Mercurial > repos > blastem
annotate vdp.c @ 166:97aa449706c2
Added SMD ROM support
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 06 Jan 2013 09:51:15 -0800 |
| parents | 6b593ea0ed90 |
| children | 8b846bcff6a2 |
| 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) & 0xFFFF); 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 | |
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187 if(context->flags & FLAG_DMA_RUN) { |
| 75 | 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]); | |
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208 //printf("CRAM DMA | %X set to %X from %X at %d\n", (context->address/2) & (CRAM_SIZE-1), context->cram[(context->address/2) & (CRAM_SIZE-1)], (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->cycles); |
| 75 | 209 break; |
| 210 case VSRAM_WRITE: | |
| 211 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 212 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]); | |
| 213 } | |
| 214 break; | |
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215 } |
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216 break; |
| 75 | 217 //Fill |
| 218 case 0x80: | |
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219 switch(context->dma_cd & 0xF) |
| 75 | 220 { |
| 221 case VRAM_WRITE: | |
| 222 //Charles MacDonald's VDP doc says that the low byte gets written first | |
| 142 | 223 context->vdpmem[context->address] = context->dma_val; |
| 224 context->dma_val = (context->dma_val << 8) | ((context->dma_val >> 8) & 0xFF); | |
| 75 | 225 break; |
| 226 case CRAM_WRITE: | |
| 227 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 228 break; | |
| 229 case VSRAM_WRITE: | |
| 230 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 231 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 232 } | |
| 233 break; | |
| 234 } | |
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235 break; |
| 75 | 236 //Copy |
| 237 case 0xC0: | |
| 238 if (context->flags & FLAG_DMA_PROG) { | |
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239 switch(context->dma_cd & 0xF) |
| 75 | 240 { |
| 241 case VRAM_WRITE: | |
| 242 context->vdpmem[context->address] = context->dma_val; | |
| 243 break; | |
| 244 case CRAM_WRITE: | |
| 245 context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val; | |
| 246 break; | |
| 247 case VSRAM_WRITE: | |
| 248 if (((context->address/2) & 63) < VSRAM_SIZE) { | |
| 249 context->vsram[(context->address/2) & 63] = context->dma_val; | |
| 250 } | |
| 251 break; | |
| 252 } | |
| 253 context->flags &= ~FLAG_DMA_PROG; | |
| 254 } else { | |
| 255 //I assume, that DMA copy copies from the same RAM as the destination | |
| 256 //but it's possible I'm mistaken | |
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257 switch(context->dma_cd & 0xF) |
| 75 | 258 { |
| 259 case VRAM_WRITE: | |
| 260 context->dma_val = context->vdpmem[(context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]]; | |
| 261 break; | |
| 262 case CRAM_WRITE: | |
| 263 context->dma_val = context->cram[context->regs[REG_DMASRC_L] & (CRAM_SIZE-1)]; | |
| 264 break; | |
| 265 case VSRAM_WRITE: | |
| 266 if ((context->regs[REG_DMASRC_L] & 63) < VSRAM_SIZE) { | |
| 267 context->dma_val = context->vsram[context->regs[REG_DMASRC_L] & 63]; | |
| 268 } else { | |
| 269 context->dma_val = 0; | |
| 270 } | |
| 271 break; | |
| 272 } | |
| 273 context->flags |= FLAG_DMA_PROG; | |
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274 } |
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275 break; |
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276 } |
| 75 | 277 if (!(context->flags & FLAG_DMA_PROG)) { |
| 278 context->address += context->regs[REG_AUTOINC]; | |
| 279 context->regs[REG_DMASRC_L] += 1; | |
| 135 | 280 if (!context->regs[REG_DMASRC_L]) { |
| 281 context->regs[REG_DMASRC_M] += 1; | |
| 282 } | |
| 75 | 283 dma_len = ((context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]) - 1; |
| 284 context->regs[REG_DMALEN_H] = dma_len >> 8; | |
| 285 context->regs[REG_DMALEN_L] = dma_len; | |
| 286 if (!dma_len) { | |
| 287 context->flags &= ~FLAG_DMA_RUN; | |
| 288 } | |
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289 } |
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290 } else { |
| 75 | 291 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
| 292 if (context->fifo_cur != start && start->cycle <= context->cycles) { | |
| 293 if ((context->regs[REG_MODE_2] & BIT_DMA_ENABLE) && (context->cd & DMA_START)) { | |
| 294 context->flags |= FLAG_DMA_RUN; | |
| 295 context->dma_val = start->value; | |
| 138 | 296 context->address = start->address; //undo auto-increment |
|
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297 context->dma_cd = context->cd; |
| 75 | 298 } else { |
| 138 | 299 switch (start->cd & 0xF) |
| 75 | 300 { |
| 301 case VRAM_WRITE: | |
| 302 if (start->partial) { | |
| 303 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); | |
| 138 | 304 context->vdpmem[start->address ^ 1] = start->value; |
| 75 | 305 } else { |
| 306 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); | |
| 138 | 307 context->vdpmem[start->address] = start->value >> 8; |
| 75 | 308 start->partial = 1; |
| 309 //skip auto-increment and removal of entry from fifo | |
| 310 return; | |
| 311 } | |
| 312 break; | |
| 313 case CRAM_WRITE: | |
|
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314 //printf("CRAM Write | %X to %X\n", start->value, (start->address/2) & (CRAM_SIZE-1)); |
| 138 | 315 context->cram[(start->address/2) & (CRAM_SIZE-1)] = start->value; |
| 75 | 316 break; |
| 317 case VSRAM_WRITE: | |
| 138 | 318 if (((start->address/2) & 63) < VSRAM_SIZE) { |
| 75 | 319 //printf("VSRAM Write: %X to %X\n", start->value, context->address); |
| 138 | 320 context->vsram[(start->address/2) & 63] = start->value; |
| 75 | 321 } |
| 322 break; | |
| 323 } | |
| 138 | 324 //context->address += context->regs[REG_AUTOINC]; |
| 75 | 325 } |
| 326 fifo_entry * cur = start+1; | |
| 327 if (cur < context->fifo_cur) { | |
| 328 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); | |
| 329 } | |
| 330 context->fifo_cur -= 1; | |
| 331 } else { | |
| 332 context->flags |= FLAG_UNUSED_SLOT; | |
| 333 } | |
|
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334 } |
|
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335 } |
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336 |
| 40 | 337 #define WINDOW_RIGHT 0x80 |
| 338 #define WINDOW_DOWN 0x80 | |
| 339 | |
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340 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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341 { |
| 40 | 342 if (!vsram_off) { |
| 343 uint16_t left_col, right_col; | |
| 344 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
|
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345 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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346 right_col = 42; |
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347 } else { |
| 40 | 348 left_col = 0; |
| 349 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
| 350 if (right_col) { | |
| 351 right_col += 2; | |
| 352 } | |
| 353 } | |
|
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354 uint16_t top_line, bottom_line; |
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355 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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356 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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357 bottom_line = 241; |
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358 } else { |
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359 top_line = 0; |
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360 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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361 } |
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362 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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363 uint16_t address = context->regs[REG_WINDOW] << 10; |
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364 uint16_t line_offset, offset, mask; |
