Mercurial > repos > blastem
annotate vdp.c @ 72:7935cd64d5c8
Implement word wide access to IO area
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Fri, 21 Dec 2012 16:04:30 -0800 |
| parents | aef6302770c2 |
| children | 108e587165c0 |
| rev | line source |
|---|---|
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1 #include "vdp.h" |
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2 #include <stdlib.h> |
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3 #include <string.h> |
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4 |
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5 #define NTSC_ACTIVE 225 |
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6 #define PAL_ACTIVE 241 |
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7 #define BUF_BIT_PRIORITY 0x40 |
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8 #define MAP_BIT_PRIORITY 0x8000 |
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9 #define MAP_BIT_H_FLIP 0x800 |
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10 #define MAP_BIT_V_FLIP 0x1000 |
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11 |
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12 #define BIT_PAL 0x8 |
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13 #define BIT_H40 0x1 |
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14 |
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15 #define SCROLL_BUFFER_SIZE 32 |
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16 #define SCROLL_BUFFER_DRAW 16 |
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17 |
| 40 | 18 #define FLAG_DOT_OFLOW 0x1 |
| 19 #define FLAG_CAN_MASK 0x2 | |
| 20 #define FLAG_MASKED 0x4 | |
| 21 #define FLAG_WINDOW 0x8 | |
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22 #define FLAG_PENDING 0x10 |
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23 #define FLAG_UNUSED_SLOT 0x20 |
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24 |
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25 #define FIFO_SIZE 4 |
| 40 | 26 |
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27 void init_vdp_context(vdp_context * context) |
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28 { |
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29 memset(context, 0, sizeof(*context)); |
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30 context->vdpmem = malloc(VRAM_SIZE); |
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31 memset(context->vdpmem, 0, VRAM_SIZE); |
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32 context->framebuf = malloc(FRAMEBUF_SIZE); |
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33 memset(context->framebuf, 0, FRAMEBUF_SIZE); |
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34 context->linebuf = malloc(LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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35 memset(context->linebuf, 0, LINEBUF_SIZE + SCROLL_BUFFER_SIZE*2); |
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36 context->tmp_buf_a = context->linebuf + LINEBUF_SIZE; |
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37 context->tmp_buf_b = context->tmp_buf_a + SCROLL_BUFFER_SIZE; |
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38 context->sprite_draws = MAX_DRAWS; |
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39 context->fifo_cur = malloc(sizeof(fifo_entry) * FIFO_SIZE); |
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40 context->fifo_end = context->fifo_cur + FIFO_SIZE; |
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41 } |
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42 |
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43 void render_sprite_cells(vdp_context * context) |
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44 { |
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45 if (context->cur_slot >= context->sprite_draws) { |
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46 sprite_draw * d = context->sprite_draw_list + context->cur_slot; |
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47 |
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48 uint16_t dir; |
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49 int16_t x; |
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50 if (d->h_flip) { |
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51 x = d->x_pos + 7; |
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52 dir = -1; |
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53 } else { |
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54 x = d->x_pos; |
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55 dir = 1; |
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56 } |
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57 //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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58 context->cur_slot--; |
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59 for (uint16_t address = d->address; address < d->address+4; address++) { |
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60 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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61 context->linebuf[x] = (context->vdpmem[address] >> 4) | d->pal_priority; |
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62 } |
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63 x += dir; |
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64 if (x >= 0 && x < 320 && !(context->linebuf[x] & 0xF)) { |
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65 context->linebuf[x] = (context->vdpmem[address] & 0xF) | d->pal_priority; |
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66 } |
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67 x += dir; |
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68 } |
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69 } |
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70 } |
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71 |
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72 void scan_sprite_table(uint32_t line, vdp_context * context) |
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73 { |
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74 if (context->sprite_index && context->slot_counter) { |
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75 line += 1; |
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76 line &= 0xFF; |
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77 context->sprite_index &= 0x7F; |
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78 if (context->latched_mode & BIT_H40) { |
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79 if (context->sprite_index >= MAX_SPRITES_FRAME) { |
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80 context->sprite_index = 0; |
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81 return; |
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82 } |
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83 } else if(context->sprite_index >= MAX_SPRITES_FRAME_H32) { |
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84 context->sprite_index = 0; |
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85 return; |
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86 } |
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87 //TODO: Read from SAT cache rather than from VRAM |
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88 uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; |
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89 uint16_t address = context->sprite_index * 8 + sat_address; |
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90 int16_t y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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91 uint8_t height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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92 //printf("Sprite %d | y: %d, height: %d\n", context->sprite_index, y, height); |
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93 if (y <= line && line < (y + height)) { |
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94 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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95 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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96 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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97 context->sprite_info_list[context->slot_counter].y = y; |
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98 } |
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99 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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100 if (context->sprite_index && context->slot_counter) |
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101 { |
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102 address = context->sprite_index * 8 + sat_address; |
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103 y = ((context->vdpmem[address] & 0x3) << 8 | context->vdpmem[address+1]) - 128; |
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104 height = ((context->vdpmem[address+2] & 0x3) + 1) * 8; |
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105 if (y <= line && line < (y + height)) { |
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106 //printf("Sprite %d at y: %d with height %d is on line %d\n", context->sprite_index, y, height, line); |
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107 context->sprite_info_list[--(context->slot_counter)].size = context->vdpmem[address+2]; |
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108 context->sprite_info_list[context->slot_counter].index = context->sprite_index; |
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109 context->sprite_info_list[context->slot_counter].y = y; |
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110 } |
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111 context->sprite_index = context->vdpmem[address+3] & 0x7F; |
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112 } |
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113 } |
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114 } |
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115 |
