piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2025-07-24 22:59:58 -06:00
Code Issues Packages Projects Releases Wiki Activity

* GXFIFO DMA (note: Mario Slam Basketball keeps overflowing the FIFO for whatever reason, probably lack of proper DMA timings)

Browse Source 
* start implementing matrix shit
This commit is contained in:
StapleButter
2017-02-08 21:30:10 +01:00
parent 796dc58f71
commit 49fd4ccb45
6 changed files with 436 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
DMA.cpp
View File

@ -20,6 +20,7 @@
#include "NDS.h"
#include "DMA.h"
#include "NDSCart.h"
#include "GPU3D.h"
// NOTES ON DMA SHIT
@ -87,9 +88,11 @@ void DMA::WriteCnt(u32 val)
if ((StartMode & 0x7) == 0)
Start();
else if (StartMode == 0x07)
GPU3D::CheckFIFODMA();
//else
// printf("SPECIAL ARM%d DMA%d START MODE %02X\n", CPU?7:9, Num, StartMode);
if ((StartMode&7)!=0x00 && (StartMode&7)!=0x1 && StartMode!=2 && StartMode!=0x05 && StartMode!=0x12)
if ((StartMode&7)!=0x00 && (StartMode&7)!=0x1 && StartMode!=2 && StartMode!=0x05 && StartMode!=0x12 && StartMode!=0x07)
printf("UNIMPLEMENTED ARM%d DMA%d START MODE %02X\n", CPU?7:9, Num, StartMode);
//if (StartMode==2)printf("HBLANK DMA %08X -> %08X\n", SrcAddr, DstAddr);
}
@ -123,6 +126,10 @@ void DMA::Start()
NDS::TriggerIRQ(CPU, NDS::IRQ_DMA0 + Num);
return;
}
if (StartMode == 0x07)printf("GXFIFO DMA %08X %08X\n", Cnt, CurSrcAddr);
u32 num = RemCount;
if (StartMode == 0x07 && num > 112)
num = 112;
// TODO: NOT MAKE THE DMA INSTANT!!
if (!(Cnt & 0x04000000))
@ -130,12 +137,13 @@ void DMA::Start()
u16 (*readfn)(u32) = CPU ? NDS::ARM7Read16 : NDS::ARM9Read16;
void (*writefn)(u32,u16) = CPU ? NDS::ARM7Write16 : NDS::ARM9Write16;
while (RemCount > 0)
while (num > 0)
{
writefn(CurDstAddr, readfn(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<1;
CurDstAddr += DstAddrInc<<1;
num--;
RemCount--;
}
}
@ -144,16 +152,24 @@ void DMA::Start()
u32 (*readfn)(u32) = CPU ? NDS::ARM7Read32 : NDS::ARM9Read32;
void (*writefn)(u32,u32) = CPU ? NDS::ARM7Write32 : NDS::ARM9Write32;
while (RemCount > 0)
while (num > 0)
{
writefn(CurDstAddr, readfn(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<2;
CurDstAddr += DstAddrInc<<2;
num--;
RemCount--;
}
}
if (RemCount)
{
Cnt &= ~countmask;
Cnt |= RemCount;
return;
}
if (!(Cnt & 0x02000000))
Cnt &= ~0x80000000;