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365 if (context->latched_mode & BIT_H40) { |
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366 address &= 0xF000; |
|
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367 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
|
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368 mask = 0x7F; |
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369 |
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370 } else { |
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371 address &= 0xF800; |
|
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372 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
|
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373 mask = 0x3F; |
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374 } |
|
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375 offset = address + line_offset + (((column - 2) * 2) & mask); |
|
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376 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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377 //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]); |
|
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378 offset = address + line_offset + (((column - 1) * 2) & mask); |
|
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379 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
|
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380 context->v_offset = (line) & 0x7; |
|
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381 context->flags |= FLAG_WINDOW; |
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382 return; |
| 40 | 383 } |
| 384 context->flags &= ~FLAG_WINDOW; | |
| 385 } | |
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386 uint16_t vscroll; |
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387 switch(context->regs[REG_SCROLL] & 0x30) |
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388 { |
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389 case 0: |
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390 vscroll = 0xFF; |
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391 break; |
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392 case 0x10: |
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393 vscroll = 0x1FF; |
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394 break; |
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395 case 0x20: |
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396 //TODO: Verify this behavior |
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397 vscroll = 0; |
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398 break; |
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399 case 0x30: |
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400 vscroll = 0x3FF; |
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401 break; |
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402 } |
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403 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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404 context->v_offset = vscroll & 0x7; |
|
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405 //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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406 vscroll /= 8; |
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407 uint16_t hscroll_mask; |
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408 uint16_t v_mul; |
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409 switch(context->regs[REG_SCROLL] & 0x3) |
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410 { |
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411 case 0: |
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412 hscroll_mask = 0x1F; |
|
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413 v_mul = 64; |
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414 break; |
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415 case 0x1: |
|
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416 hscroll_mask = 0x3F; |
|
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417 v_mul = 128; |
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418 break; |
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419 case 0x2: |
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420 //TODO: Verify this behavior |
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421 hscroll_mask = 0; |
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422 v_mul = 0; |
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423 break; |
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424 case 0x3: |
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|
425 hscroll_mask = 0x7F; |
|
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426 v_mul = 256; |
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427 break; |
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428 } |
| 28 | 429 uint16_t hscroll, offset; |
| 430 for (int i = 0; i < 2; i++) { | |
|
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431 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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432 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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433 //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 | 434 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
| 435 if (i) { | |
| 436 context->col_2 = col_val; | |
| 437 } else { | |
| 438 context->col_1 = col_val; | |
| 439 } | |
| 440 } | |
|
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441 } |
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442 |
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443 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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444 { |
|
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445 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
|
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446 } |
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447 |
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448 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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449 { |
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450 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
|
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451 } |
|
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452 |
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453 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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454 { |
|
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455 uint16_t address = ((col & 0x7FF) << 5); |
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456 if (col & MAP_BIT_V_FLIP) { |
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457 address += 28 - 4 * context->v_offset; |
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458 } else { |
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459 address += 4 * context->v_offset; |
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460 } |
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461 uint16_t pal_priority = (col >> 9) & 0x70; |
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462 int32_t dir; |
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463 if (col & MAP_BIT_H_FLIP) { |
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464 tmp_buf += 7; |
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465 dir = -1; |
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466 } else { |
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467 dir = 1; |
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468 } |
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469 for (uint32_t i=0; i < 4; i++, address++) |
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470 { |
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471 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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472 tmp_buf += dir; |
