Mercurial > repos > blastem
annotate vdp.c @ 131:8fc8e46be691
Fix bug that was causing DMA fills to lock up under certain circumstances
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 30 Dec 2012 01:15:16 -0800 |
parents | 004dd46e0a97 |
children | a81c548cf353 |
rev | line source |
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1 #include "vdp.h" |
75 | 2 #include "blastem.h" |
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3 #include <stdlib.h> |
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4 #include <string.h> |
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5 |
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6 #define NTSC_ACTIVE 225 |
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7 #define PAL_ACTIVE 241 |
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8 #define BUF_BIT_PRIORITY 0x40 |
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9 #define MAP_BIT_PRIORITY 0x8000 |
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10 #define MAP_BIT_H_FLIP 0x800 |
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11 #define MAP_BIT_V_FLIP 0x1000 |
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12 |
75 | 13 #define BIT_PAL 0x8 |
14 #define BIT_DMA_ENABLE 0x4 | |
15 #define BIT_H40 0x1 | |
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16 |
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17 #define SCROLL_BUFFER_SIZE 32 |
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18 #define SCROLL_BUFFER_DRAW 16 |
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19 |
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20 #define FIFO_SIZE 4 |
40 | 21 |
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22 void init_vdp_context(vdp_context * context) |
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23 { |
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24 memset(context, 0, sizeof(*context)); |
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25 context->vdpmem = malloc(VRAM_SIZE); |
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26 memset(context->vdpmem, 0, VRAM_SIZE); |
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27 context->framebuf = malloc(FRAMEBUF_SIZE); |
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28 memset(context->framebuf, 0, FRAMEBUF_SIZE); |
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29 context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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30 memset(context->linebuf, 0, LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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31 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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32 context->tmp_buf_b = context->tmp_buf_a + SCROLL_BUFFER_SIZE; |
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33 context->sprite_draws = MAX_DRAWS; |
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34 context->fifo_cur = malloc(sizeof(fifo_entry) * FIFO_SIZE); |
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35 context->fifo_end = context->fifo_cur + FIFO_SIZE; |
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36 } |
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37 |
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38 void render_sprite_cells(vdp_context * context) |
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39 { |
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40 if (context->cur_slot >= context->sprite_draws) { |
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41 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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42 |
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43 uint16_t dir; |
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44 int16_t x; |
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45 if (d->h_flip) { |
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46 x = d->x_pos + 7; |
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47 dir = -1; |
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48 } else { |
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49 x = d->x_pos; |
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50 dir = 1; |
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51 } |
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52 //printf("Draw Slot %d of %d, Rendering sprite cell from %X to x: %d\n", context->cur_slot, context->sprite_draws, d->address, x); |
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53 context->cur_slot--; |
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54 for (uint16_t address = d->address; address < d->address+4; address++) { |
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55 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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56 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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57 } |
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58 x += dir; |
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59 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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60 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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61 } |
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62 x += dir; |
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63 } |
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64 } |
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65 } |
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66 |
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67 void scan_sprite_table(uint32_t line, vdp_context * context) |
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68 { |
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69 if (context->sprite_index && context->slot_counter) { |
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70 line += 1; |
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71 line &= 0xFF; |
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72 context->sprite_index &= 0x7F; |
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73 if (context->latched_mode & BIT_H40) { |
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74 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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75 context->sprite_index = 0; |
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76 return; |
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77 } |
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78 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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79 context->sprite_index = 0; |
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80 return; |
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81 } |
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82 //TODO: Read from SAT cache rather than from VRAM |
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83 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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84 uint16_t address = context->sprite_index * 8 + sat_address; |
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85 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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86 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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87 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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88 if (y <= line && line < (y + height)) { |
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89 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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90 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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91 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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92 context->sprite_info_list[context->slot_counter].y = y; |
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93 } |
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94 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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95 if (context->sprite_index && context->slot_counter) |
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96 { |
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97 address = context->sprite_index * 8 + sat_address; |
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98 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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99 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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100 if (y <= line && line < (y + height)) { |
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101 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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102 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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103 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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104 context->sprite_info_list[context->slot_counter].y = y; |
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105 } |
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106 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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107 } |
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108 } |
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109 } |
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110 |
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111 void read_sprite_x(uint32_t line, vdp_context * context) |
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112 { |
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113 if (context->cur_slot >= context->slot_counter) { |
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114 if (context->sprite_draws) { |
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115 line += 1; |
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116 line &= 0xFF; |
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117 //in tiles |
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118 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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119 //in pixels |
