diff options
| author | Mike Pavone <pavone@retrodev.com> | 2012-12-26 17:34:59 -0800 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2012-12-26 17:34:59 -0800 |
| commit | cce801dfb2df84293b42c2a73ef1e894ac437333 (patch) | |
| tree | fb84cd0b053c11fd0c6717bb55549efc419b1d33 | |
| parent | e47a5743357fe9d026a62cb4c1c01f044215adde (diff) | |
Fix long reads from IO ports or long reads that trigger sync cycles by saving rdi. Possibly fix word wide IO reads.
| -rw-r--r-- | runtime.S | 4 | ||||
| -rw-r--r-- | vdp.c | 4 |
2 files changed, 5 insertions, 3 deletions
@@ -154,7 +154,7 @@ do_io_read_w: 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 @@ m68k_read_long_scratch1: 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 @@ -313,7 +313,7 @@ void external_slot(vdp_context * context) } 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 @@ int vdp_control_port_write(vdp_context * context, uint16_t value) 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 |