp_context * context) |
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170 { |
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171 //TODO: Implement me |
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172 } |
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173 |
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174 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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175 { |
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176 uint16_t vscroll; |
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177 switch(context->regs[REG_SCROLL] & 0x30) |
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178 { |
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179 case 0: |
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180 vscroll = 0xFF; |
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181 break; |
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182 case 0x10: |
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183 vscroll = 0x1FF; |
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184 break; |
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185 case 0x20: |
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186 //TODO: Verify this behavior |
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187 vscroll = 0; |
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188 break; |
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189 case 0x30: |
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190 vscroll = 0x3FF; |
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191 break; |
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192 } |
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193 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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194 context->v_offset = vscroll & 0x7; |
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195 //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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196 vscroll /= 8; |
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197 uint16_t hscroll_mask; |
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198 uint16_t v_mul; |
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199 switch(context->regs[REG_SCROLL] & 0x3) |
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200 { |
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201 case 0: |
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202 hscroll_mask = 0xF0; |
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203 v_mul = 64; |
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204 break; |
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205 case 0x1: |
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206 hscroll_mask = 0x3F; |
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207 v_mul = 128; |
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208 break; |
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209 case 0x2: |
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210 //TODO: Verify this behavior |
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211 hscroll_mask = 0; |
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212 v_mul = 0; |
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213 break; |
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214 case 0x3: |
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215 hscroll_mask = 0x3F0; |
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216 v_mul = 256; |
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217 break; |
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218 } |
28 | 219 uint16_t hscroll, offset; |
220 for (int i = 0; i < 2; i++) { | |
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221 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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222 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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223 //printf("%s | line: %d, col: %d, x: %d, hs_mask %X, scr reg: %X, tbl addr: %X\n", (vsram_off ? "B" : "A"), line, (column-2+i), hscroll, hscroll_mask, context->regs[REG_SCROLL], offset); |
28 | 224 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
225 if (i) { | |
226 context->col_2 = col_val; | |
227 } else { | |
228 context->col_1 = col_val; | |
229 } | |
230 } | |
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231 } |
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232 |
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233 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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234 { |
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235 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
20
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236 } |
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237 |
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238 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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239 { |
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240 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
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241 } |
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242 |
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243 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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244 { |
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245 uint16_t address = ((col & 0x3FF) << 5); |
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246 if (col & MAP_BIT_V_FLIP) { |
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247 address += 24 - 4 * context->v_offset; |
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248 } else { |
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249 address += 4 * context->v_offset; |
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250 } |
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251 uint16_t pal_priority = (col >> 9) & 0x70; |
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252 int32_t dir; |
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253 if (col & MAP_BIT_H_FLIP) { |
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254 tmp_buf += 7; |
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255 dir = -1; |
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256 } else { |
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257 dir = 1; |
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258 } |
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259 for (uint32_t i=0; i < 4; i++, address++) |
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260 { |
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261 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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262 tmp_buf += dir; |
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263 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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264 tmp_buf += dir; |
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265 } |
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266 } |
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267 |
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268 void render_map_1(vdp_context * context) |
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269 { |
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270 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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271 } |
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272 |
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273 void render_map_2(vdp_context * context) |
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274 { |
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275 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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276 } |
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277 |
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278 void render_map_3(vdp_context * context) |
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279 { |
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280 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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281 } |
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282 |
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283 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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284 { |
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285 if (line >= 240) { |
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286 return; |
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287 } |
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288 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
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289 uint16_t *dst, *end; |
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290 uint8_t *sprite_buf, *plane_a, *plane_b; |
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291 if (col) |
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292 { |
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293 col-=2; |
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294 dst = context->framebuf + line * 320 + col * 8; |
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295 sprite_buf = context->linebuf + col * 8; |
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296 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); |
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297 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
30 | 298 end = dst + 16; |
299 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); | |
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300 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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301 uint8_t pixel; |
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302 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
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303 pixel = *sprite_buf; |
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304 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
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305 pixel = *plane_a; |
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306 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
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307 pixel = *plane_b; |
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308 } else if (*sprite_buf & 0xF) { |
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309 pixel = *sprite_buf; |
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310 } else if (*plane_a & 0xF) { |
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311 pixel = *plane_a; |
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312 } else if (*plane_b & 0xF){ |
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313 pixel = *plane_b; |
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314 } else { |
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315 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
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316 } |
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317 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? 0x1000 : 0); |
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318 } |
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319 } else { |
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320 //dst = context->framebuf + line * 320; |
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321 //sprite_buf = context->linebuf + col * 8; |
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322 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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323 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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324 //end = dst + 8; |
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325 } |
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326 |