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116 void read_sprite_x(uint32_t line, vdp_context * context) |
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117 { |
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118 if (context->cur_slot >= context->slot_counter) { |
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119 if (context->sprite_draws) { |
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120 line += 1; |
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121 line &= 0xFF; |
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122 //in tiles |
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123 uint8_t width = ((context->sprite_info_list[context->cur_slot].size >> 2) & 0x3) + 1; |
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124 //in pixels |
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125 uint8_t height = ((context->sprite_info_list[context->cur_slot].size & 0x3) + 1) * 8; |
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126 uint16_t att_addr = ((context->regs[REG_SAT] & 0x7F) << 9) + context->sprite_info_list[context->cur_slot].index * 8 + 4; |
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127 uint16_t tileinfo = (context->vdpmem[att_addr] << 8) | context->vdpmem[att_addr+1]; |
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128 uint8_t pal_priority = (tileinfo >> 9) & 0x70; |
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129 uint8_t row; |
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130 if (tileinfo & MAP_BIT_V_FLIP) { |
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131 row = (context->sprite_info_list[context->cur_slot].y + height - 1) - line; |
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132 } else { |
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133 row = line-context->sprite_info_list[context->cur_slot].y; |
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134 } |
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135 uint16_t address = ((tileinfo & 0x7FF) << 5) + row * 4; |
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136 int16_t x = ((context->vdpmem[att_addr+ 2] & 0x3) << 8) | context->vdpmem[att_addr + 3]; |
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137 if (x) { |
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138 context->flags |= FLAG_CAN_MASK; |
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139 } else if(context->flags & (FLAG_CAN_MASK | FLAG_DOT_OFLOW)) { |
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140 context->flags |= FLAG_MASKED; |
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141 } |
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142 |
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143 context->flags &= ~FLAG_DOT_OFLOW; |
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144 int16_t i; |
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145 if (context->flags & FLAG_MASKED) { |
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146 for (i=0; i < width && context->sprite_draws; i++) { |
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147 --context->sprite_draws; |
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148 context->sprite_draw_list[context->sprite_draws].x_pos = -128; |
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149 } |
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150 } else { |
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151 x -= 128; |
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152 int16_t base_x = x; |
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153 int16_t dir; |
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154 if (tileinfo & MAP_BIT_H_FLIP) { |
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155 x += (width-1) * 8; |
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156 dir = -8; |
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157 } else { |
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158 dir = 8; |
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159 } |
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160 //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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161 for (i=0; i < width && context->sprite_draws; i++, x += dir) { |
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162 --context->sprite_draws; |
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163 context->sprite_draw_list[context->sprite_draws].address = address + i * height * 4; |
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164 context->sprite_draw_list[context->sprite_draws].x_pos = x; |
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165 context->sprite_draw_list[context->sprite_draws].pal_priority = pal_priority; |
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166 context->sprite_draw_list[context->sprite_draws].h_flip = (tileinfo & MAP_BIT_H_FLIP) ? 1 : 0; |
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167 } |
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168 } |
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169 if (i < width) { |
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170 context->flags |= FLAG_DOT_OFLOW; |
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171 } |
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172 context->cur_slot--; |
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173 } else { |
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174 context->flags |= FLAG_DOT_OFLOW; |
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175 } |
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176 } |
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177 } |
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178 |
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179 #define VRAM_READ 0 |
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180 #define VRAM_WRITE 1 |
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181 #define CRAM_READ 8 |
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182 #define CRAM_WRITE 3 |
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183 #define VSRAM_READ 4 |
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184 #define VSRAM_WRITE 5 |
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185 |
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186 void external_slot(vdp_context * context) |
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187 { |
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188 fifo_entry * start = (context->fifo_end - FIFO_SIZE); |
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189 //TODO: Implement DMA |
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190 if (context->fifo_cur != start && start->cycle <= context->cycles) { |
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191 switch (context->cd & 0x7) |
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192 { |
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193 case VRAM_WRITE: |
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194 if (start->partial) { |
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195 //printf("VRAM Write: %X to %X\n", start->value, context->address ^ 1); |
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196 context->vdpmem[context->address ^ 1] = start->value; |
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197 } else { |
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198 //printf("VRAM Write High: %X to %X\n", start->value >> 8, context->address); |
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199 context->vdpmem[context->address] = start->value >> 8; |
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200 start->partial = 1; |
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201 //skip auto-increment and removal of entry from fifo |
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202 return; |
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203 } |
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204 break; |
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205 case CRAM_WRITE: |
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206 //printf("CRAM Write: %X to %X\n", start->value, context->address); |
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207 context->cram[(context->address/2) & (CRAM_SIZE-1)] = start->value; |
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208 break; |
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209 case VSRAM_WRITE: |
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210 if (((context->address/2) & 63) < VSRAM_SIZE) { |
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211 //printf("VSRAM Write: %X to %X\n", start->value, context->address); |
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212 context->vsram[(context->address/2) & 63] = start->value; |
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213 } |
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214 break; |
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215 } |
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216 context->address += context->regs[REG_AUTOINC]; |
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217 fifo_entry * cur = start+1; |
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218 if (cur < context->fifo_cur) { |
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219 memmove(start, cur, sizeof(fifo_entry) * (context->fifo_cur - cur)); |
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220 } |
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221 context->fifo_cur -= 1; |
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222 } else { |
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223 context->flags |= FLAG_UNUSED_SLOT; |
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224 } |
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225 } |
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226 |
| 40 | 227 #define WINDOW_RIGHT 0x80 |
| 228 #define WINDOW_DOWN 0x80 | |
| 229 | |
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230 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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231 { |
| 40 | 232 if (!vsram_off) { |
| 233 uint16_t left_col, right_col; | |
| 234 if (context->regs[REG_WINDOW_H] & WINDOW_RIGHT) { | |
