diff options
Diffstat (limited to 'DMA.cpp')
| -rw-r--r-- | DMA.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
@@ -19,6 +19,7 @@ #include <stdio.h> #include "NDS.h" #include "DMA.h" +#include "NDSCart.h" // NOTES ON DMA SHIT @@ -82,7 +83,7 @@ void DMA::WriteCnt(u32 val) if (CPU == 0) StartMode = (Cnt >> 27) & 0x7; else - StartMode = ((Cnt >> 28) & 0x3) | 0x8; + StartMode = ((Cnt >> 28) & 0x3) | 0x10; if ((StartMode & 0x7) == 0) Start(); @@ -106,6 +107,19 @@ void DMA::Start() if ((Cnt & 0x00060000) == 0x00060000) CurDstAddr = DstAddr; + // special path for cart DMA. this is a gross hack. + // emulating it properly requires emulating cart transfer delays, so uh... TODO + if (CurSrcAddr==0x04100010 && RemCount==1 && (Cnt & 0x07E00000)==0x07000000 && + ((CPU==0 && StartMode==0x06) || (CPU==1 && StartMode==0x12))) + { + printf("CART DMA %08X\n", CurDstAddr); + NDSCart::DMA(CurDstAddr); + Cnt &= ~0x80000000; + if (Cnt & 0x40000000) + NDS::TriggerIRQ(CPU, NDS::IRQ_DMA0 + Num); + return; + } + //printf("ARM%d DMA%d %08X %08X->%08X %d bytes %dbit\n", CPU?7:9, Num, Cnt, CurSrcAddr, CurDstAddr, RemCount*((Cnt&0x04000000)?4:2), (Cnt&0x04000000)?32:16); // TODO: NOT MAKE THE DMA INSTANT!! |