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Added some basic VDP debugging features to debugger. Fixed DMA enable bug
author Mike Pavone <pavone@retrodev.com>
date Mon, 13 May 2013 21:06:08 -0700
parents 8c01b4154480
children bf7ed23efa40
comparison
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326:d3ff30f32359 327:1b00258b1f29
8 #define BUF_BIT_PRIORITY 0x40 8 #define BUF_BIT_PRIORITY 0x40
9 #define MAP_BIT_PRIORITY 0x8000 9 #define MAP_BIT_PRIORITY 0x8000
10 #define MAP_BIT_H_FLIP 0x800 10 #define MAP_BIT_H_FLIP 0x800
11 #define MAP_BIT_V_FLIP 0x1000 11 #define MAP_BIT_V_FLIP 0x1000
12 12
13 #define BIT_PAL 0x8 13 //Mode reg 1
14 #define BIT_DMA_ENABLE 0x4 14 #define BIT_HINT_EN 0x10
15 #define BIT_H40 0x1 15 #define BIT_PAL_SEL 0x04
16 16 #define BIT_HVC_LATCH 0x02
17 #define BIT_DISP_DIS 0x01
18
19 //Mode reg 2
20 #define BIT_DISP_EN 0x40
21 #define BIT_VINT_EN 0x20
22 #define BIT_DMA_ENABLE 0x10
23 #define BIT_PAL 0x08
24 #define BIT_MODE_5 0x04
25
26 //Mode reg 3
27 #define BIT_EINT_EN 0x10
28 #define BIT_VSCROLL 0x04
29
30 //Mode reg 4
31 #define BIT_H40 0x01
17 #define BIT_HILIGHT 0x8 32 #define BIT_HILIGHT 0x8
18 33
19 #define SCROLL_BUFFER_SIZE 32 34 #define SCROLL_BUFFER_SIZE 32
20 #define SCROLL_BUFFER_DRAW 16 35 #define SCROLL_BUFFER_DRAW 16
21 36
83 uint16_t pattern = ((context->vdpmem[address + 4] << 8 | context->vdpmem[address + 5]) & 0x7FF) << 5; 98 uint16_t pattern = ((context->vdpmem[address + 4] << 8 | context->vdpmem[address + 5]) & 0x7FF) << 5;
84 //printf("Sprite %d: X=%d(%d), Y=%d(%d), Width=%u, Height=%u, Link=%u, Pal=%u, Pri=%u, Pat=%X\n", current_index, x, x-128, y, y-128, width, height, link, pal, pri, pattern); 99 //printf("Sprite %d: X=%d(%d), Y=%d(%d), Width=%u, Height=%u, Link=%u, Pal=%u, Pri=%u, Pat=%X\n", current_index, x, x-128, y, y-128, width, height, link, pal, pri, pattern);
85 current_index = link; 100 current_index = link;
86 count++; 101 count++;
87 } while (current_index != 0 && count < 80); 102 } while (current_index != 0 && count < 80);
103 }
104
105 void vdp_print_reg_explain(vdp_context * context)
106 {
107 char * hscroll[] = {"full", "7-line", "cell", "line"};
108 printf("**Mode Group**\n"
109 "00: %.2X | H-ints %s, Pal Select %d, HVC latch %s, Display gen %s\n"
110 "01: %.2X | Display %s, V-ints %s, Height: %d, Mode %d\n"
111 "0B: %.2X | E-ints %s, V-Scroll: %s, H-Scroll: %s\n"
112 "0C: %.2X | Width: %d, Shadow/Highlight: %s\n",
113 context->regs[REG_MODE_1], context->regs[REG_MODE_1] & BIT_HINT_EN ? "enabled" : "disabled", context->regs[REG_MODE_1] & BIT_PAL_SEL != 0,
114 context->regs[REG_MODE_1] & BIT_HVC_LATCH ? "enabled" : "disabled", context->regs[REG_MODE_1] & BIT_DISP_DIS ? "disabled" : "enabled",
115 context->regs[REG_MODE_2], context->regs[REG_MODE_2] & BIT_DISP_EN ? "enabled" : "disabled", context->regs[REG_MODE_2] & BIT_VINT_EN ? "enabled" : "disabled",
116 context->regs[REG_MODE_2] & BIT_PAL ? 30 : 28, context->regs[REG_MODE_2] & BIT_MODE_5 ? 5 : 4,
117 context->regs[REG_MODE_3], context->regs[REG_MODE_3] & BIT_EINT_EN ? "enabled" : "disabled", context->regs[REG_MODE_3] & BIT_VSCROLL ? "2 cell" : "full",
118 hscroll[context->regs[REG_MODE_3] & 0x3],
119 context->regs[REG_MODE_4], context->regs[REG_MODE_4] & BIT_H40 ? 40 : 32, context->regs[REG_MODE_4] & BIT_HILIGHT ? "enabled" : "disabled");
120 printf("\n**Table Group**\n"
121 "02: %.2X | Scroll A Name Table: $%.4X\n"
122 "03: %.2X | Window Name Table: $%.4X\n"
123 "04: %.2X | Scroll B Name Table: $%.4X\n"
124 "05: %.2X | Sprite Attribute Table: $%.4X\n"
125 "0D: %.2X | HScroll Data Table: $%.4X\n",
126 context->regs[REG_SCROLL_A], (context->regs[REG_SCROLL_A] & 0x38) << 10,
127 context->regs[REG_WINDOW], (context->regs[REG_WINDOW] & (context->regs[REG_MODE_4] & BIT_H40 ? 0x3C : 0x3E)) << 10,
128 context->regs[REG_SCROLL_B], (context->regs[REG_SCROLL_B] & 0x7) << 13,
129 context->regs[REG_SAT], (context->regs[REG_SAT] & (context->regs[REG_MODE_4] & BIT_H40 ? 0x3E : 0x3F)) << 9,
130 context->regs[REG_HSCROLL], (context->regs[REG_HSCROLL] & 0x1F) << 10);
131 char * sizes[] = {"32", "64", "invalid", "128"};
132 printf("\n**Misc Group**\n"
133 "07: %.2X | Backdrop Color: $%X\n"
134 "0A: %.2X | H-Int Counter: %u\n"