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235 left_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; |
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236 right_col = 42; |
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237 } else { |
| 40 | 238 left_col = 0; |
| 239 right_col = (context->regs[REG_WINDOW_H] & 0x1F) * 2; | |
| 240 if (right_col) { | |
| 241 right_col += 2; | |
| 242 } | |
| 243 } | |
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244 uint16_t top_line, bottom_line; |
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245 if (context->regs[REG_WINDOW_V] & WINDOW_DOWN) { |
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246 top_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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247 bottom_line = 241; |
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248 } else { |
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249 top_line = 0; |
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250 bottom_line = (context->regs[REG_WINDOW_V] & 0x1F) * 8; |
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251 } |
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252 if ((column >= left_col && column < right_col) || (line >= top_line && line < bottom_line)) { |
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253 uint16_t address = context->regs[REG_WINDOW] << 10; |
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254 uint16_t line_offset, offset, mask; |
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255 if (context->latched_mode & BIT_H40) { |
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256 address &= 0xF000; |
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257 line_offset = (((line) / 8) * 64 * 2) & 0xFFF; |
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258 mask = 0x7F; |
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259 |
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260 } else { |
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261 address &= 0xF800; |
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262 line_offset = (((line) / 8) * 32 * 2) & 0xFFF; |
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263 mask = 0x3F; |
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264 } |
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265 offset = address + line_offset + (((column - 2) * 2) & mask); |
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266 context->col_1 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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267 //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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268 offset = address + line_offset + (((column - 1) * 2) & mask); |
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269 context->col_2 = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
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270 context->v_offset = (line) & 0x7; |
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271 context->flags |= FLAG_WINDOW; |
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272 return; |
| 40 | 273 } |
| 274 context->flags &= ~FLAG_WINDOW; | |
| 275 } | |
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276 uint16_t vscroll; |
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277 switch(context->regs[REG_SCROLL] & 0x30) |
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278 { |
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279 case 0: |
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280 vscroll = 0xFF; |
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281 break; |
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282 case 0x10: |
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283 vscroll = 0x1FF; |
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284 break; |
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285 case 0x20: |
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286 //TODO: Verify this behavior |
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287 vscroll = 0; |
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288 break; |
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289 case 0x30: |
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290 vscroll = 0x3FF; |
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291 break; |
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292 } |
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293 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); |
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294 context->v_offset = vscroll & 0x7; |
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295 //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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296 vscroll /= 8; |
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297 uint16_t hscroll_mask; |
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298 uint16_t v_mul; |
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299 switch(context->regs[REG_SCROLL] & 0x3) |
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300 { |
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301 case 0: |
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302 hscroll_mask = 0xF0; |
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303 v_mul = 64; |
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304 break; |
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305 case 0x1: |
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306 hscroll_mask = 0x3F; |
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307 v_mul = 128; |
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308 break; |
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309 case 0x2: |
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310 //TODO: Verify this behavior |
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311 hscroll_mask = 0; |
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312 v_mul = 0; |
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313 break; |
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314 case 0x3: |
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315 hscroll_mask = 0x3F0; |
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316 v_mul = 256; |
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317 break; |
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318 } |
| 28 | 319 uint16_t hscroll, offset; |
| 320 for (int i = 0; i < 2; i++) { | |
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321 hscroll = (column - 2 + i - ((hscroll_val/8) & 0xFFFE)) & hscroll_mask; |
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322 offset = address + ((vscroll * v_mul + hscroll*2) & 0x1FFF); |
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323 //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 | 324 uint16_t col_val = (context->vdpmem[offset] << 8) | context->vdpmem[offset+1]; |
| 325 if (i) { | |
| 326 context->col_2 = col_val; | |
| 327 } else { | |
| 328 context->col_1 = col_val; | |
| 329 } | |
| 330 } | |
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331 } |
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332 |
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333 void read_map_scroll_a(uint16_t column, uint32_t line, vdp_context * context) |
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334 { |
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335 read_map_scroll(column, 0, line, (context->regs[REG_SCROLL_A] & 0x38) << 10, context->hscroll_a, context); |
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336 } |
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337 |
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338 void read_map_scroll_b(uint16_t column, uint32_t line, vdp_context * context) |
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339 { |
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340 read_map_scroll(column, 1, line, (context->regs[REG_SCROLL_B] & 0x7) << 13, context->hscroll_b, context); |
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341 } |
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342 |
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343 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) |
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344 { |
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345 uint16_t address = ((col & 0x7FF) << 5); |
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346 if (col & MAP_BIT_V_FLIP) { |
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347 address += 28 - 4 * context->v_offset; |
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348 } else { |
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349 address += 4 * context->v_offset; |
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350 } |
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351 uint16_t pal_priority = (col >> 9) & 0x70; |
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352 int32_t dir; |
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353 if (col & MAP_BIT_H_FLIP) { |
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354 tmp_buf += 7; |
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355 dir = -1; |
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356 } else { |
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357 dir = 1; |
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358 } |
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359 for (uint32_t i=0; i < 4; i++, address++) |
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360 { |
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361 *tmp_buf = pal_priority | (context->vdpmem[address] >> 4); |
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362 tmp_buf += dir; |
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363 *tmp_buf = pal_priority | (context->vdpmem[address] & 0xF); |
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364 tmp_buf += dir; |
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365 } |
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366 } |
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367 |
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368 void render_map_1(vdp_context * context) |
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369 { |
