Mercurial > repos > blastem
changeset 142:b42bcfa09cce
Fix DMA fills to VRAM
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 31 Dec 2012 18:22:25 -0800 |
| parents | 576f55711d8d |
| children | e5487ef04619 |
| files | vdp.c |
| diffstat | 1 files changed, 2 insertions(+), 9 deletions(-) [+] |
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--- a/vdp.c Mon Dec 31 18:12:08 2012 -0800 +++ b/vdp.c Mon Dec 31 18:22:25 2012 -0800 @@ -219,15 +219,8 @@ { case VRAM_WRITE: //Charles MacDonald's VDP doc says that the low byte gets written first - //this doesn't make a lot of sense to me, but until I've had a change to - //verify it myself, I'll assume it's true - if (context->flags & FLAG_DMA_PROG) { - context->vdpmem[context->address ^ 1] = context->dma_val >> 8; - context->flags &= ~FLAG_DMA_PROG; - } else { - context->vdpmem[context->address] = context->dma_val; - context->flags |= FLAG_DMA_PROG; - } + context->vdpmem[context->address] = context->dma_val; + context->dma_val = (context->dma_val << 8) | ((context->dma_val >> 8) & 0xFF); break; case CRAM_WRITE: context->cram[(context->address/2) & (CRAM_SIZE-1)] = context->dma_val;