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473 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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474 tmp_buf += dir; |
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475 } |
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476 } |
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477 |
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478 void render_map_1(vdp_context * context) |
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479 { |
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480 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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481 } |
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482 |
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483 void render_map_2(vdp_context * context) |
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484 { |
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485 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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486 } |
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487 |
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488 void render_map_3(vdp_context * context) |
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489 { |
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490 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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491 } |
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492 |
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493 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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494 { |
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495 if (line >= 240) { |
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496 return; |
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497 } |
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498 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
|
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499 uint16_t *dst, *end; |
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500 uint8_t *sprite_buf, *plane_a, *plane_b; |
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501 if (col) |
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502 { |
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503 col-=2; |
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504 dst = context->framebuf + line * 320 + col * 8; |
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505 sprite_buf = context->linebuf + col * 8; |
|
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506 uint16_t a_src; |
| 40 | 507 if (context->flags & FLAG_WINDOW) { |
| 508 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
|
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509 a_src = FBUF_SRC_W; |
| 40 | 510 } else { |
| 511 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
|
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512 a_src = FBUF_SRC_A; |
| 40 | 513 } |
|
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38
diff
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|
514 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
| 30 | 515 end = dst + 16; |
|
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516 uint16_t src; |
| 30 | 517 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
|
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518 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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|
519 uint8_t pixel; |
|
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|
520 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
|
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521 pixel = *sprite_buf; |
|
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|
522 src = FBUF_SRC_S; |
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523 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
|
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|
524 pixel = *plane_a; |
|
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|
525 src = a_src; |
|
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20
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|
526 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
|
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|
527 pixel = *plane_b; |
|
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|
528 src = FBUF_SRC_B; |
|
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529 } else if (*sprite_buf & 0xF) { |
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|
530 pixel = *sprite_buf; |
|
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42
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|
531 src = FBUF_SRC_S; |
|
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diff
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|
532 } else if (*plane_a & 0xF) { |
|
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diff
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|
533 pixel = *plane_a; |
|
43
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42
diff
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|
534 src = a_src; |
|
20
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|
535 } else if (*plane_b & 0xF){ |
|
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diff
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|
536 pixel = *plane_b; |
|
43
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42
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|
537 src = FBUF_SRC_B; |
|
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|
538 } else { |
|
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diff
changeset
|
539 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
|
43
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42
diff
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|
540 src = FBUF_SRC_BG; |
|
20
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diff
changeset
|
541 } |
|
43
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42
diff
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|
542 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
|
20
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|
543 } |
|
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|
544 } else { |
|
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diff
changeset
|
545 //dst = context->framebuf + line * 320; |
|
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|
546 //sprite_buf = context->linebuf + col * 8; |
|
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|
547 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
|
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diff
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|
548 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
|
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|
549 //end = dst + 8; |
|
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parents:
diff
changeset
|
550 } |
|
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diff
changeset
|
551 |
| 40 | 552 uint16_t remaining; |
| 553 if (!(context->flags & FLAG_WINDOW)) { | |
| 554 remaining = context->hscroll_a & 0xF; | |
| 555 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
| 556 } | |
|
39
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38
diff
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|
557 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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38
diff
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|
558 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
|
20
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|
559 } |
|
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changeset
|
560 |
|
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|
561 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
|
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|
562 case startcyc:\ |
|
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diff
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|
563 read_map_scroll_a(column, line, context);\ |
|
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diff
changeset
|
564 break;\ |
|
