Mercurial > repos > blastem
changeset 84:2d1ae596db7a
Fix long reads from IO ports or long reads that trigger sync cycles by saving rdi. Possibly fix word wide IO reads.
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 26 Dec 2012 17:34:59 -0800 |
| parents | 2c7267617d71 |
| children | 1db2a0b655d1 |
| files | runtime.S vdp.c |
| diffstat | 2 files changed, 5 insertions(+), 3 deletions(-) [+] |
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--- a/runtime.S Wed Dec 26 17:06:34 2012 -0800 +++ b/runtime.S Wed Dec 26 17:34:59 2012 -0800 @@ -154,7 +154,7 @@ call io_read_w mov %rax, %rsi call m68k_load_context - mov 136(%rsi), %cl + mov 136(%rsi), %cx ret bad_access_msg: @@ -333,7 +333,9 @@ mov %cx, %di pop %rcx add $2, %ecx + push %rdi call m68k_read_word_scratch1 + pop %rdi and $0xFFFF, %ecx shl $16, %edi or %edi, %ecx
--- a/vdp.c Wed Dec 26 17:06:34 2012 -0800 +++ b/vdp.c Wed Dec 26 17:34:59 2012 -0800 @@ -313,7 +313,7 @@ } break; case CRAM_WRITE: - //printf("CRAM Write: %X to %X\n", start->value, context->address); + printf("CRAM Write: %X to %X, autoinc: %d\n", start->value, context->address, context->regs[REG_AUTOINC]); context->cram[(context->address/2) & (CRAM_SIZE-1)] = start->value; break; case VSRAM_WRITE: @@ -1029,7 +1029,7 @@ context->address = (context->address & 0x3FFF) | (value << 14); context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); context->flags &= ~FLAG_PENDING; - //printf("New Address: %X, New CD: %X\n", context->address, context->cd); + printf("New Address: %X, New CD: %X\n", context->address, context->cd); if (context->cd & 0x20) { if((context->regs[REG_DMASRC_H] & 0xC0) != 0x80) { //DMA copy or 68K -> VDP, transfer starts immediately