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370 render_map(context->col_1, context->tmp_buf_a+SCROLL_BUFFER_DRAW, context); |
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371 } |
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372 |
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373 void render_map_2(vdp_context * context) |
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374 { |
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375 render_map(context->col_2, context->tmp_buf_a+SCROLL_BUFFER_DRAW+8, context); |
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376 } |
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377 |
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378 void render_map_3(vdp_context * context) |
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379 { |
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380 render_map(context->col_1, context->tmp_buf_b+SCROLL_BUFFER_DRAW, context); |
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381 } |
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382 |
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383 void render_map_output(uint32_t line, int32_t col, vdp_context * context) |
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384 { |
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385 if (line >= 240) { |
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386 return; |
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387 } |
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388 render_map(context->col_2, context->tmp_buf_b+SCROLL_BUFFER_DRAW+8, context); |
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389 uint16_t *dst, *end; |
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390 uint8_t *sprite_buf, *plane_a, *plane_b; |
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391 if (col) |
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392 { |
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393 col-=2; |
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394 dst = context->framebuf + line * 320 + col * 8; |
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395 sprite_buf = context->linebuf + col * 8; |
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396 uint16_t a_src; |
| 40 | 397 if (context->flags & FLAG_WINDOW) { |
| 398 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; | |
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399 a_src = FBUF_SRC_W; |
| 40 | 400 } else { |
| 401 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); | |
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402 a_src = FBUF_SRC_A; |
| 40 | 403 } |
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404 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); |
| 30 | 405 end = dst + 16; |
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406 uint16_t src; |
| 30 | 407 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); |
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408 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { |
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409 uint8_t pixel; |
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410 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { |
|
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411 pixel = *sprite_buf; |
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412 src = FBUF_SRC_S; |
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413 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { |
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414 pixel = *plane_a; |
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415 src = a_src; |
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416 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { |
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417 pixel = *plane_b; |
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418 src = FBUF_SRC_B; |
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419 } else if (*sprite_buf & 0xF) { |
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420 pixel = *sprite_buf; |
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421 src = FBUF_SRC_S; |
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422 } else if (*plane_a & 0xF) { |
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423 pixel = *plane_a; |
|
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424 src = a_src; |
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425 } else if (*plane_b & 0xF){ |
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426 pixel = *plane_b; |
|
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427 src = FBUF_SRC_B; |
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428 } else { |
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429 pixel = context->regs[REG_BG_COLOR] & 0x3F; |
|
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430 src = FBUF_SRC_BG; |
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431 } |
|
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432 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src; |
|
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433 } |
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434 } else { |
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435 //dst = context->framebuf + line * 320; |
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436 //sprite_buf = context->linebuf + col * 8; |
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437 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); |
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438 //plane_b = context->tmp_buf_b + 16 - (context->hscroll_b & 0x7); |
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439 //end = dst + 8; |
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440 } |
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441 |
| 40 | 442 uint16_t remaining; |
| 443 if (!(context->flags & FLAG_WINDOW)) { | |
| 444 remaining = context->hscroll_a & 0xF; | |
| 445 memcpy(context->tmp_buf_a + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_a + SCROLL_BUFFER_SIZE - remaining, remaining); | |
| 446 } | |
|
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|
447 remaining = context->hscroll_b & 0xF; |
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|
448 memcpy(context->tmp_buf_b + SCROLL_BUFFER_DRAW - remaining, context->tmp_buf_b + SCROLL_BUFFER_SIZE - remaining, remaining); |
|
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449 } |
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450 |
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451 #define COLUMN_RENDER_BLOCK(column, startcyc) \ |
|
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452 case startcyc:\ |
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453 read_map_scroll_a(column, line, context);\ |
|
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|
454 break;\ |
|
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455 case (startcyc+1):\ |
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456 external_slot(context);\ |
|
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|
457 break;\ |
|
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|
458 case (startcyc+2):\ |
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459 render_map_1(context);\ |
|
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|
460 break;\ |
|
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|
461 case (startcyc+3):\ |
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462 render_map_2(context);\ |
|
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463 break;\ |
|
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464 case (startcyc+4):\ |
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465 read_map_scroll_b(column, line, context);\ |
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|
466 break;\ |
|
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|
467 case (startcyc+5):\ |
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|
468 read_sprite_x(line, context);\ |
|
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|
469 break;\ |
|
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|
470 case (startcyc+6):\ |
|
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diff
changeset
|
471 render_map_3(context);\ |
|
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
472 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
473 case (startcyc+7):\ |
|
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
474 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 |
|
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Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
477 #define COLUMN_RENDER_BLOCK_REFRESH(column, startcyc) \ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 case startcyc:\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 read_map_scroll_a(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 case (startcyc+1):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 case (startcyc+2):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 render_map_1(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 case (startcyc+3):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 render_map_2(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
489 case (startcyc+4):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
490 read_map_scroll_b(column, line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
491 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
492 case (startcyc+5):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 read_sprite_x(line, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
495 case (startcyc+6):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
496 render_map_3(context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 break;\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
498 case (startcyc+7):\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
499 render_map_output(line, column, context);\ |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
500 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
501 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 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
|
503 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
