diff options
| -rw-r--r-- | vdp.c | 5 |
1 files changed, 4 insertions, 1 deletions
@@ -2432,9 +2432,12 @@ void vdp_run_dma_done(vdp_context * context, uint32_t target_cycles) dmalen = 0x10000; } uint32_t min_dma_complete = dmalen * (context->regs[REG_MODE_4] & BIT_H40 ? 16 : 20); - if ((context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 || (context->cd & 0xF) == VRAM_WRITE) { + if ( + (context->regs[REG_DMASRC_H] & 0xC0) == 0xC0 + || (((context->cd & 0xF) == VRAM_WRITE) && !(context->regs[REG_MODE_2] & BIT_128K_VRAM))) { //DMA copies take twice as long to complete since they require a read and a write //DMA Fills and transfers to VRAM also take twice as long as it requires 2 writes for a single word + //unless 128KB mode is enabled min_dma_complete *= 2; } min_dma_complete += context->cycles; |