X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=plugins%2Fdfsound%2Fdma.c;h=25a0aefd5fb8f8e587dc5359b882dfcd28b64482;hb=25f460eca64d55f980ab57851ffbd9fe58a5793c;hp=eb85a7316d31b8eb55c0e3b272aa4e32c263a5f3;hpb=4d66d894c6563cbfb78fe8ccc0b374809fc44b0d;p=pcsx_rearmed.git

diff --git a/plugins/dfsound/dma.c b/plugins/dfsound/dma.c
index eb85a731..25a0aefd 100644
--- a/plugins/dfsound/dma.c
+++ b/plugins/dfsound/dma.c
@@ -22,18 +22,13 @@
 #include "externals.h"
 #include "registers.h"
 
-////////////////////////////////////////////////////////////////////////
-// READ DMA (one value)
-////////////////////////////////////////////////////////////////////////
-
-unsigned short CALLBACK SPUreadDMA(void)
+static void set_dma_end(int iSize, unsigned int cycles)
 {
- unsigned short s = *(unsigned short *)(spu.spuMemC + spu.spuAddr);
- check_irq_io(spu.spuAddr);
- spu.spuAddr += 2;
- spu.spuAddr &= 0x7fffe;
-
- return s;
+ // this must be > psxdma.c dma irq
+ // Road Rash also wants a considerable delay, maybe because of fifo?
+ cycles += iSize * 20;  // maybe
+ cycles |= 1;           // indicates dma is active
+ spu.cycles_dma_end = cycles;
 }
 
 ////////////////////////////////////////////////////////////////////////
@@ -44,10 +39,10 @@ void CALLBACK SPUreadDMAMem(unsigned short *pusPSXMem, int iSize,
  unsigned int cycles)
 {
  unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;
- int i, irq;
+ int i, irq_after;
 
- do_samples_if_needed(cycles, 1);
- irq = addr <= irq_addr && irq_addr < addr + iSize*2;
+ do_samples_if_needed(cycles, 1, 2);
+ irq_after = (irq_addr - addr) & 0x7ffff;
 
  for(i = 0; i < iSize; i++)
  {
@@ -55,27 +50,12 @@ void CALLBACK SPUreadDMAMem(unsigned short *pusPSXMem, int iSize,
   addr += 2;
   addr &= 0x7fffe;
  }
- if (irq && (spu.spuCtrl & CTRL_IRQ))
+ if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {
   log_unhandled("rdma spu irq: %x/%x+%x\n", irq_addr, spu.spuAddr, iSize * 2);
+  do_irq_io(irq_after);
+ }
  spu.spuAddr = addr;
-}
-
-////////////////////////////////////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////
-// WRITE DMA (one value)
-////////////////////////////////////////////////////////////////////////
-  
-void CALLBACK SPUwriteDMA(unsigned short val)
-{
- *(unsigned short *)(spu.spuMemC + spu.spuAddr) = val;
-
- check_irq_io(spu.spuAddr);
- spu.spuAddr += 2;
- spu.spuAddr &= 0x7fffe;
- spu.bMemDirty = 1;
+ set_dma_end(iSize, cycles);
 }
 
 ////////////////////////////////////////////////////////////////////////
@@ -86,11 +66,11 @@ void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
  unsigned int cycles)
 {
  unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;
- int i, irq;
+ int i, irq_after;
  
- do_samples_if_needed(cycles, 1);
+ do_samples_if_needed(cycles, 1, 2);
+ irq_after = (irq_addr - addr) & 0x7ffff;
  spu.bMemDirty = 1;
- irq = addr <= irq_addr && irq_addr < addr + iSize*2;
 
  if (addr + iSize*2 < 0x80000)
  {
@@ -99,7 +79,6 @@ void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
  }
  else
  {
-  irq |= irq_addr < ((addr + iSize*2) & 0x7ffff);
   for (i = 0; i < iSize; i++)
   {
    *(unsigned short *)(spu.spuMemC + addr) = *pusPSXMem++;
@@ -107,9 +86,16 @@ void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
    addr &= 0x7fffe;
   }
  }
- if (irq && (spu.spuCtrl & CTRL_IRQ)) // unhandled because need to implement delay
-  log_unhandled("wdma spu irq: %x/%x+%x\n", irq_addr, spu.spuAddr, iSize * 2);
+ if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {
+  log_unhandled("wdma spu irq: %x/%x+%x (%u)\n",
+    irq_addr, spu.spuAddr, iSize * 2, irq_after);
+  // this should be consistent with psxdma.c timing
+  // might also need more delay like in set_dma_end()
+  do_irq_io(irq_after);
+ }
  spu.spuAddr = addr;
+ set_dma_end(iSize, cycles);
 }
 
 ////////////////////////////////////////////////////////////////////////
+// vim:shiftwidth=1:expandtab