504 uint16_t address; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 uint32_t mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 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
|
510 context->cur_slot = MAX_DRAWS-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 memset(context->linebuf, 0, LINEBUF_SIZE); |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
512 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
513 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
514 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
515 case 2: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 case 3: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
517 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 //sprite attribute table scan starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
520 case 4: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
521 render_sprite_cells( context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
522 context->sprite_index = 0x80; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
523 context->slot_counter = MAX_SPRITES_LINE; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
524 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
525 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
526 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
527 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
528 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
529 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
530 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
531 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
532 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
533 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
534 case 13: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
535 case 14: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
536 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
537 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
538 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
539 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
540 case 19: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
541 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
542 //!HSYNC asserted |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
543 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
544 case 22: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
545 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
546 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
547 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
548 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
549 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
550 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
551 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
552 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
553 case 26: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 case 27: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
555 case 28: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
556 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
557 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
558 case 31: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 case 32: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
560 case 33: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
561 case 34: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
562 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 case 35: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
566 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
567 mask = 0; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
568 if (context->regs[REG_MODE_3] & 0x2) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
569 mask |= 0xF8; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
570 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 if (context->regs[REG_MODE_3] & 0x1) { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 mask |= 0x7; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
573 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
574 line &= mask; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
575 address += line * 4; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
576 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
|
577 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
|
578 //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
|
579 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 case 36: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 //!HSYNC high |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 case 37: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 case 38: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 case 39: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
585 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 case 40: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 read_map_scroll_a(0, 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 41: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
592 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
593 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
595 case 42: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 render_map_1(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
597 scan_sprite_table(line, context);//Just a guess |
|
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 43: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
600 render_map_2(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
601 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
602 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
603 case 44: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
604 read_map_scroll_b(0, line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
605 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
606 case 45: |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
607 render_sprite_cells(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
608 scan_sprite_table(line, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
609 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
610 case 46: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
611 render_map_3(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
612 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 case 47: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 render_map_output(line, 0, context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 scan_sprite_table(line, context);//Just a guess |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
617 //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
|
618 //filled rather than the number of available slots |
|
21
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
619 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; |
|
72ce60cb1711
Sprites somewhat less broken
Mike Pavone <pavone@retrodev.com>
parents:
20
diff
changeset
|
620 context->cur_slot = MAX_SPRITES_LINE-1; |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
621 context->sprite_draws = MAX_DRAWS; |
|
36
04672c060062
Pass all sprite masking tests
Mike Pavone <pavone@retrodev.com>
parents:
35
diff
changeset
|
622 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); |
|
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 COLUMN_RENDER_BLOCK(2, 48) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 COLUMN_RENDER_BLOCK(4, 56) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
626 COLUMN_RENDER_BLOCK(6, 64) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 COLUMN_RENDER_BLOCK_REFRESH(8, 72) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
628 COLUMN_RENDER_BLOCK(10, 80) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 COLUMN_RENDER_BLOCK(12, 88) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 COLUMN_RENDER_BLOCK(14, 96) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 COLUMN_RENDER_BLOCK_REFRESH(16, 104) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 COLUMN_RENDER_BLOCK(18, 112) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 COLUMN_RENDER_BLOCK(20, 120) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 COLUMN_RENDER_BLOCK(22, 128) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 COLUMN_RENDER_BLOCK_REFRESH(24, 136) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 COLUMN_RENDER_BLOCK(26, 144) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 COLUMN_RENDER_BLOCK(28, 152) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
638 COLUMN_RENDER_BLOCK(30, 160) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 COLUMN_RENDER_BLOCK_REFRESH(32, 168) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 COLUMN_RENDER_BLOCK(34, 176) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 COLUMN_RENDER_BLOCK(36, 184) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 COLUMN_RENDER_BLOCK(38, 192) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 COLUMN_RENDER_BLOCK_REFRESH(40, 200) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 case 208: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 case 209: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 external_slot(context); |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
648 default: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 //leftovers from HSYNC clock change nonsense |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 } |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 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
|
655 { |
| 37 | 656 uint16_t address; |
| 657 uint32_t mask; | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 switch(linecyc) |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
659 { |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
660 //sprite render to line buffer starts |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
661 case 0: |
| 37 | 662 context->cur_slot = MAX_DRAWS_H32-1; |
| 663 memset(context->linebuf, 0, LINEBUF_SIZE); | |
| 664 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
665 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
666 case 1: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
667 case 2: |
| 37 | 668 case 3: |
| 669 render_sprite_cells(context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
670 break; |