135 "0F: %.2X | Auto-increment: $%X\n"
136 "10: %.2X | Scroll A/B Size: %sx%s\n",
137 context->regs[REG_BG_COLOR], context->regs[REG_BG_COLOR] & 0x3F,
138 context->regs[REG_HINT], context->regs[REG_HINT],
139 context->regs[REG_AUTOINC], context->regs[REG_AUTOINC],
140 context->regs[REG_SCROLL], sizes[context->regs[REG_SCROLL] & 0x3], sizes[context->regs[REG_SCROLL] >> 4 & 0x3]);
141
142 //TODO: Window Group, DMA Group
88 } 143 }
89 144
90 void scan_sprite_table(uint32_t line, vdp_context * context) 145 void scan_sprite_table(uint32_t line, vdp_context * context)
91 { 146 {
92 if (context->sprite_index && context->slot_counter) { 147 if (context->sprite_index && context->slot_counter) {
423 break; 478 break;
424 case 0x30: 479 case 0x30:
425 vscroll = 0x3FF; 480 vscroll = 0x3FF;
426 break; 481 break;
427 } 482 }
428 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & 0x4 ? column : 0) + vsram_off] + line); 483 vscroll &= (context->vsram[(context->regs[REG_MODE_3] & BIT_VSCROLL ? column : 0) + vsram_off] + line);
429 context->v_offset = vscroll & 0x7; 484 context->v_offset = vscroll & 0x7;
430 //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); 485 //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);
431 vscroll /= 8; 486 vscroll /= 8;
432 uint16_t hscroll_mask; 487 uint16_t hscroll_mask;
433 uint16_t v_mul; 488 uint16_t v_mul;
1143 if (context->flags & FLAG_PENDING) { 1198 if (context->flags & FLAG_PENDING) {
1144 context->address = (context->address & 0x3FFF) | (value << 14); 1199 context->address = (context->address & 0x3FFF) | (value << 14);
1145 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); 1200 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C);
1146 context->flags &= ~FLAG_PENDING; 1201 context->flags &= ~FLAG_PENDING;
1147 //printf("New Address: %X, New CD: %X\n", context->address, context->cd); 1202 //printf("New Address: %X, New CD: %X\n", context->address, context->cd);
1148 if (context->cd & 0x20) { 1203 if (context->cd & 0x20 && (context->regs[REG_MODE_2] & BIT_DMA_ENABLE)) {
1204 //
1149 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { 1205 if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) {
1150 //DMA copy or 68K -> VDP, transfer starts immediately 1206 //DMA copy or 68K -> VDP, transfer starts immediately
1151 context->flags |= FLAG_DMA_RUN; 1207 context->flags |= FLAG_DMA_RUN;
1152 context->dma_cd = context->cd; 1208 context->dma_cd = context->cd;
1153 if (!(context->regs[REG_DMASRC_H] & 0x80)) { 1209 if (!(context->regs[REG_DMASRC_H] & 0x80)) {
1210 //printf("DMA Address: %X, New CD: %X, Source: %X, Length: %X\n", context->address, context->cd, (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->regs[REG_DMALEN_H] << 8 | context->regs[REG_DMALEN_L]);
1154 return 1; 1211 return 1;
1212 } else {
1213 //printf("DMA Copy Address: %X, New CD: %X, Source: %X\n", context->address, context->cd, (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]);
1155 } 1214 }
1215 } else {
1216 //printf("DMA Fill Address: %X, New CD: %X\n", context->address, context->cd);
1156 } 1217 }
1157 } 1218 }
1158 } else { 1219 } else {
1159 if ((value & 0xC000) == 0x8000) { 1220 if ((value & 0xC000) == 0x8000) {
1160 //Register write 1221 //Register write
1317 } 1378 }
1318 } 1379 }
1319 1380
1320 uint32_t vdp_next_hint(vdp_context * context) 1381 uint32_t vdp_next_hint(vdp_context * context)
1321 { 1382 {
1322 if (!(context->regs[REG_MODE_1] & 0x10)) { 1383 if (!(context->regs[REG_MODE_1] & BIT_HINT_EN)) {
1323 return 0xFFFFFFFF; 1384 return 0xFFFFFFFF;
1324 } 1385 }
1325 if (context->flags2 & FLAG2_HINT_PENDING) { 1386 if (context->flags2 & FLAG2_HINT_PENDING) {
1326 return context->cycles; 1387 return context->cycles;
1327 } 1388 }
1338 return hcycle; 1399 return hcycle;
1339 } 1400 }
1340 1401
1341 uint32_t vdp_next_vint(vdp_context * context) 1402 uint32_t vdp_next_vint(vdp_context * context)
1342 { 1403 {
1343 if (!(context->regs[REG_MODE_2] & 0x20)) { 1404 if (!(context->regs[REG_MODE_2] & BIT_VINT_EN)) {
1344 return 0xFFFFFFFF; 1405 return 0xFFFFFFFF;
1345 } 1406 }
1346 if (context->flags2 & FLAG2_VINT_PENDING) { 1407 if (context->flags2 & FLAG2_VINT_PENDING) {
1347 return context->cycles; 1408 return context->cycles;
1348 } 1409 }