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Don't do invalid GIFchain calls, fixes Dual Hearts part 2 of Issue 314. 

This is part of PATH 3 masking mess, so it could fix other PATH 3 using games.
Added some debug lines as well, should there be problems.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@2331 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
ramapcsx2 2009-12-09 12:23:24 +00:00
parent 1bb1b71544
commit 514d78392c
1 changed files with 20 additions and 11 deletions
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31
pcsx2/Gif.cpp
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@ -135,7 +135,8 @@ int _GIFchain()
static __forceinline void GIFchain()
{
Registers::Freeze();
if (gif->qwc) gscycles+= _GIFchain(); /* guessing */
// qwc check now done outside this function
/*if (gif->qwc)*/ gscycles+= _GIFchain(); /* guessing */
Registers::Thaw();
}
@ -235,10 +236,14 @@ void GIFdma()
if (gif->qwc == 0) CPU_INT(2, 16);
return;
}
GIFchain();
CPU_INT(2, gscycles * BIAS);
return;
//Check with Path3 masking games
if (gif->qwc > 0) {
GIFchain();
CPU_INT(2, gscycles * BIAS);
return;
}
else DevCon.WriteLn("GIFdma() case 1, but qwc = 0!"); //Don't do 0 GIFchain and then return
}
// Transfer Dn_QWC from Dn_MADR to GIF
@ -249,11 +254,14 @@ void GIFdma()
{
Console.WriteLn("DMA Stall Control on GIF normal");
}
GIFchain(); //Transfers the data set by the switch
CPU_INT(2, gscycles * BIAS);
return;
//Check with Path3 masking games
if (gif->qwc > 0) {
GIFchain(); //Transfers the data set by the switch
CPU_INT(2, gscycles * BIAS);
return;
}
else DevCon.WriteLn("GIFdma() case 2, but qwc = 0!"); //Don't do 0 GIFchain and then return, fixes Dual Hearts
}
if ((gif->chcr.MOD == CHAIN_MODE) && (!gspath3done)) // Chain Mode
@ -267,7 +275,8 @@ void GIFdma()
// there are still bugs, need to also check if gif->madr +16*qwc >= stadr, if not, stall
if (!gspath3done && ((gif->madr + (gif->qwc * 16)) > dmacRegs->stadr.ADDR) && (ptag->ID == TAG_REFS))
{
// stalled
// stalled.
// We really need to test this. Pay attention to prevcycles, as it used to trigger GIFchains in the code above. (rama)
Console.WriteLn("GS Stall Control Source = %x, Drain = %x\n MADR = %x, STADR = %x", (psHu32(0xe000) >> 4) & 0x3, (psHu32(0xe000) >> 6) & 0x3,gif->madr, psHu32(DMAC_STADR));
prevcycles = gscycles;
gif->tadr -= 16;