| 37 | 671 //sprite attribute table scan starts |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
672 case 4: |
| 37 | 673 render_sprite_cells( context); |
| 674 context->sprite_index = 0x80; | |
| 675 context->slot_counter = MAX_SPRITES_LINE_H32; | |
| 676 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
677 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
678 case 5: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
679 case 6: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
680 case 7: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
681 case 8: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
682 case 9: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
683 case 10: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
684 case 11: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
685 case 12: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
686 case 13: |
| 37 | 687 render_sprite_cells(context); |
| 688 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
689 case 14: |
| 37 | 690 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
691 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
692 case 15: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
693 case 16: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
694 case 17: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
695 case 18: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
696 case 19: |
| 37 | 697 //HSYNC start |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
698 case 20: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
699 case 21: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
700 case 22: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
701 case 23: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
702 case 24: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
703 case 25: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
704 case 26: |
| 37 | 705 render_sprite_cells(context); |
| 706 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
707 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
708 case 27: |
| 37 | 709 external_slot(context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
710 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
711 case 28: |
| 37 | 712 address = (context->regs[REG_HSCROLL] & 0x3F) << 10; |
| 713 mask = 0; | |
| 714 if (context->regs[REG_MODE_3] & 0x2) { | |
| 715 mask |= 0xF8; | |
| 716 } | |
| 717 if (context->regs[REG_MODE_3] & 0x1) { | |
| 718 mask |= 0x7; | |
| 719 } | |
| 720 line &= mask; | |
| 721 address += line * 4; | |
| 722 context->hscroll_a = context->vdpmem[address] << 8 | context->vdpmem[address+1]; | |
| 723 context->hscroll_b = context->vdpmem[address+2] << 8 | context->vdpmem[address+3]; | |
| 724 //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
|
725 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
726 case 29: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
727 case 30: |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
728 case 31: |
| 37 | 729 case 32: |
| 730 render_sprite_cells(context); | |
| 731 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
732 break; |
| 37 | 733 //!HSYNC high |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
734 case 33: |
| 37 | 735 read_map_scroll_a(0, line, context); |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
736 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
737 case 34: |
| 37 | 738 render_sprite_cells(context); |
| 739 scan_sprite_table(line, context); | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
740 break; |
|
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
741 case 35: |
| 37 | 742 render_map_1(context); |
| 743 scan_sprite_table(line, context);//Just a guess | |
|
20
f664eeb55cb4
Mostly broken VDP core and savestate viewer
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
744 break; |
|
f664eeb55cb4
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|
745 case 36: |
| 37 | 746 render_map_2(context); |
| 747 scan_sprite_table(line, context);//Just a guess | |
|
20
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748 break; |
|
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|
749 case 37: |
| 37 | 750 read_map_scroll_b(0, line, context); |
|
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751 break; |
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|
752 case 38: |
| 37 | 753 render_sprite_cells(context); |
| 754 scan_sprite_table(line, context); | |
|
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changeset
|
755 break; |
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|
756 case 39: |
| 37 | 757 render_map_3(context); |
| 758 scan_sprite_table(line, context);//Just a guess | |
|
20
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|
759 break; |
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|
760 case 40: |
| 37 | 761 render_map_output(line, 0, context); |
| 762 scan_sprite_table(line, context);//Just a guess | |
| 763 //reverse context slot counter so it counts the number of sprite slots | |
| 764 //filled rather than the number of available slots | |
| 765 //context->slot_counter = MAX_SPRITES_LINE - context->slot_counter; | |
| 766 context->cur_slot = MAX_SPRITES_LINE_H32-1; | |
| 767 context->sprite_draws = MAX_DRAWS_H32; | |
| 768 context->flags &= (~FLAG_CAN_MASK & ~FLAG_MASKED); | |
|
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769 break; |
| 37 | 770 COLUMN_RENDER_BLOCK(2, 41) |
| 771 COLUMN_RENDER_BLOCK(4, 49) | |
| 772 COLUMN_RENDER_BLOCK(6, 57) | |
| 773 COLUMN_RENDER_BLOCK_REFRESH(8, 65) | |
| 774 COLUMN_RENDER_BLOCK(10, 73) | |
| 775 COLUMN_RENDER_BLOCK(12, 81) | |
| 776 COLUMN_RENDER_BLOCK(14, 89) | |
| 777 COLUMN_RENDER_BLOCK_REFRESH(16, 97) | |
| 778 COLUMN_RENDER_BLOCK(18, 105) | |
| 779 COLUMN_RENDER_BLOCK(20, 113) | |
| 780 COLUMN_RENDER_BLOCK(22, 121) | |
| 781 COLUMN_RENDER_BLOCK_REFRESH(24, 129) | |
| 782 COLUMN_RENDER_BLOCK(26, 137) | |
| 783 COLUMN_RENDER_BLOCK(28, 145) | |
| 784 COLUMN_RENDER_BLOCK(30, 153) | |
| 785 COLUMN_RENDER_BLOCK_REFRESH(32, 161) | |
|
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786 case 169: |
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787 case 170: |
| 37 | 788 external_slot(context); |
|
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|
789 break; |
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diff
changeset
|
790 } |
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Mostly broken VDP core and savestate viewer
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|
791 } |
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792 void latch_mode(vdp_context * context) |
|
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793 { |
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diff
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|
794 context->latched_mode = (context->regs[REG_MODE_4] & 0x81) | (context->regs[REG_MODE_2] & BIT_PAL); |
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|
795 } |
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|
796 |
|
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797 #define DISPLAY_ENABLE 0x40 |
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798 |
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43
diff
changeset
|
799 int is_refresh(vdp_context * context) |
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800 { |
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diff
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|
801 uint32_t linecyc = context->cycles % MCLKS_LINE; |
|
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|
802 if (context->latched_mode & BIT_H40) { |
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|
803 linecyc = linecyc/16; |
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804 return (linecyc == 73 || linecyc == 105 || linecyc == 137 || linecyc == 169 || linecyc == 201); |
|
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|
805 } else { |
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diff
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|
806 linecyc = linecyc/20; |
|
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|
807 return (linecyc == 66 || linecyc == 98 || linecyc == 130 || linecyc == 162); |
|
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diff
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|
808 } |
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diff
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809 } |
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|
810 |
|
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|
811 void check_render_bg(vdp_context * context, int32_t line) |
|
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diff
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|
812 { |
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|
813 if (line > 0) { |
|
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|
814 line -= 1; |
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|
815 uint16_t * start = NULL, *end = NULL; |
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816 uint32_t linecyc = (context->cycles % MCLKS_LINE); |
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|
817 if (context->latched_mode & BIT_H40) { |
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diff
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818 linecyc /= 16; |
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819 if (linecyc >= 55 && linecyc <= 207 && !((linecyc-55) % 8)) { |
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820 uint32_t x = ((linecyc-55)&(~0xF))*2; |
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|
821 start = context->framebuf + line * 320 + x; |
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822 end = start + 16; |
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|
823 } |
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824 } else { |
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|
825 linecyc /= 20; |
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826 if (linecyc >= 48 && linecyc <= 168 && !((linecyc-48) % 8)) { |
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diff
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|
827 uint32_t x = ((linecyc-48)&(~0xF))*2; |
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|
828 start = context->framebuf + line * 256 + x; |