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diff
changeset
|
565 case (startcyc+1):\ |
|
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diff
changeset
|
566 external_slot(context);\ |
|
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parents:
diff
changeset
|
567 break;\ |
|
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parents:
diff
changeset
|
568 case (startcyc+2):\ |
|
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diff
changeset
|
569 render_map_1(context);\ |
|
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diff
changeset
|
570 break;\ |
|
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parents:
diff
changeset
|
571 case (startcyc+3):\ |
|
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diff
changeset
|
572 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
577 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
578 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
579 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 case startcyc:\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
591 case (startcyc+1):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 case (startcyc+2):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 render_map_1(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 case (startcyc+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
598 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
599 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
600 read_map_scroll_b(column, line, 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+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 read_sprite_x(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+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 render_map_3(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+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 render_map_output(line, column, 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 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
612 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
|
613 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 uint16_t address; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 uint32_t mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 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
|
620 context->cur_slot = MAX_DRAWS-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
621 memset(context->linebuf, 0, LINEBUF_SIZE); |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
622 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
623 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 case 2: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
626 case 3: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
627 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 //sprite attribute table scan starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 case 4: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
631 render_sprite_cells( context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 context->sprite_index = 0x80; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 context->slot_counter = MAX_SPRITES_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 13: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 14: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 case 19: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 //!HSYNC asserted |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 case 22: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
655 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 external_slot(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 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
662 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
663 case 26: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
664 case 27: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 case 28: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
668 case 31: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
669 case 32: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 case 33: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
671 case 34: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
672 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
673 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
674 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
675 case 35: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
676 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 mask = 0; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 if (context->regs[REG_MODE_3] & 0x2) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 mask |= 0xF8; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 if (context->regs[REG_MODE_3] & 0x1) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 mask |= 0x7; |
|
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 line &= mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 address += line * 4; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 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
|
687 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
|
688 //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
|
689 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
690 case 36: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
691 //!HSYNC high |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
692 case 37: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 case 38: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 case 39: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
695 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
696 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
697 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
698 case 40: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
699 read_map_scroll_a(0, 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 41: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
702 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
703 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
704 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
705 case 42: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
706 render_map_1(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
709 case 43: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 render_map_2(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
712 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
713 case 44: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
714 read_map_scroll_b(0, line, context); |
|
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 45: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
717 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
718 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
719 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
720 case 46: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
721 render_map_3(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
722 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
723 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
724 case 47: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
725 render_map_output(line, 0, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
727 //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
|
728 //filled rather than the number of available slots |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
729 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
|
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
730 context->cur_slot = MAX_SPRITES_LINE-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
731 context->sprite_draws = MAX_DRAWS; |
|
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
732 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
733 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
734 COLUMN_RENDER_BLOCK(2, 48) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
735 COLUMN_RENDER_BLOCK(4, 56) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 COLUMN_RENDER_BLOCK(6, 64) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
738 COLUMN_RENDER_BLOCK(10, 80) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