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120 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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121 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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122 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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123 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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124 uint8_t row; |
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125 if (tileinfo & MAP_BIT_V_FLIP) { |
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126 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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127 } else { |
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128 row = line-context->sprite_info_list[context->cur_slot].y; |
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129 } |
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130 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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131 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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132 if (x) { |
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133 context->flags |= FLAG_CAN_MASK; |
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134 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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135 context->flags |= FLAG_MASKED; |
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136 } |
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137 |
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138 context->flags &= ~FLAG_DOT_OFLOW; |
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139 int16_t i; |
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140 if (context->flags & FLAG_MASKED) { |
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141 for (i=0; i < width && context->sprite_draws; i++) { |
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142 --context->sprite_draws; |
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143 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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144 } |
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145 } else { |
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146 x -= 128; |
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147 int16_t base_x = x; |
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148 int16_t dir; |
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149 if (tileinfo & MAP_BIT_H_FLIP) { |
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150 x += (width-1) * 8; |
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151 dir = -8; |
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152 } else { |
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153 dir = 8; |
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154 } |
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155 //printf("Sprite %d | x: %d, y: %d, width: %d, height: %d, pal_priority: %X, row: %d, tile addr: %X\n", context->sprite_info_list[context->cur_slot].index, x, context->sprite_info_list[context->cur_slot].y, width, height, pal_priority, row, address); |
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156 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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157 --context->sprite_draws; |
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158 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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159 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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160 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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161 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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162 } |
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163 } |
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164 if (i < width) { |
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165 context->flags |= FLAG_DOT_OFLOW; |
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166 } |
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167 context->cur_slot--; |
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168 } else { |
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169 context->flags |= FLAG_DOT_OFLOW; |
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170 } |
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171 } |
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172 } |
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173 |
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174 #define VRAM_READ 0 |
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175 #define VRAM_WRITE 1 |
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176 #define CRAM_READ 8 |
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177 #define CRAM_WRITE 3 |
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178 #define VSRAM_READ 4 |
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179 #define VSRAM_WRITE 5 |
75 | 180 #define DMA_START 0x20 |
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181 |
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182 void external_slot(vdp_context * context) |
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183 { |
75 | 184 //TODO: Figure out what happens if CD bit 4 is not set in DMA copy mode |
185 //TODO: Figure out what happens when CD:0-3 is not set to a write mode in DMA operations | |
186 //TODO: Figure out what happens if DMA gets disabled part way through a DMA fill or DMA copy | |
187 if((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->flags & FLAG_DMA_RUN)) { | |
188 uint16_t dma_len; | |
189 switch(context->regs[REG_DMASRC_H] & 0xC0) | |
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190 { |
75 | 191 //68K -> VDP |
192 case 0: | |
193 case 0x40: | |
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194 switch(context->dma_cd & 0xF) |
75 | 195 { |
196 case VRAM_WRITE: | |
197 if (context->flags & FLAG_DMA_PROG) { | |
198 context->vdpmem[context->address ^ 1] = context->dma_val; | |
199 context->flags &= ~FLAG_DMA_PROG; | |
200 } else { | |
201 context->dma_val = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
202 context->vdpmem[context->address] = context->dma_val >> 8; | |
203 context->flags |= FLAG_DMA_PROG; | |
204 } | |
205 break; | |
206 case CRAM_WRITE: | |
207 context->cram[(context->address/2) & (CRAM_SIZE-1)] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
208 break; | |
209 case VSRAM_WRITE: | |
210 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
211 context->vsram[(context->address/2) & 63] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
212 } | |
213 break; | |
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214 } |
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215 break; |
75 | 216 //Fill |
217 case 0x80: | |
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218 switch(context->dma_cd & 0xF) |
75 | 219 { |
220 case VRAM_WRITE: | |
221 //Charles MacDonald's VDP doc says that the low byte gets written first | |
222 //this doesn't make a lot of sense to me, but until I've had a change to | |
223 //verify it myself, I'll assume it's true | |
224 if (context->flags & FLAG_DMA_PROG) { | |
225 context->vdpmem[context->address ^ 1] = context->dma_val >> 8; | |
226 context->flags &= ~FLAG_DMA_PROG; | |
227 } else { | |
228 context->dma_val = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); | |
229 context->vdpmem[context->address] = context->dma_val; | |
230 context->flags |= FLAG_DMA_PROG; | |
231 } | |
232 break; | |
233 case CRAM_WRITE: | |
234 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
235 break; | |
236 case VSRAM_WRITE: | |
237 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
238 context->vsram[(context->address/2) & 63] = context->dma_val; | |
239 } | |
240 break; | |
241 } | |
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242 break; |
75 | 243 //Copy |
244 case 0xC0: | |
245 if (context->flags & FLAG_DMA_PROG) { | |
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246 switch(context->dma_cd & 0xF) |
75 | 247 { |
248 case VRAM_WRITE: | |
249 context->vdpmem[context->address] = context->dma_val; | |
250 break; | |
251 case CRAM_WRITE: | |
252 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
253 break; | |
254 case VSRAM_WRITE: | |
255 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
256 context->vsram[(context->address/2) & 63] = context->dma_val; | |
257 } | |
258 break; | |
259 } | |
260 context->flags &= ~FLAG_DMA_PROG; | |
261 } else { | |
262 //I assume, that DMA copy copies from the same RAM as the destination | |
263 //but it's possible I'm mistaken | |
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264 switch(context->dma_cd & 0xF) |
75 | 265 { |
266 case VRAM_WRITE: | |
267 context->dma_val = context->vdpmem[(context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]]; | |
268 break; | |
269 case CRAM_WRITE: | |
270 context->dma_val = context->cram[context->regs[REG_DMASRC_L] & (CRAM_SIZE-1)]; | |
271 break; | |
272 case VSRAM_WRITE: | |
273 if ((context->regs[REG_DMASRC_L] & 63) < VSRAM_SIZE) { | |
274 context->dma_val = context->vsram[context->regs[REG_DMASRC_L] & 63]; | |
275 } else { | |
276 context->dma_val = 0; | |
277 } | |
278 break; | |
279 } | |
280 context->flags |= FLAG_DMA_PROG; | |
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281 } |
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282 break; |
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283 } |
75 | 284 if (!(context->flags & FLAG_DMA_PROG)) { |
285 context->address += context->regs[REG_AUTOINC]; | |
286 context->regs[REG_DMASRC_L] += 1; | |
287 dma_len = ((context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]) - 1; | |
288 context->regs[REG_DMALEN_H] = dma_len >> 8; | |
289 context->regs[REG_DMALEN_L] = dma_len; | |
290 if (!dma_len) { | |
291 context->flags &= ~FLAG_DMA_RUN; | |
292 } | |
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293 } |
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294 } else { |
75 | 295 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
296 if (context->fifo_cur != start && start->cycle <= context->cycles) { | |
297 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->cd & DMA_START)) { | |