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diff
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|
829 end = start + 16; |
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|
830 } |
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diff
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|
831 } |
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|
832 while (start != end) { |
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changeset
|
833 *start = context->regs[REG_BG_COLOR] & 0x3F; |
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diff
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|
834 ++start; |
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|
835 } |
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|
836 } |
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|
837 } |
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|
838 |
|
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|
839 void vdp_run_context(vdp_context * context, uint32_t target_cycles) |
|
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840 { |
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|
841 while(context->cycles < target_cycles) |
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842 { |
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|
843 uint32_t line = context->cycles / MCLKS_LINE; |
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844 uint32_t active_lines = context->latched_mode & BIT_PAL ? PAL_ACTIVE : NTSC_ACTIVE; |
|
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|
845 if (!line) { |
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|
846 latch_mode(context); |
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|
847 } |
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|
848 if (line < active_lines && context->regs[REG_MODE_2] & DISPLAY_ENABLE) { |
|
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849 //first sort-of active line is treated as 255 internally |
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850 //it's used for gathering sprite info for line |
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851 line = (line - 1) & 0xFF; |
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852 uint32_t linecyc = context->cycles % MCLKS_LINE; |
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|
853 |
|
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|
854 //Convert to slot number |
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|
855 if (context->latched_mode & BIT_H40){ |
|
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|
856 //TODO: Deal with nasty clock switching during HBLANK |
|
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|
857 linecyc = linecyc/16; |
|
54
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|
858 vdp_h40(line, linecyc, context); |
|
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859 context->cycles += 16; |
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|
860 } else { |
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|
861 linecyc = linecyc/20; |
|
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|
862 vdp_h32(line, linecyc, context); |
|
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|
863 context->cycles += 20; |
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|
864 } |
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865 } else { |
|
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|
866 if (!is_refresh(context)) { |
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|
867 external_slot(context); |
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|
868 } |
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|
869 if (line < active_lines) { |
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|
870 check_render_bg(context, line); |
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|
871 } |
|
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|
872 if (context->latched_mode & BIT_H40){ |
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|
873 //TODO: Deal with nasty clock switching during HBLANK |
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|
874 context->cycles += 16; |
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|
875 } else { |
|
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|
876 context->cycles += 20; |
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changeset
|
877 } |
|
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diff
changeset
|
878 } |
|
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changeset
|
879 } |
|
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changeset
|
880 } |
|
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diff
changeset
|
881 |
|
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|
882 uint32_t vdp_run_to_vblank(vdp_context * context) |
|
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|
883 { |
|
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|
884 uint32_t target_cycles = ((context->latched_mode & BIT_PAL) ? PAL_ACTIVE : NTSC_ACTIVE) * MCLKS_LINE; |
|
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|
885 vdp_run_context(context, target_cycles); |
|
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|
886 return context->cycles; |
|
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|
887 } |
|
f664eeb55cb4
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|
888 |
|
54
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|
889 void vdp_control_port_write(vdp_context * context, uint16_t value) |
|
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43
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|
890 { |
|
58
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56
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|
891 //printf("control port write: %X\n", value); |
|
54
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|
892 if (context->flags & FLAG_PENDING) { |
|
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|
893 context->address = (context->address & 0x3FFF) | (value << 14); |
|
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diff
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|
894 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); |
|
63
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diff
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|
895 if (context->cd & 0x30) { |
|
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58
diff
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|
896 puts("attempt to use DMA detected!"); |
|
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diff
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|
897 } |
|
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|
898 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); |
|
54
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43
diff
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|
899 context->flags &= ~FLAG_PENDING; |
|
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diff
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|
900 } else { |
|
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|
901 if ((value & 0xC000) == 0x8000) { |
|
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diff
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|
902 //Register write |
|
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diff
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|
903 uint8_t reg = (value >> 8) & 0x1F; |
|
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diff
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|
904 if (reg < VDP_REGS) { |
|
63
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Add FPS counter to console output
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diff
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|
905 //printf("register %d set to %X\n", reg, value & 0xFF); |
|
54
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43
diff
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|
906 context->regs[reg] = value; |
|
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58
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|
907 /*if (reg == REG_MODE_2) { |
|
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Add FPS counter to console output
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|
908 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); |
|
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diff
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|
909 }*/ |
|
54
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43
diff
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|
910 } |
|
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diff
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|
911 } else { |
|
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|
912 context->flags |= FLAG_PENDING; |
|
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Get Flavio's color bar demo kind of sort of working
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diff
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|
913 context->address = (context->address &0xC000) | (value & 0x3FFF); |
|
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Get Flavio's color bar demo kind of sort of working
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43
diff
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|
914 context->cd = (context->cd &0x3C) | (value >> 14); |
|
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Get Flavio's color bar demo kind of sort of working
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diff
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|
915 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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diff
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|
916 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
917 } |
|
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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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43
diff
changeset
|
919 void vdp_data_port_write(vdp_context * context, uint16_t value) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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diff
changeset
|
920 { |
|
58
a6a19c45d358
Properly zero-init all VDP buffers. Comment out some debug printfs.