739 COLUMN_RENDER_BLOCK(12, 88) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 COLUMN_RENDER_BLOCK(14, 96) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
742 COLUMN_RENDER_BLOCK(18, 112) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
743 COLUMN_RENDER_BLOCK(20, 120) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 COLUMN_RENDER_BLOCK(22, 128) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
745 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
746 COLUMN_RENDER_BLOCK(26, 144) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
747 COLUMN_RENDER_BLOCK(28, 152) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 COLUMN_RENDER_BLOCK(30, 160) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 COLUMN_RENDER_BLOCK(34, 176) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
751 COLUMN_RENDER_BLOCK(36, 184) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
752 COLUMN_RENDER_BLOCK(38, 192) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
753 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
754 case 208: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
755 case 209: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
756 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 default: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
759 //leftovers from HSYNC clock change nonsense |
|
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 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
762 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
763 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
764 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
|
765 { |
| 37 | 766 uint16_t address; |
| 767 uint32_t mask; | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
768 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
769 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
770 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
771 case 0: |
| 37 | 772 context->cur_slot = MAX_DRAWS_H32-1; |
| 773 memset(context->linebuf, 0, LINEBUF_SIZE); | |
| 774 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
775 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
776 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
777 case 2: |
| 37 | 778 case 3: |
| 779 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
780 break; |
| 37 | 781 //sprite attribute table scan starts |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
782 case 4: |
| 37 | 783 render_sprite_cells( context); |
| 784 context->sprite_index = 0x80; | |
| 785 context->slot_counter = MAX_SPRITES_LINE_H32; | |
| 786 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
787 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
788 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
789 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
790 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
791 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
792 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
793 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
794 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
795 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
796 case 13: |
| 37 | 797 render_sprite_cells(context); |
| 798 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
799 case 14: |
| 37 | 800 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
801 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
802 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
803 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
804 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
805 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
806 case 19: |
| 37 | 807 //HSYNC start |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
808 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
809 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
810 case 22: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
811 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
812 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
813 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
814 case 26: |
| 37 | 815 render_sprite_cells(context); |
| 816 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
817 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
818 case 27: |
| 37 | 819 external_slot(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 28: |
| 37 | 822 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
| 823 mask = 0; | |
| 824 if (context->regs[REG_MODE_3] & 0x2) { | |
| 825 mask |= 0xF8; | |
| 826 } | |
| 827 if (context->regs[REG_MODE_3] & 0x1) { | |
| 828 mask |= 0x7; | |
| 829 } | |
| 830 line &= mask; | |
| 831 address += line * 4; | |
| 832 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
| 833 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
| 834 //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
|
835 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
836 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
837 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
838 case 31: |
| 37 | 839 case 32: |
| 840 render_sprite_cells(context); | |
| 841 scan_sprite_table(line, context); | |
|
20
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|
842 break; |
| 37 | 843 //!HSYNC high |
|
20
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|
844 case 33: |
| 37 | 845 read_map_scroll_a(0, line, context); |
|
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diff
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|
846 break; |
|
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diff
changeset
|
847 case 34: |
| 37 | 848 render_sprite_cells(context); |
| 849 scan_sprite_table(line, context); | |
|
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|
850 break; |
|
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|
851 case 35: |
| 37 | 852 render_map_1(context); |
| 853 scan_sprite_table(line, context);//Just a guess | |
|
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changeset
|
854 break; |
|
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Mike Pavone <pavone@retrodev.com>
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diff
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|
855 case 36: |
| 37 | 856 render_map_2(context); |
| 857 scan_sprite_table(line, context);//Just a guess | |
|
20
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diff
changeset
|
858 break; |
|
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changeset
|
859 case 37: |
| 37 | 860 read_map_scroll_b(0, line, context); |
|
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|
861 break; |
|
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|
862 case 38: |
| 37 | 863 render_sprite_cells(context); |
| 864 scan_sprite_table(line, context); | |
|
20
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|
865 break; |
|
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|
866 case 39: |
| 37 | 867 render_map_3(context); |
| 868 scan_sprite_table(line, context);//Just a guess | |
|
20
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|
869 break; |
|
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Mike Pavone <pavone@retrodev.com>
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diff
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|
870 case 40: |
| 37 | 871 render_map_output(line, 0, context); |
| 872 scan_sprite_table(line, context);//Just a guess | |
| 873 //reverse context slot counter so it counts the number of sprite slots | |
| 874 //filled rather than the number of available slots | |
| 875 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
| 876 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
| 877 context->sprite_draws = MAX_DRAWS_H32; | |
| 878 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
|
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|
879 break; |
| 37 | 880 COLUMN_RENDER_BLOCK(2, 41) |
| 881 COLUMN_RENDER_BLOCK(4, 49) | |
| 882 COLUMN_RENDER_BLOCK(6, 57) | |
| 883 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
| 884 COLUMN_RENDER_BLOCK(10, 73) | |
| 885 COLUMN_RENDER_BLOCK(12, 81) | |
| 886 COLUMN_RENDER_BLOCK(14, 89) | |
| 887 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
| 888 COLUMN_RENDER_BLOCK(18, 105) | |