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327 uint16_t remaining = context->hscroll_a & 0xF; |
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328 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); |
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329 remaining = context->hscroll_b & 0xF; |
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330 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
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331 } |
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332 |
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333 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
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334 case startcyc:\ |
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335 read_map_scroll_a(column, line, context);\ |
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336 break;\ |
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337 case (startcyc+1):\ |
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338 external_slot(context);\ |
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339 break;\ |
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340 case (startcyc+2):\ |
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341 render_map_1(context);\ |
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342 break;\ |
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343 case (startcyc+3):\ |
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344 render_map_2(context);\ |
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345 break;\ |
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346 case (startcyc+4):\ |
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347 read_map_scroll_b(column, line, context);\ |
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348 break;\ |
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349 case (startcyc+5):\ |
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350 read_sprite_x(line, context);\ |
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351 break;\ |
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352 case (startcyc+6):\ |
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353 render_map_3(context);\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
354 break;\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
355 case (startcyc+7):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
356 render_map_output(line, column, context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
357 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
358 |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
359 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
360 case startcyc:\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
361 read_map_scroll_a(column, line, context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
362 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
363 case (startcyc+1):\ |
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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+2):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
366 render_map_1(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+3):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
369 render_map_2(context);\ |
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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+4):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
372 read_map_scroll_b(column, line, context);\ |
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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+5):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
375 read_sprite_x(line, context);\ |
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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+6):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
378 render_map_3(context);\ |
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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 case (startcyc+7):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
381 render_map_output(line, column, context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
382 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
383 |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
384 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
|
385 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
386 uint16_t address; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
387 uint32_t mask; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
388 switch(linecyc) |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
389 { |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
390 //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
|
391 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
|
392 context->cur_slot = MAX_DRAWS-1; |
20
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
393 memset(context->linebuf, 0, LINEBUF_SIZE); |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
394 render_sprite_cells(context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
395 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
396 case 1: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
397 case 2: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
398 case 3: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
399 render_sprite_cells(context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
400 break; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
401 //sprite attribute table scan starts |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
402 case 4: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
403 render_sprite_cells( context); |
20
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
404 context->sprite_index = 0x80; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
405 context->slot_counter = MAX_SPRITES_LINE; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
406 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
407 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
408 case 5: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
409 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
410 case 7: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
411 case 8: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
412 case 9: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
413 case 10: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
414 case 11: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
415 case 12: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
416 case 13: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
417 case 14: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
418 case 15: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
419 case 16: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
420 case 17: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
421 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
422 case 19: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
423 case 20: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
424 //!HSYNC asserted |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
425 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
426 case 22: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
427 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
428 scan_sprite_table(line, 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 23: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
431 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
432 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
433 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
434 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
435 case 26: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
436 case 27: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
437 case 28: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
438 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
439 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
440 case 31: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
441 case 32: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
442 case 33: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
443 case 34: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
444 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
447 case 35: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
448 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
449 mask = 0; |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 if (context->regs[REG_MODE_3] & 0x2) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 mask |= 0xF8; |
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 if (context->regs[REG_MODE_3] & 0x1) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
454 mask |= 0x7; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
455 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
456 line &= mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
457 address += line * 4; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
458 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
|
459 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
39
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
Mike Pavone <pavone@retrodev.com>
parents:
38
diff
changeset
|
460 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
|
461 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
462 case 36: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
463 //!HSYNC high |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
464 case 37: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 case 38: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 case 39: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
467 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
468 scan_sprite_table(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 40: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
471 read_map_scroll_a(0, line, context); |
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 41: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
474 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
477 case 42: |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 render_map_1(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 case 43: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 render_map_2(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 scan_sprite_table(line, context);//Just a guess |
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 44: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 read_map_scroll_b(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 case 45: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
489 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
490 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
491 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
492 case 46: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 render_map_3(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
495 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
496 case 47: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 render_map_output(line, 0, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
498 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
499 //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
|
500 //filled rather than the number of available slots |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
501 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
502 context->cur_slot = MAX_SPRITES_LINE-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
503 context->sprite_draws = MAX_DRAWS; |
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
504 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 COLUMN_RENDER_BLOCK(2, 48) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 COLUMN_RENDER_BLOCK(4, 56) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 COLUMN_RENDER_BLOCK(6, 64) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
510 COLUMN_RENDER_BLOCK(10, 80) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 COLUMN_RENDER_BLOCK(12, 88) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