298 context->flags |= FLAG_DMA_RUN; | |
299 context->dma_val = start->value; | |
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300 context->dma_cd = context->cd; |
75 | 301 } else { |
302 switch (context->cd & 0xF) | |
303 { | |
304 case VRAM_WRITE: | |
305 if (start->partial) { | |
306 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); | |
307 context->vdpmem[context->address ^ 1] = start->value; | |
308 } else { | |
309 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); | |
310 context->vdpmem[context->address] = start->value >> 8; | |
311 start->partial = 1; | |
312 //skip auto-increment and removal of entry from fifo | |
313 return; | |
314 } | |
315 break; | |
316 case CRAM_WRITE: | |
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317 //printf("CRAM Write: %X to %X\n", start->value, context->address); |
75 | 318 context->cram[(context->address/2) & (CRAM_SIZE-1)] = start->value; |
319 break; | |
320 case VSRAM_WRITE: | |
321 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
322 //printf("VSRAM Write: %X to %X\n", start->value, context->address); | |
323 context->vsram[(context->address/2) & 63] = start->value; | |
324 } | |
325 break; | |
326 } | |
327 context->address += context->regs[REG_AUTOINC]; | |
328 } | |
329 fifo_entry * cur = start+1; | |
330 if (cur < context->fifo_cur) { | |
331 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); | |
332 } | |
333 context->fifo_cur -= 1; | |
334 } else { | |
335 context->flags |= FLAG_UNUSED_SLOT; | |
336 } | |
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337 } |
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338 } |
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339 |
40 | 340 #define WINDOW_RIGHT 0x80 |
341 #define WINDOW_DOWN 0x80 | |
342 | |
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343 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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344 { |
40 | 345 if (!vsram_off) { |
346 uint16_t left_col, right_col; | |
347 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
41
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348 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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349 right_col = 42; |
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350 } else { |
40 | 351 left_col = 0; |
352 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
353 if (right_col) { | |
354 right_col += 2; | |
355 } | |
356 } | |
41
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357 uint16_t top_line, bottom_line; |
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358 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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359 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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360 bottom_line = 241; |
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361 } else { |
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362 top_line = 0; |
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363 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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364 } |
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365 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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366 uint16_t address = context->regs[REG_WINDOW] << 10; |
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367 uint16_t line_offset, offset, mask; |
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368 if (context->latched_mode & BIT_H40) { |
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369 address &= 0xF000; |
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370 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
41
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371 mask = 0x7F; |
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372 |
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373 } else { |
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374 address &= 0xF800; |
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375 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
41
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376 mask = 0x3F; |
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377 } |
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378 offset = address + line_offset + (((column - 2) * 2) & mask); |
41
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379 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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380 //printf("Window | top: %d, bot: %d, left: %d, right: %d, base: %X, line: %X offset: %X, tile: %X, reg: %X\n", top_line, bottom_line, left_col, right_col, address, line_offset, offset, ((context->col_1 & 0x3FF) << 5), context->regs[REG_WINDOW]); |
42
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381 offset = address + line_offset + (((column - 1) * 2) & mask); |
41
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382 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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383 context->v_offset = (line) & 0x7; |
41
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384 context->flags |= FLAG_WINDOW; |
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385 return; |
40 | 386 } |
387 context->flags &= ~FLAG_WINDOW; | |
388 } | |
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389 uint16_t vscroll; |
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390 switch(context->regs[REG_SCROLL] & 0x30) |
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391 { |
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392 case 0: |
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393 vscroll = 0xFF; |
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394 break; |
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395 case 0x10: |
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396 vscroll = 0x1FF; |
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397 break; |
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398 case 0x20: |
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399 //TODO: Verify this behavior |
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400 vscroll = 0; |
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401 break; |
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402 case 0x30: |
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403 vscroll = 0x3FF; |
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404 break; |
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405 } |
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406 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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407 context->v_offset = vscroll & 0x7; |
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408 //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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409 vscroll /= 8; |
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410 uint16_t hscroll_mask; |
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411 uint16_t v_mul; |
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412 switch(context->regs[REG_SCROLL] & 0x3) |
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413 { |
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414 case 0: |
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415 hscroll_mask = 0x1F; |
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416 v_mul = 64; |
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417 break; |
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418 case 0x1: |
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419 hscroll_mask = 0x3F; |
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420 v_mul = 128; |
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421 break; |
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422 case 0x2: |
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423 //TODO: Verify this behavior |
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424 hscroll_mask = 0; |
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425 v_mul = 0; |
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426 break; |
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427 case 0x3: |
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428 hscroll_mask = 0x7F; |
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429 v_mul = 256; |
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430 break; |
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431 } |
28 | 432 uint16_t hscroll, offset; |
433 for (int i = 0; i < 2; i++) { | |
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434 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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435 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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436 //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 | 437 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
438 if (i) { | |
439 context->col_2 = col_val; | |
440 } else { | |
441 context->col_1 = col_val; | |
442 } | |
443 } | |
20
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444 } |
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445 |
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446 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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447 { |
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448 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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449 } |
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450 |
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451 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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452 { |
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453 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
20
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454 } |
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455 |
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456 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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457 { |
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458 uint16_t address = ((col & 0x7FF) << 5); |
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459 if (col & MAP_BIT_V_FLIP) { |