| 889 COLUMN_RENDER_BLOCK(20, 113) | |
| 890 COLUMN_RENDER_BLOCK(22, 121) | |
| 891 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
| 892 COLUMN_RENDER_BLOCK(26, 137) | |
| 893 COLUMN_RENDER_BLOCK(28, 145) | |
| 894 COLUMN_RENDER_BLOCK(30, 153) | |
| 895 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
|
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|
896 case 169: |
|
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|
897 case 170: |
| 37 | 898 external_slot(context); |
|
20
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diff
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|
899 break; |
|
f664eeb55cb4
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diff
changeset
|
900 } |
|
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diff
changeset
|
901 } |
|
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diff
changeset
|
902 void latch_mode(vdp_context * context) |
|
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diff
changeset
|
903 { |
|
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parents:
diff
changeset
|
904 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
905 } |
|
f664eeb55cb4
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diff
changeset
|
906 |
|
54
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43
diff
changeset
|
907 int is_refresh(vdp_context * context) |
|
3b79cbcf6846
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43
diff
changeset
|
908 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
909 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
3b79cbcf6846
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43
diff
changeset
|
910 if (context->latched_mode & BIT_H40) { |
|
3b79cbcf6846
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43
diff
changeset
|
911 linecyc = linecyc/16; |
|
3b79cbcf6846
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43
diff
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|
912 return (linecyc == 73 || linecyc == 105 || linecyc == 137 || linecyc == 169 || linecyc == 201); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
913 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
914 linecyc = linecyc/20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
915 return (linecyc == 66 || linecyc == 98 || linecyc == 130 || linecyc == 162); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
916 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
917 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
918 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
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|
919 void check_render_bg(vdp_context * context, int32_t line) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
920 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
921 if (line > 0) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
922 line -= 1; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
923 uint16_t * start = NULL, *end = NULL; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
924 uint32_t linecyc = (context->cycles % MCLKS_LINE); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
925 if (context->latched_mode & BIT_H40) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
926 linecyc /= 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
927 if (linecyc >= 55 && linecyc <= 207 && !((linecyc-55) % 8)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
928 uint32_t x = ((linecyc-55)&(~0xF))*2; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
929 start = context->framebuf + line * 320 + x; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
930 end = start + 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
931 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
932 } else { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
933 linecyc /= 20; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
934 if (linecyc >= 48 && linecyc <= 168 && !((linecyc-48) % 8)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
935 uint32_t x = ((linecyc-48)&(~0xF))*2; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
936 start = context->framebuf + line * 256 + x; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
937 end = start + 16; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
938 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
939 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
940 while (start != end) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
941 *start = context->regs[REG_BG_COLOR] & 0x3F; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
942 ++start; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
943 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
944 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
945 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
946 |
|
20
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diff
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|
947 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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diff
changeset
|
948 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
949 while(context->cycles < target_cycles) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
950 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
951 uint32_t line = context->cycles / MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
952 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
953 if (!line) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
954 latch_mode(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
955 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
956 if (line < active_lines && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { |
|
20
f664eeb55cb4
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parents:
diff
changeset
|
957 //first sort-of active line is treated as 255 internally |
|
f664eeb55cb4
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
958 //it's used for gathering sprite info for line |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
959 line = (line - 1) & 0xFF; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
960 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
961 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
962 //Convert to slot number |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
963 if (context->latched_mode & BIT_H40){ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
964 //TODO: Deal with nasty clock switching during HBLANK |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
965 linecyc = linecyc/16; |
|
54
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43
diff
changeset
|
966 vdp_h40(line, linecyc, context); |
|
20
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diff
changeset
|
967 context->cycles += 16; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
968 } else { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
969 linecyc = linecyc/20; |
|
54
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
970 vdp_h32(line, linecyc, context); |
|
20
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parents:
diff
changeset
|
971 context->cycles += 20; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
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parents:
diff
changeset
|
972 } |
|
f664eeb55cb4
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parents:
diff
changeset
|
973 } else { |
|
54
3b79cbcf6846
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parents:
43
diff
changeset
|
974 if (!is_refresh(context)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
975 external_slot(context); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
976 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
977 if (line < active_lines) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
978 check_render_bg(context, line); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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parents:
43
diff
changeset
|
979 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
980 if (context->latched_mode & BIT_H40){ |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
981 //TODO: Deal with nasty clock switching during HBLANK |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