512 COLUMN_RENDER_BLOCK(14, 96) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
513 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
514 COLUMN_RENDER_BLOCK(18, 112) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
515 COLUMN_RENDER_BLOCK(20, 120) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 COLUMN_RENDER_BLOCK(22, 128) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
517 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 COLUMN_RENDER_BLOCK(26, 144) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 COLUMN_RENDER_BLOCK(28, 152) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
520 COLUMN_RENDER_BLOCK(30, 160) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
521 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
522 COLUMN_RENDER_BLOCK(34, 176) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
523 COLUMN_RENDER_BLOCK(36, 184) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
524 COLUMN_RENDER_BLOCK(38, 192) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
525 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
526 case 208: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
527 case 209: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
528 external_slot(context); |
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 default: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
531 //leftovers from HSYNC clock change nonsense |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
532 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
533 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
534 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
535 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
536 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
|
537 { |
37 | 538 uint16_t address; |
539 uint32_t mask; | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
540 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
541 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
542 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
543 case 0: |
37 | 544 context->cur_slot = MAX_DRAWS_H32-1; |
545 memset(context->linebuf, 0, LINEBUF_SIZE); | |
546 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
547 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
548 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
549 case 2: |
37 | 550 case 3: |
551 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
552 break; |
37 | 553 //sprite attribute table scan starts |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 case 4: |
37 | 555 render_sprite_cells( context); |
556 context->sprite_index = 0x80; | |
557 context->slot_counter = MAX_SPRITES_LINE_H32; | |
558 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
560 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
561 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
562 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
566 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
567 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
568 case 13: |
37 | 569 render_sprite_cells(context); |
570 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 case 14: |
37 | 572 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 case 19: |
37 | 579 //HSYNC start |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 case 22: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 case 26: |
37 | 587 render_sprite_cells(context); |
588 scan_sprite_table(line, 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 27: |
37 | 591 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 case 28: |
37 | 594 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
595 mask = 0; | |
596 if (context->regs[REG_MODE_3] & 0x2) { | |
597 mask |= 0xF8; | |
598 } | |
599 if (context->regs[REG_MODE_3] & 0x1) { | |
600 mask |= 0x7; | |
601 } | |
602 line &= mask; | |
603 address += line * 4; | |
604 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
605 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
606 //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
|
607 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 case 31: |
37 | 611 case 32: |
612 render_sprite_cells(context); | |
613 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 break; |
37 | 615 //!HSYNC high |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 case 33: |
37 | 617 read_map_scroll_a(0, line, context); |
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 34: |
37 | 620 render_sprite_cells(context); |
621 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
623 case 35: |
37 | 624 render_map_1(context); |
625 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
|
626 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 case 36: |
37 | 628 render_map_2(context); |
629 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
|
630 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 case 37: |
37 | 632 read_map_scroll_b(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 case 38: |
37 | 635 render_sprite_cells(context); |
636 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 case 39: |
37 | 639 render_map_3(context); |
640 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
|
641 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 40: |
37 | 643 render_map_output(line, 0, context); |
644 scan_sprite_table(line, context);//Just a guess | |
645 //reverse context slot counter so it counts the number of sprite slots | |
646 //filled rather than the number of available slots | |
647 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
648 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
649 context->sprite_draws = MAX_DRAWS_H32; | |
650 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
20
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651 break; |
37 | 652 COLUMN_RENDER_BLOCK(2, 41) |
653 COLUMN_RENDER_BLOCK(4, 49) | |
654 COLUMN_RENDER_BLOCK(6, 57) | |
655 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
656 COLUMN_RENDER_BLOCK(10, 73) | |
657 COLUMN_RENDER_BLOCK(12, 81) | |
658 COLUMN_RENDER_BLOCK(14, 89) | |
659 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
660 COLUMN_RENDER_BLOCK(18, 105) | |
661 COLUMN_RENDER_BLOCK(20, 113) | |
662 COLUMN_RENDER_BLOCK(22, 121) | |
663 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
664 COLUMN_RENDER_BLOCK(26, 137) | |
665 COLUMN_RENDER_BLOCK(28, 145) | |
666 COLUMN_RENDER_BLOCK(30, 153) | |
667 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
20
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668 case 169: |
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669 case 170: |
37 | 670 external_slot(context); |
20
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671 break; |
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672 } |
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673 } |
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674 void latch_mode(vdp_context * context) |
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675 { |
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676 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
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677 } |
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678 |
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679 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
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680 { |
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681 while(context->cycles < target_cycles) |
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682 { |
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683 uint32_t line = context->cycles / MCLKS_LINE; |
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684 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
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685 if (line < active_lines) { |
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686 if (!line) { |
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687 latch_mode(context); |
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688 } |
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689 //first sort-of active line is treated as 255 internally |
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690 //it's used for gathering sprite info for line |
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691 line = (line - 1) & 0xFF; |
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692 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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693 |
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694 //Convert to slot number |
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695 if (context->latched_mode & BIT_H40){ |
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696 //TODO: Deal with nasty clock switching during HBLANK |
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697 linecyc = linecyc/16; |
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698 context->cycles += 16; |
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699 vdp_h40(line, linecyc, context); |
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700 } else { |
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701 linecyc = linecyc/20; |
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702 context->cycles += 20; |
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703 vdp_h32(line, linecyc, context); |
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704 } |
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705 } else { |
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706 //TODO: Empty FIFO |
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707 } |
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708 } |
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709 } |
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710 |
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711 uint32_t vdp_run_to_vblank(vdp_context * context) |
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712 { |
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713 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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714 vdp_run_context(context, target_cycles); |
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715 return context->cycles; |
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716 } |
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717 |
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718 #define GST_VDP_REGS 0xFA |
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719 #define GST_VDP_MEM 0x12478 |
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720 |
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721 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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722 { |
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723 uint8_t tmp_buf[CRAM_SIZE*2]; |
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724 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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725 fread(context->regs, 1, VDP_REGS, state_file); |
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726 latch_mode(context); |
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727 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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728 for (int i = 0; i < CRAM_SIZE; i++) { |
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729 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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730 } |
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731 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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732 for (int i = 0; i < VSRAM_SIZE; i++) { |
23
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733 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
20
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734 } |
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735 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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736 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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737 } |