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460 address += 28 - 4 * context->v_offset; |
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461 } else { |
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462 address += 4 * context->v_offset; |
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463 } |
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464 uint16_t pal_priority = (col >> 9) & 0x70; |
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465 int32_t dir; |
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466 if (col & MAP_BIT_H_FLIP) { |
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467 tmp_buf += 7; |
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468 dir = -1; |
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469 } else { |
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470 dir = 1; |
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471 } |
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472 for (uint32_t i=0; i < 4; i++, address++) |
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473 { |
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474 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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diff
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475 tmp_buf += dir; |
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476 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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477 tmp_buf += dir; |
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478 } |
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479 } |
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480 |
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481 void render_map_1(vdp_context * context) |
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482 { |
39
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38
diff
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|
483 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
20
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484 } |
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485 |
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486 void render_map_2(vdp_context * context) |
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487 { |
39
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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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488 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
20
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489 } |
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490 |
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491 void render_map_3(vdp_context * context) |
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492 { |
39
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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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493 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
20
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494 } |
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495 |
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496 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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497 { |
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498 if (line >= 240) { |
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499 return; |
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500 } |
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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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501 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
20
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502 uint16_t *dst, *end; |
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503 uint8_t *sprite_buf, *plane_a, *plane_b; |
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504 if (col) |
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505 { |
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506 col-=2; |
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507 dst = context->framebuf + line * 320 + col * 8; |
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508 sprite_buf = context->linebuf + col * 8; |
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Add debug render mode and fix vertical flip bit for bg tiles
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509 uint16_t a_src; |
40 | 510 if (context->flags & FLAG_WINDOW) { |
511 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
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512 a_src = FBUF_SRC_W; |
40 | 513 } else { |
514 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
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515 a_src = FBUF_SRC_A; |
40 | 516 } |
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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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517 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
30 | 518 end = dst + 16; |
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519 uint16_t src; |
30 | 520 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
20
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521 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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522 uint8_t pixel; |
21
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20
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523 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
20
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524 pixel = *sprite_buf; |
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525 src = FBUF_SRC_S; |
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20
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526 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
20
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527 pixel = *plane_a; |
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528 src = a_src; |
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20
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529 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
20
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530 pixel = *plane_b; |
43
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531 src = FBUF_SRC_B; |
20
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532 } else if (*sprite_buf & 0xF) { |
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533 pixel = *sprite_buf; |
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|
534 src = FBUF_SRC_S; |
20
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535 } else if (*plane_a & 0xF) { |
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|
536 pixel = *plane_a; |
43
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537 src = a_src; |
20
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538 } else if (*plane_b & 0xF){ |
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|
539 pixel = *plane_b; |
43
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|
540 src = FBUF_SRC_B; |
20
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|
541 } else { |
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|
542 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
43
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parents:
42
diff
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|
543 src = FBUF_SRC_BG; |
20
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544 } |
43
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42
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|
545 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
20
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diff
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|
546 } |
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diff
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|
547 } else { |
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diff
changeset
|
548 //dst = context->framebuf + line * 320; |
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549 //sprite_buf = context->linebuf + col * 8; |
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diff
changeset
|
550 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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parents:
diff
changeset
|
551 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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parents:
diff
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|
552 //end = dst + 8; |
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parents:
diff
changeset
|
553 } |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 |
40 | 555 uint16_t remaining; |
556 if (!(context->flags & FLAG_WINDOW)) { | |
557 remaining = context->hscroll_a & 0xF; | |
558 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
559 } | |
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
|
560 remaining = context->hscroll_b & 0xF; |
3c69319269ef
Horizontal scroll works correctly now. In particular, the SEGA logo in Vectorman has a nice smooth wave like it should
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parents:
38
diff
changeset
|
561 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
20
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diff
changeset
|
562 } |
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diff
changeset
|
563 |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
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parents:
diff
changeset
|
565 case startcyc:\ |
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parents:
diff
changeset
|
566 read_map_scroll_a(column, line, context);\ |
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parents:
diff
changeset
|
567 break;\ |
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parents:
diff
changeset
|
568 case (startcyc+1):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
569 external_slot(context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
570 break;\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
571 case (startcyc+2):\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 render_map_1(context);\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
573 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 case (startcyc+3):\ |
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parents:
diff
changeset
|