43
diff
changeset
|
982 context->cycles += 16; |
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983 } else { |
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984 context->cycles += 20; |
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985 } |
|
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986 } |
|
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987 } |
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988 } |
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989 |
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990 uint32_t vdp_run_to_vblank(vdp_context * context) |
|
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991 { |
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992 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
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993 vdp_run_context(context, target_cycles); |
|
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994 return context->cycles; |
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995 } |
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996 |
| 75 | 997 void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) |
| 998 { | |
| 999 for(;;) { | |
| 1000 uint32_t dmalen = (context->regs[REG_DMALEN_H] << 8) | context->regs[REG_DMALEN_L]; | |
| 1001 if (!dmalen) { | |
| 1002 dmalen = 0x10000; | |
| 1003 } | |
| 1004 uint32_t min_dma_complete = dmalen * (context->latched_mode & BIT_H40 ? 16 : 20); | |
| 1005 if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { | |
| 1006 //DMA copies take twice as long to complete since they require a read and a write | |
| 1007 //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word | |
| 1008 min_dma_complete *= 2; | |
| 1009 } | |
| 1010 min_dma_complete += context->cycles; | |
| 1011 if (target_cycles < min_dma_complete) { | |
| 1012 vdp_run_context(context, target_cycles); | |
| 1013 return; | |
| 1014 } else { | |
| 1015 vdp_run_context(context, min_dma_complete); | |
| 1016 if (!(context->flags & FLAG_DMA_RUN)) { | |
| 1017 return; | |
| 1018 } | |
| 1019 } | |
| 1020 } | |
| 1021 } | |
| 1022 | |
| 1023 int vdp_control_port_write(vdp_context * context, uint16_t value) | |
|
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1024 { |
|
58
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1025 //printf("control port write: %X\n", value); |
|
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1026 if (context->flags & FLAG_DMA_RUN) { |
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1027 return -1; |
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1028 } |
|
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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; |
|
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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; | |
|
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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 } |
|
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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); |
|
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1050 context->regs[reg] = value; |
|
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1051 if (reg == REG_MODE_2) { |
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1052 //printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
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1053 } |
|
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1054 } |
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1055 } else { |
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1056 context->flags |= FLAG_PENDING; |
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1057 context->address = (context->address &0xC000) | (value & 0x3FFF); |
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1058 context->cd = (context->cd &0x3C) | (value >> 14); |
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1059 } |
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1060 } |
| 75 | 1061 return 0; |
|
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1062 } |
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1063 |
|
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1064 int vdp_data_port_write(vdp_context * context, uint16_t value) |
|
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1065 { |
|
58
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|
1066 //printf("data port write: %X\n", value); |
|
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1067 if (context->flags & FLAG_DMA_RUN) { |
|
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|
1068 return -1; |
|
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1069 } |
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1070 if (!(context->cd & 1)) { |
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1071 //ignore writes when cd is configured for read |
|
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1072 return 0; |
|
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1073 } |
|
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|
1074 context->flags &= ~FLAG_PENDING; |
|
109
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1075 /*if (context->fifo_cur == context->fifo_end) { |
|
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1076 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
|
109
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1077 }*/ |
|
54
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1078 while (context->fifo_cur == context->fifo_end) { |
|
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|
1079 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
|
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1080 } |
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|
1081 context->fifo_cur->cycle = context->cycles; |
| 138 | 1082 context->fifo_cur->address = context->address; |
|
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|
1083 context->fifo_cur->value = value; |
| 138 | 1084 context->fifo_cur->cd = context->cd; |
|
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|
1085 context->fifo_cur->partial = 0; |
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|
1086 context->fifo_cur++; |
| 138 | 1087 context->address += context->regs[REG_AUTOINC]; |
|
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1088 return 0; |
|
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|
1089 } |
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1090 |
|
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|
1091 uint16_t vdp_control_port_read(vdp_context * context) |
|
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1092 { |
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1093 context->flags &= ~FLAG_PENDING; |
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1094 uint16_t value = 0x3400; |
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1095 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
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1096 value |= 0x200; |
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1097 } |
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1098 if (context->fifo_cur == context->fifo_end) { |
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1099 value |= 0x100; |
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1100 } |
|
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1101 if (context->flags & FLAG_DMA_RUN) { |
|
141
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|
1102 value |= 0x2; |
| 75 | 1103 } |
| 137 | 1104 uint32_t line= context->cycles / MCLKS_LINE; |
| 1105 if (line >= (context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE)) { | |
| 1106 value |= 0x8; | |
| 1107 } | |
|
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1108 //TODO: Lots of other bits in status port |
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1109 return value; |
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1110 } |
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1111 |
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1112 uint16_t vdp_data_port_read(vdp_context * context) |
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1113 { |
