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comparison vdp.c @ 151:6b593ea0ed90

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Implement MULU/MULS and DIVU/DIVS
author Mike Pavone <pavone@retrodev.com>
date Thu, 03 Jan 2013 22:07:40 -0800
parents 139e5dcd6aa3
children 8b846bcff6a2
comparison
equal deleted inserted replaced
150:3e68e517cc01 151:6b593ea0ed90
203 context->flags |= FLAG_DMA_PROG; 203 context->flags |= FLAG_DMA_PROG;
204 } 204 }
205 break; 205 break;
206 case CRAM_WRITE: 206 case CRAM_WRITE:
207 context->cram[(context->address/2) & (CRAM_SIZE-1)] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); 207 context->cram[(context->address/2) & (CRAM_SIZE-1)] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]);
208 //printf("CRAM DMA | %X set to %X from %X at %d\n", (context->address/2) & (CRAM_SIZE-1), context->cram[(context->address/2) & (CRAM_SIZE-1)], (context->regs[REG_DMASRC_H] << 17) | (context->regs[REG_DMASRC_M] << 9) | (context->regs[REG_DMASRC_L] << 1), context->cycles);
208 break; 209 break;
209 case VSRAM_WRITE: 210 case VSRAM_WRITE:
210 if (((context->address/2) & 63) < VSRAM_SIZE) { 211 if (((context->address/2) & 63) < VSRAM_SIZE) {
211 context->vsram[(context->address/2) & 63] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]); 212 context->vsram[(context->address/2) & 63] = read_dma_value((context->regs[REG_DMASRC_H] << 16) | (context->regs[REG_DMASRC_M] << 8) | context->regs[REG_DMASRC_L]);
212 } 213 }
308 //skip auto-increment and removal of entry from fifo 309 //skip auto-increment and removal of entry from fifo
309 return; 310 return;
310 } 311 }
311 break; 312 break;
312 case CRAM_WRITE: 313 case CRAM_WRITE:
313 //printf("CRAM Write: %X to %X\n", start->value, context->address); 314 //printf("CRAM Write | %X to %X\n", start->value, (start->address/2) & (CRAM_SIZE-1));
314 context->cram[(start->address/2) & (CRAM_SIZE-1)] = start->value; 315 context->cram[(start->address/2) & (CRAM_SIZE-1)] = start->value;
315 break; 316 break;
316 case VSRAM_WRITE: 317 case VSRAM_WRITE:
317 if (((start->address/2) & 63) < VSRAM_SIZE) { 318 if (((start->address/2) & 63) < VSRAM_SIZE) {
318 //printf("VSRAM Write: %X to %X\n", start->value, context->address); 319 //printf("VSRAM Write: %X to %X\n", start->value, context->address);
1045 //Register write 1046 //Register write
1046 uint8_t reg = (value >> 8) & 0x1F; 1047 uint8_t reg = (value >> 8) & 0x1F;
1047 if (reg < VDP_REGS) { 1048 if (reg < VDP_REGS) {
1048 //printf("register %d set to %X\n", reg, value & 0xFF); 1049 //printf("register %d set to %X\n", reg, value & 0xFF);
1049 context->regs[reg] = value; 1050 context->regs[reg] = value;
1050 /*if (reg == REG_MODE_2) { 1051 if (reg == REG_MODE_2) {
1051 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); 1052 //printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled");
1052 }*/ 1053 }
1053 } 1054 }
1054 } else { 1055 } else {
1055 context->flags |= FLAG_PENDING; 1056 context->flags |= FLAG_PENDING;
1056 context->address = (context->address &0xC000) | (value & 0x3FFF); 1057 context->address = (context->address &0xC000) | (value & 0x3FFF);
1057 context->cd = (context->cd &0x3C) | (value >> 14); 1058 context->cd = (context->cd &0x3C) | (value >> 14);