575 render_map_2(context);\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
576 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 case (startcyc+4):\ |
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parents:
diff
changeset
|
578 read_map_scroll_b(column, line, context);\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
579 break;\ |
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parents:
diff
changeset
|
580 case (startcyc+5):\ |
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parents:
diff
changeset
|
581 read_sprite_x(line, context);\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 break;\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 case (startcyc+6):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 render_map_3(context);\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 case (startcyc+7):\ |
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parents:
diff
changeset
|
587 render_map_output(line, column, context);\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
588 break; |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
589 |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
590 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
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parents:
diff
changeset
|
591 case startcyc:\ |
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parents:
diff
changeset
|
592 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
|
593 break;\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 case (startcyc+1):\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 break;\ |
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 case (startcyc+2):\ |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 render_map_1(context);\ |
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Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
598 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 case (startcyc+3):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
600 render_map_2(context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
601 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 case (startcyc+4):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 read_map_scroll_b(column, line, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 break;\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 case (startcyc+5):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 read_sprite_x(line, context);\ |
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 (startcyc+6):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 render_map_3(context);\ |
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 (startcyc+7):\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
612 render_map_output(line, column, context);\ |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 void vdp_h40(uint32_t line, uint32_t linecyc, vdp_context * context) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 uint16_t address; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 uint32_t mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
621 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
622 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
|
623 context->cur_slot = MAX_DRAWS-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 memset(context->linebuf, 0, LINEBUF_SIZE); |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
625 render_sprite_cells(context); |
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 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 case 2: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 case 3: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
630 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 //sprite attribute table scan starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 case 4: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
634 render_sprite_cells( context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 context->sprite_index = 0x80; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 context->slot_counter = MAX_SPRITES_LINE; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 case 13: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 14: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 case 19: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
655 //!HSYNC asserted |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 case 22: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
658 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 26: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 27: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 case 28: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
671 case 31: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 case 32: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
673 case 33: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
674 case 34: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
675 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 case 35: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 mask = 0; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 if (context->regs[REG_MODE_3] & 0x2) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 mask |= 0xF8; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
683 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 if (context->regs[REG_MODE_3] & 0x1) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 mask |= 0x7; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
687 line &= mask; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
688 address += line * 4; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
689 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
|
690 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
691 //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
|
692 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 case 36: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 //!HSYNC high |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 case 37: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
696 case 38: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
697 case 39: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
698 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
699 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
700 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
701 case 40: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
702 read_map_scroll_a(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
703 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
704 case 41: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
705 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
706 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 case 42: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
709 render_map_1(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
712 case 43: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
713 render_map_2(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
714 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
715 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
716 case 44: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
717 read_map_scroll_b(0, line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
718 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
719 case 45: |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
720 render_sprite_cells(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
721 scan_sprite_table(line, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
722 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
723 case 46: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
724 render_map_3(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
725 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
727 case 47: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
728 render_map_output(line, 0, context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
729 scan_sprite_table(line, context);//Just a guess |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
730 //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
|
731 //filled rather than the number of available slots |
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
732 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
733 context->cur_slot = MAX_SPRITES_LINE-1; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
734 context->sprite_draws = MAX_DRAWS; |
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
735 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 COLUMN_RENDER_BLOCK(2, 48) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
738 COLUMN_RENDER_BLOCK(4, 56) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
739 COLUMN_RENDER_BLOCK(6, 64) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 COLUMN_RENDER_BLOCK(10, 80) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
742 COLUMN_RENDER_BLOCK(12, 88) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
743 COLUMN_RENDER_BLOCK(14, 96) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
745 COLUMN_RENDER_BLOCK(18, 112) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
746 COLUMN_RENDER_BLOCK(20, 120) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
747 COLUMN_RENDER_BLOCK(22, 128) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 COLUMN_RENDER_BLOCK(26, 144) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 COLUMN_RENDER_BLOCK(28, 152) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
751 COLUMN_RENDER_BLOCK(30, 160) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
752 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
753 COLUMN_RENDER_BLOCK(34, 176) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
754 COLUMN_RENDER_BLOCK(36, 184) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
755 COLUMN_RENDER_BLOCK(38, 192) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
756 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 case 208: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 case 209: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
759 external_slot(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
760 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
761 default: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
762 //leftovers from HSYNC clock change nonsense |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
763 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
764 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