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56
diff
changeset
|
921 //printf("data port write: %X\n", value); |
|
54
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
922 context->flags &= ~FLAG_PENDING; |
|
65
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63
diff
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|
923 if (context->fifo_cur == context->fifo_end) { |
|
54
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
924 printf("FIFO full, waiting for space before next write at cycle %X\n", context->cycles); |
|
65
aef6302770c2
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63
diff
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|
925 } |
|
54
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
926 while (context->fifo_cur == context->fifo_end) { |
|
3b79cbcf6846
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43
diff
changeset
|
927 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
928 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
929 context->fifo_cur->cycle = context->cycles; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
930 context->fifo_cur->value = value; |
|
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43
diff
changeset
|
931 context->fifo_cur->partial = 0; |
|
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Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
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43
diff
changeset
|
932 context->fifo_cur++; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
933 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
934 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
935 uint16_t vdp_control_port_read(vdp_context * context) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
936 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
937 context->flags &= ~FLAG_PENDING; |
|
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43
diff
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|
938 uint16_t value = 0x3400; |
|
3b79cbcf6846
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43
diff
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|
939 if (context->fifo_cur == (context->fifo_end - FIFO_SIZE)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
940 value |= 0x200; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
941 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
942 if (context->fifo_cur == context->fifo_end) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
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|
943 value |= 0x100; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
944 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
945 //TODO: Lots of other bits in status port |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
946 return value; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
947 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
948 |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
949 uint16_t vdp_data_port_read(vdp_context * context) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
950 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
951 context->flags &= ~FLAG_PENDING; |
|
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Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
952 if (!(context->cd & 1)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
953 return 0; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
954 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
955 //Not sure if the FIFO should be drained before processing a read or not, but it would make sense |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
956 context->flags &= ~FLAG_UNUSED_SLOT; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
957 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
958 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
959 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
960 uint16_t value = 0; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
961 switch (context->cd & 0x7) |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
962 { |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
963 case VRAM_READ: |
|
3b79cbcf6846
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43
diff
changeset
|
964 value = context->vdpmem[context->address] << 8; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
965 context->flags &= ~FLAG_UNUSED_SLOT; |
|
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43
diff
changeset
|
966 while (!(context->flags & FLAG_UNUSED_SLOT)) { |
|
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43
diff
changeset
|
967 vdp_run_context(context, context->cycles + ((context->latched_mode & BIT_H40) ? 16 : 20)); |
|
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43
diff
changeset
|
968 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
969 value |= context->vdpmem[context->address ^ 1]; |
|
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43
diff
changeset
|
970 break; |
|
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43
diff
changeset
|
971 case CRAM_READ: |
|
3b79cbcf6846
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43
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changeset
|
972 value = context->cram[(context->address/2) & (CRAM_SIZE-1)]; |
|
3b79cbcf6846
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43
diff
changeset
|
973 break; |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
974 case VSRAM_READ: |
|
3b79cbcf6846
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43
diff
changeset
|
975 if (((context->address / 2) & 63) < VSRAM_SIZE) { |
|
3b79cbcf6846
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43
diff
changeset
|
976 value = context->vsram[context->address & 63]; |
|
3b79cbcf6846
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43
diff
changeset
|
977 } |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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43
diff
changeset
|
978 break; |
|
3b79cbcf6846
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43
diff
changeset
|
979 } |
|
3b79cbcf6846
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43
diff
changeset
|
980 context->address += context->regs[REG_AUTOINC]; |
|
3b79cbcf6846
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43
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changeset
|
981 return value; |
|
3b79cbcf6846
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43
diff
changeset
|
982 } |
|
3b79cbcf6846
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43
diff
changeset
|
983 |
|
65
aef6302770c2
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63
diff
changeset
|
984 void vdp_adjust_cycles(vdp_context * context, uint32_t deduction) |
|
aef6302770c2
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63
diff
changeset
|
985 { |
|
aef6302770c2
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63
diff
changeset
|
986 context->cycles -= deduction; |
|
aef6302770c2
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63
diff
changeset
|
987 for(fifo_entry * start = (context->fifo_end - FIFO_SIZE); start < context->fifo_cur; start++) { |
|
aef6302770c2
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63
diff
changeset
|
988 if (start->cycle >= deduction) { |
|
aef6302770c2
Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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63
diff
changeset
|
989 start->cycle -= deduction; |
|
aef6302770c2
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990 } else { |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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991 start->cycle = 0; |
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992 } |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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993 } |
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994 } |
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Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
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995 |
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20
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996 #define GST_VDP_REGS 0xFA |
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997 #define GST_VDP_MEM 0x12478 |
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998 |
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999 void vdp_load_savestate(vdp_context * context, FILE * state_file) |
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1000 { |
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1001 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1002 fseek(state_file, GST_VDP_REGS, SEEK_SET); |
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1003 fread(context->regs, 1, VDP_REGS, state_file); |
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1004 latch_mode(context); |
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1005 fread(tmp_buf, 1, sizeof(tmp_buf), state_file); |
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1006 for (int i = 0; i < CRAM_SIZE; i++) { |
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1007 context->cram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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1008 } |
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1009 fread(tmp_buf, 2, VSRAM_SIZE, state_file); |
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1010 for (int i = 0; i < VSRAM_SIZE; i++) { |
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23
3e924bb56560
Fix endianness of VSRAM when read from Genecyst save state
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1011 context->vsram[i] = (tmp_buf[i*2+1] << 8) | tmp_buf[i*2]; |
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1012 } |
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1013 fseek(state_file, GST_VDP_MEM, SEEK_SET); |
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1014 fread(context->vdpmem, 1, VRAM_SIZE, state_file); |
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1015 } |
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54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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1016 |
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56
a28b1dfe1af2
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1017 void vdp_save_state(vdp_context * context, FILE * outfile) |
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1018 { |
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1019 uint8_t tmp_buf[CRAM_SIZE*2]; |
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1020 fseek(outfile, GST_VDP_REGS, SEEK_SET); |
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1021 fwrite(context->regs, 1, VDP_REGS, outfile); |
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1022 for (int i = 0; i < CRAM_SIZE; i++) { |
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1023 tmp_buf[i*2] = context->cram[i]; |
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1024 tmp_buf[i*2+1] = context->cram[i] >> 8; |
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1025 } |
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1026 fwrite(tmp_buf, 1, sizeof(tmp_buf), outfile); |
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1027 for (int i = 0; i < VSRAM_SIZE; i++) { |
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1028 tmp_buf[i*2] = context->vsram[i]; |
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1029 tmp_buf[i*2+1] = context->vsram[i] >> 8; |
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1030 } |
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1031 fwrite(tmp_buf, 2, VSRAM_SIZE, outfile); |
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1032 fseek(outfile, GST_VDP_MEM, SEEK_SET); |
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1033 fwrite(context->vdpmem, 1, VRAM_SIZE, outfile); |
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1034 } |
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1035 |