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1114 context->flags &= ~FLAG_PENDING; |
| 138 | 1115 if (context->cd & 1) { |
|
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1116 return 0; |
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1117 } |
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1118 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
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1119 context->flags &= ~FLAG_UNUSED_SLOT; |
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1120 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1121 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1122 } |
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1123 uint16_t value = 0; |
| 138 | 1124 switch (context->cd & 0xF) |
|
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1125 { |
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1126 case VRAM_READ: |
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1127 value = context->vdpmem[context->address] << 8; |
|
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1128 context->flags &= ~FLAG_UNUSED_SLOT; |
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1129 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
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1130 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
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1131 } |
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1132 value |= context->vdpmem[context->address ^ 1]; |
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1133 break; |
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1134 case CRAM_READ: |
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1135 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
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1136 break; |
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1137 case VSRAM_READ: |
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1138 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
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1139 value = context->vsram[context->address & 63]; |
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1140 } |
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1141 break; |
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1142 } |
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1143 context->address += context->regs[REG_AUTOINC]; |
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1144 return value; |
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1145 } |
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1146 |
| 137 | 1147 uint16_t vdp_hv_counter_read(vdp_context * context) |
| 1148 { | |
| 1149 uint32_t line= context->cycles / MCLKS_LINE; | |
| 1150 if (!line) { | |
| 1151 line = 0xFF; | |
| 1152 } else { | |
| 1153 line--; | |
| 1154 if (line > 0xEA) { | |
| 1155 line = (line + 0xFA) & 0xFF; | |
| 1156 } | |
| 1157 } | |
| 1158 uint32_t linecyc = context->cycles % MCLKS_LINE; | |
| 1159 if (context->latched_mode & BIT_H40) { | |
| 1160 linecyc /= 8; | |
| 1161 if (linecyc >= 86) { | |
| 1162 linecyc -= 86; | |
| 1163 } else { | |
| 1164 linecyc += 334; | |
| 1165 } | |
| 1166 if (linecyc > 0x16C) { | |
| 1167 linecyc += 92; | |
| 1168 } | |
| 1169 } else { | |
| 1170 linecyc /= 10; | |
| 1171 if (linecyc >= 74) { | |
| 1172 linecyc -= 74; | |
| 1173 } else { | |
| 1174 linecyc += 268; | |
| 1175 } | |
| 1176 if (linecyc > 0x127) { | |
| 1177 linecyc += 170; | |
| 1178 } | |
| 1179 } | |
| 1180 linecyc &= 0xFF; | |
| 1181 return (line << 8) | linecyc; | |
| 1182 } | |
| 1183 | |
|
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1184 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
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1185 { |
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1186 context->cycles -= deduction; |
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1187 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
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1188 if (start->cycle >= deduction) { |
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1189 start->cycle -= deduction; |
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1190 } else { |
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1191 start->cycle = 0; |
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1192 } |
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1193 } |
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1194 } |
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1195 |
|
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1196 #define GST_VDP_REGS 0xFA |
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1197 #define GST_VDP_MEM 0x12478 |
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1198 |
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1199 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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1200 { |
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1201 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1202 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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1203 fread(context->regs, 1, VDP_REGS, state_file); |
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1204 latch_mode(context); |
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1205 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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1206 for (int i = 0; i < CRAM_SIZE; i++) { |
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1207 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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1208 } |
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1209 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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1210 for (int i = 0; i < VSRAM_SIZE; i++) { |
|
23
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1211 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
|
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1212 } |
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1213 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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1214 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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1215 } |
|
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1216 |
|
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1217 void vdp_save_state(vdp_context * context, FILE * outfile) |
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1218 { |
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1219 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1220 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
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1221 fwrite(context->regs, 1, VDP_REGS, outfile); |
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1222 for (int i = 0; i < CRAM_SIZE; i++) { |
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1223 tmp_buf[i*2] = context->cram[i]; |
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1224 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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1225 } |
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1226 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
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1227 for (int i = 0; i < VSRAM_SIZE; i++) { |
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|
1228 tmp_buf[i*2] = context->vsram[i]; |
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|
1229 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
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1230 } |
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|
1231 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
|
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|
1232 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
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|
1233 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
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|
1234 } |
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|
1235 |