765 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
766 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
767 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
|
768 { |
37 | 769 uint16_t address; |
770 uint32_t mask; | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
771 switch(linecyc) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
772 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
773 //sprite render to line buffer starts |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
774 case 0: |
37 | 775 context->cur_slot = MAX_DRAWS_H32-1; |
776 memset(context->linebuf, 0, LINEBUF_SIZE); | |
777 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
778 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
779 case 1: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
780 case 2: |
37 | 781 case 3: |
782 render_sprite_cells(context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
783 break; |
37 | 784 //sprite attribute table scan starts |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
785 case 4: |
37 | 786 render_sprite_cells( context); |
787 context->sprite_index = 0x80; | |
788 context->slot_counter = MAX_SPRITES_LINE_H32; | |
789 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
790 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
791 case 5: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
792 case 6: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
793 case 7: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
794 case 8: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
795 case 9: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
796 case 10: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
797 case 11: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
798 case 12: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
799 case 13: |
37 | 800 render_sprite_cells(context); |
801 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
802 case 14: |
37 | 803 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
804 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
805 case 15: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
806 case 16: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
807 case 17: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
808 case 18: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
809 case 19: |
37 | 810 //HSYNC start |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
811 case 20: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
812 case 21: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
813 case 22: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
814 case 23: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
815 case 24: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
816 case 25: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
817 case 26: |
37 | 818 render_sprite_cells(context); |
819 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
820 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
821 case 27: |
37 | 822 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
823 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
824 case 28: |
37 | 825 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
826 mask = 0; | |
827 if (context->regs[REG_MODE_3] & 0x2) { | |
828 mask |= 0xF8; | |
829 } | |
830 if (context->regs[REG_MODE_3] & 0x1) { | |
831 mask |= 0x7; | |
832 } | |
833 line &= mask; | |
834 address += line * 4; | |
835 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
836 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
837 //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
|
838 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
839 case 29: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
840 case 30: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
841 case 31: |
37 | 842 case 32: |
843 render_sprite_cells(context); | |
844 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
845 break; |
37 | 846 //!HSYNC high |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
847 case 33: |
37 | 848 read_map_scroll_a(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
849 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
850 case 34: |
37 | 851 render_sprite_cells(context); |
852 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
853 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
854 case 35: |
37 | 855 render_map_1(context); |
856 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
|
857 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
858 case 36: |
37 | 859 render_map_2(context); |
860 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
|
861 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
862 case 37: |
37 | 863 read_map_scroll_b(0, line, context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
864 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
865 case 38: |
37 | 866 render_sprite_cells(context); |
867 scan_sprite_table(line, context); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
868 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
869 case 39: |
37 | 870 render_map_3(context); |
871 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
|
872 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
873 case 40: |
37 | 874 render_map_output(line, 0, context); |
875 scan_sprite_table(line, context);//Just a guess | |
876 //reverse context slot counter so it counts the number of sprite slots | |
877 //filled rather than the number of available slots | |
878 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
879 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
880 context->sprite_draws = MAX_DRAWS_H32; | |
881 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
882 break; |
37 | 883 COLUMN_RENDER_BLOCK(2, 41) |
884 COLUMN_RENDER_BLOCK(4, 49) | |
885 COLUMN_RENDER_BLOCK(6, 57) | |
886 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
887 COLUMN_RENDER_BLOCK(10, 73) | |
888 COLUMN_RENDER_BLOCK(12, 81) | |
889 COLUMN_RENDER_BLOCK(14, 89) | |
890 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
891 COLUMN_RENDER_BLOCK(18, 105) | |
892 COLUMN_RENDER_BLOCK(20, 113) | |
893 COLUMN_RENDER_BLOCK(22, 121) | |
894 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
895 COLUMN_RENDER_BLOCK(26, 137) | |
896 COLUMN_RENDER_BLOCK(28, 145) | |
897 COLUMN_RENDER_BLOCK(30, 153) | |
898 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
899 case 169: |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
900 case 170: |
37 | 901 external_slot(context); |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
902 break; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
903 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
904 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
905 void latch_mode(vdp_context * context) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
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|
906 { |
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907 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
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|
908 } |
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|
909 |
54
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diff
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|
910 int is_refresh(vdp_context * context) |
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|
911 { |
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|
912 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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|
913 if (context->latched_mode & BIT_H40) { |
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|
914 linecyc = linecyc/16; |
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915 return (linecyc == 73 || linecyc == 105 || linecyc == 137 || linecyc == 169 || linecyc == 201); |
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|
916 } else { |
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|
917 linecyc = linecyc/20; |
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918 return (linecyc == 66 || linecyc == 98 || linecyc == 130 || linecyc == 162); |
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|
919 } |
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|
920 } |
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Get Flavio's color bar demo kind of sort of working
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|
921 |
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|
922 void check_render_bg(vdp_context * context, int32_t line) |
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|
923 { |
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Get Flavio's color bar demo kind of sort of working
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|
924 if (line > 0) { |
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Get Flavio's color bar demo kind of sort of working
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|
925 line -= 1; |
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|
926 uint16_t * start = NULL, *end = NULL; |
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927 uint32_t linecyc = (context->cycles % MCLKS_LINE); |
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|
928 if (context->latched_mode & BIT_H40) { |
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diff
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|
929 linecyc /= 16; |
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Get Flavio's color bar demo kind of sort of working
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930 if (linecyc >= 55 && linecyc <= 207 && !((linecyc-55) % 8)) { |
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Get Flavio's color bar demo kind of sort of working
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|
931 uint32_t x = ((linecyc-55)&(~0xF))*2; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
932 start = context->framebuf + line * 320 + x; |
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Get Flavio's color bar demo kind of sort of working
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|
933 end = start + 16; |
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Get Flavio's color bar demo kind of sort of working
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|
934 } |
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Get Flavio's color bar demo kind of sort of working
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|
935 } else { |
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Get Flavio's color bar demo kind of sort of working
