diff options
Diffstat (limited to 'src/DMA.cpp')
| -rw-r--r-- | src/DMA.cpp | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/src/DMA.cpp b/src/DMA.cpp index edd6f8b..39dcb85 100644 --- a/src/DMA.cpp +++ b/src/DMA.cpp @@ -186,20 +186,6 @@ void DMA::Start() //printf("ARM%d DMA%d %08X %02X %08X->%08X %d bytes %dbit\n", CPU?7:9, Num, Cnt, StartMode, CurSrcAddr, CurDstAddr, RemCount*((Cnt&0x04000000)?4:2), (Cnt&0x04000000)?32:16); - // special path for the display FIFO. another gross hack. - // the display FIFO seems to be more like a circular buffer that holds 16 pixels - // from which the display controller reads. DMA is triggered every 8 pixels to fill it - // as it is being read from. emulating it properly would be resource intensive. - // proper emulation would only matter if something is trying to feed the FIFO manually - // instead of using the DMA. which is probably never happening. the only thing I know of - // that even uses the display FIFO is the aging cart. - if (StartMode == 0x04) - { - GPU::GPU2D_A->FIFODMA(CurSrcAddr); - CurSrcAddr += 256*2; - return; - } - IsGXFIFODMA = (CPU == 0 && (CurSrcAddr>>24) == 0x02 && CurDstAddr == 0x04000400 && DstAddrInc == 0); // TODO eventually: not stop if we're running code in ITCM |