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|
936 linecyc /= 20; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
937 if (linecyc >= 48 && linecyc <= 168 && !((linecyc-48) % 8)) { |
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Get Flavio's color bar demo kind of sort of working
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43
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|
938 uint32_t x = ((linecyc-48)&(~0xF))*2; |
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|
939 start = context->framebuf + line * 256 + x; |
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Get Flavio's color bar demo kind of sort of working
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|
940 end = start + 16; |
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Get Flavio's color bar demo kind of sort of working
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|
941 } |
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|
942 } |
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|
943 while (start != end) { |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
944 *start = context->regs[REG_BG_COLOR] & 0x3F; |
3b79cbcf6846
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|
945 ++start; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
946 } |
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|
947 } |
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|
948 } |
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|
949 |
20
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|
950 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
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|
951 { |
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952 while(context->cycles < target_cycles) |
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|
953 { |
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|
954 uint32_t line = context->cycles / MCLKS_LINE; |
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955 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
54
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956 if (!line) { |
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957 latch_mode(context); |
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958 } |
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959 if (line < active_lines && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { |
20
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960 //first sort-of active line is treated as 255 internally |
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961 //it's used for gathering sprite info for line |
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962 line = (line - 1) & 0xFF; |
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963 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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|
964 |
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|
965 //Convert to slot number |
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966 if (context->latched_mode & BIT_H40){ |
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967 //TODO: Deal with nasty clock switching during HBLANK |
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968 linecyc = linecyc/16; |
54
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969 vdp_h40(line, linecyc, context); |
20
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970 context->cycles += 16; |
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|
971 } else { |
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|
972 linecyc = linecyc/20; |
54
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973 vdp_h32(line, linecyc, context); |
20
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974 context->cycles += 20; |
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|
975 } |
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976 } else { |
54
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977 if (!is_refresh(context)) { |
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978 external_slot(context); |
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979 } |
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980 if (line < active_lines) { |
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981 check_render_bg(context, line); |
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982 } |
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|
983 if (context->latched_mode & BIT_H40){ |
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|
984 //TODO: Deal with nasty clock switching during HBLANK |
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985 context->cycles += 16; |
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|
986 } else { |
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|
987 context->cycles += 20; |
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988 } |
20
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|
989 } |
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|
990 } |
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|
991 } |
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Mostly broken VDP core and savestate viewer
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|
992 |
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|
993 uint32_t vdp_run_to_vblank(vdp_context * context) |
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|
994 { |
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|
995 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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|
996 vdp_run_context(context, target_cycles); |
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|
997 return context->cycles; |
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|
998 } |
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999 |
75 | 1000 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) |
1001 { | |
1002 for(;;) { | |
1003 uint32_t dmalen = (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]; | |
1004 if (!dmalen) { | |
1005 dmalen = 0x10000; | |
1006 } | |
1007 uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); | |
1008 if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { | |
1009 //DMA copies take twice as long to complete since they require a read and a write | |
1010 //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word | |
1011 min_dma_complete *= 2; | |
1012 } | |
1013 min_dma_complete += context->cycles; | |
1014 if (target_cycles < min_dma_complete) { | |
1015 vdp_run_context(context, target_cycles); | |
1016 return; | |
1017 } else { | |
1018 vdp_run_context(context, min_dma_complete); | |
1019 if (!(context->flags & FLAG_DMA_RUN)) { | |
1020 return; | |
1021 } | |
1022 } | |
1023 } | |
1024 } | |
1025 | |
1026 int vdp_control_port_write(vdp_context * context, uint16_t value) | |
54
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1027 { |
58
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56
diff
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|
1028 //printf("control port write: %X\n", value); |
54
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|
1029 if (context->flags & FLAG_PENDING) { |
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1030 context->address = (context->address & 0x3FFF) | (value << 14); |
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1031 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); |
75 | 1032 context->flags &= ~FLAG_PENDING; |
87
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84
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|
1033 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); |
75 | 1034 if (context->cd & 0x20) { |
1035 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { | |
1036 //DMA copy or 68K -> VDP, transfer starts immediately | |
1037 context->flags |= FLAG_DMA_RUN; | |
131
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diff
changeset
|
1038 context->dma_cd = context->cd; |
75 | 1039 if (!(context->regs[REG_DMASRC_H] & 0x80)) { |
1040 return 1; | |
1041 } | |
1042 } | |
63
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|
1043 } |
54
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1044 } else { |
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|
1045 if ((value & 0xC000) == 0x8000) { |
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|
1046 //Register write |
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|
1047 uint8_t reg = (value >> 8) & 0x1F; |
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|
1048 if (reg < VDP_REGS) { |
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1049 //printf("register %d set to %X\n", reg, value & 0xFF); |
54
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diff
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|
1050 context->regs[reg] = value; |
87
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
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84
diff
changeset
|
1051 /*if (reg == REG_MODE_2) { |
63
a6dd5b7a971b
Add FPS counter to console output
Mike Pavone <pavone@retrodev.com>
parents:
58
diff
changeset
|
1052 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
87
60b5c9e2f4e0
vertical interrupts now work
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84
diff
changeset
|
1053 }*/ |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
1054 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1055 } else { |
3b79cbcf6846
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43
diff
changeset
|
1056 context->flags |= FLAG_PENDING; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
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|
1057 context->address = (context->address &0xC000) | (value & 0x3FFF); |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
1058 context->cd = (context->cd &0x3C) | (value >> 14); |
3b79cbcf6846
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43
diff
changeset
|
1059 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
1060 } |
75 | 1061 return 0; |
54
3b79cbcf6846
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43
diff
changeset
|
1062 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1063 |
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43
diff
changeset
|
1064 void vdp_data_port_write(vdp_context * context, uint16_t value) |
3b79cbcf6846
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43
diff
changeset
|
1065 { |
58
a6a19c45d358
Properly zero-init all VDP buffers. Comment out some debug printfs.
Mike Pavone <pavone@retrodev.com>
parents:
56
diff
changeset
|
1066 //printf("data port write: %X\n", value); |
54
3b79cbcf6846
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43
diff
changeset
|
1067 context->flags &= ~FLAG_PENDING; |
109
004dd46e0a97
COmment out fifo full debug printf
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108
diff
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|
1068 /*if (context->fifo_cur == context->fifo_end) { |
54
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43
diff
changeset
|
1069 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
109
004dd46e0a97
COmment out fifo full debug printf
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108
diff
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|
1070 }*/ |
54
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43
diff
changeset
|
1071 while (context->fifo_cur == context->fifo_end) { |
3b79cbcf6846
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43
diff
changeset
|
1072 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
3b79cbcf6846
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43
diff
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|
1073 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1074 context->fifo_cur->cycle = context->cycles; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
1075 context->fifo_cur->value = value; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1076 context->fifo_cur->partial = 0; |
3b79cbcf6846
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43
diff
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|
1077 context->fifo_cur++; |
3b79cbcf6846
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43
diff
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|
1078 } |
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43
diff
changeset
|
1079 |
3b79cbcf6846
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43
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changeset
|
1080 uint16_t vdp_control_port_read(vdp_context * context) |
3b79cbcf6846
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43
diff
changeset
|
1081 { |
3b79cbcf6846
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43
diff
changeset
|
1082 context->flags &= ~FLAG_PENDING; |
3b79cbcf6846
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43
diff
changeset
|
1083 uint16_t value = 0x3400; |
3b79cbcf6846
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43
diff
changeset
|
1084 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1085 value |= 0x200; |
3b79cbcf6846
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diff
changeset
|
1086 } |
3b79cbcf6846
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parents:
43
diff
changeset
|
1087 if (context->fifo_cur == context->fifo_end) { |
3b79cbcf6846
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diff
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|
1088 value |= 0x100; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
1089 } |
75 | 1090 if (context->flags & FLAG_DMA_RUN) { |
1091 value |= 0x20; | |
1092 } | |
54
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diff
changeset
|
1093 //TODO: Lots of other bits in status port |
3b79cbcf6846
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|
1094 return value; |
3b79cbcf6846
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diff
changeset
|
1095 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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changeset
|
1096 |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
1097 uint16_t vdp_data_port_read(vdp_context * context) |
3b79cbcf6846
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|
1098 { |
3b79cbcf6846
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changeset
|
1099 context->flags &= ~FLAG_PENDING; |
3b79cbcf6846
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diff
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|
1100 if (!(context->cd & 1)) { |
3b79cbcf6846
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|
1101 return 0; |
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|
1102 } |
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|
1103 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
3b79cbcf6846
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|
1104 context->flags &= ~FLAG_UNUSED_SLOT; |
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43
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changeset
|
1105 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
3b79cbcf6846
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43
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|
1106 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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diff
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|
1107 } |
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Get Flavio's color bar demo kind of sort of working
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changeset
|
1108 uint16_t value = 0; |
3b79cbcf6846
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diff
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|
1109 switch (context->cd & 0x7) |
3b79cbcf6846
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|
1110 { |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
1111 case VRAM_READ: |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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|
1112 value = context->vdpmem[context->address] << 8; |
3b79cbcf6846
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43
diff
changeset
|
1113 context->flags &= ~FLAG_UNUSED_SLOT; |
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43
diff
changeset
|
1114 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
3b79cbcf6846
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|
1115 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
3b79cbcf6846
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diff
changeset
|
1116 } |
3b79cbcf6846
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43
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changeset
|
1117 value |= context->vdpmem[context->address ^ 1]; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1118 break; |
3b79cbcf6846
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43
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changeset
|
1119 case CRAM_READ: |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
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|
1120 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
3b79cbcf6846
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43
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changeset
|
1121 break; |
3b79cbcf6846
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|
1122 case VSRAM_READ: |
3b79cbcf6846
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|
1123 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
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|
1124 value = context->vsram[context->address & 63]; |
3b79cbcf6846
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43
diff
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|
1125 } |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
1126 break; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
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|
1127 } |
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changeset
|
1128 context->address += context->regs[REG_AUTOINC]; |
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
1129 return value; |
3b79cbcf6846
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43
diff
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|
1130 } |
3b79cbcf6846
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43
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|
1131 |
65
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
changeset
|
1132 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
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|
1133 { |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
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|
1134 context->cycles -= deduction; |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
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|
1135 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
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|
1136 if (start->cycle >= deduction) { |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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|
1137 start->cycle -= deduction; |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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|
1138 } else { |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
changeset
|
1139 start->cycle = 0; |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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|
1140 } |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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|
1141 } |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
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|
1142 } |
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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|
1143 |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1144 #define GST_VDP_REGS 0xFA |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
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|
1145 #define GST_VDP_MEM 0x12478 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1146 |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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|
1147 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1148 { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1149 uint8_t tmp_buf[CRAM_SIZE*2]; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1150 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1151 fread(context->regs, 1, VDP_REGS, state_file); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1152 latch_mode(context); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1153 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1154 for (int i = 0; i < CRAM_SIZE; i++) { |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1155 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1156 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1157 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1158 for (int i = 0; i < VSRAM_SIZE; i++) { |
23
3e924bb56560
Fix endianness of VSRAM when read from Genecyst save state
Mike Pavone <pavone@retrodev.com>
parents:
22
diff
changeset
|
1159 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
1160 } |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1161 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1162 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
1163 } |
54
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|
1164 |
56
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1165 void vdp_save_state(vdp_context * context, FILE * outfile) |
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1166 { |
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1167 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1168 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
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1169 fwrite(context->regs, 1, VDP_REGS, outfile); |
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1170 for (int i = 0; i < CRAM_SIZE; i++) { |
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1171 tmp_buf[i*2] = context->cram[i]; |
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1172 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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1173 } |
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1174 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
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1175 for (int i = 0; i < VSRAM_SIZE; i++) { |
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1176 tmp_buf[i*2] = context->vsram[i]; |
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1177 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
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1178 } |
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1179 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
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1180 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
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1181 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
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1182 } |
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1183 |