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3D: add support for 8bit accesses to GXSTAT (Golden Sun - Dark Dawn)

This commit is contained in:
StapleButter 2017-11-04 15:13:01 +01:00
parent 0a04efc33e
commit 5bea3cc530
1 changed files with 75 additions and 0 deletions
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75
src/GPU3D.cpp
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@ -1940,6 +1940,33 @@ void WriteToGXFIFO(u32 val)
u8 Read8(u32 addr)
{
switch (addr)
{
case 0x04000600:
return GXStat & 0xFF;
case 0x04000601:
{
return ((GXStat >> 8) & 0xFF) |
(PosMatrixStackPointer & 0x1F) |
((ProjMatrixStackPointer & 0x1) << 5);
}
case 0x04000602:
{
u32 fifolevel = CmdFIFO->Level();
return fifolevel & 0xFF;
}
case 0x04000603:
{
u32 fifolevel = CmdFIFO->Level();
return ((GXStat >> 24) & 0xFF) |
(fifolevel >> 8) |
(fifolevel < 128 ? (1<<1) : 0) |
(fifolevel == 0 ? (1<<2) : 0);
}
}
printf("unknown GPU3D read8 %08X\n", addr);
return 0;
}
@ -1954,6 +1981,22 @@ u16 Read16(u32 addr)
case 0x04000320:
return 46; // TODO, eventually
case 0x04000600:
{
return (GXStat & 0xFFFF) |
((PosMatrixStackPointer & 0x1F) << 8) |
((ProjMatrixStackPointer & 0x1) << 13);
}
case 0x04000602:
{
u32 fifolevel = CmdFIFO->Level();
return (GXStat >> 16) |
fifolevel |
(fifolevel < 128 ? (1<<9) : 0) |
(fifolevel == 0 ? (1<<10) : 0);
}
case 0x04000604:
return NumPolygons;
case 0x04000606:
@ -2027,6 +2070,22 @@ void Write8(u32 addr, u8 val)
AlphaRefVal = val & 0x1F;
AlphaRef = (DispCnt & (1<<2)) ? AlphaRefVal : 0;
return;
case 0x04000601:
if (val & 0x80)
{
GXStat &= ~0x8000;
ProjMatrixStackPointer = 0;
//PosMatrixStackPointer = 0;
TexMatrixStackPointer = 0;
}
return;
case 0x04000603:
val &= 0xC0;
GXStat &= 0x3FFFFFFF;
GXStat |= (val << 24);
CheckFIFOIRQ();
return;
}
if (addr >= 0x04000360 && addr < 0x04000380)
@ -2076,6 +2135,22 @@ void Write16(u32 addr, u16 val)
case 0x0400035C:
FogOffset = val & 0x7FFF;
return;
case 0x04000600:
if (val & 0x8000)
{
GXStat &= ~0x8000;
ProjMatrixStackPointer = 0;
//PosMatrixStackPointer = 0;
TexMatrixStackPointer = 0;
}
return;
case 0x04000602:
val &= 0xC000;
GXStat &= 0x3FFFFFFF;
GXStat |= (val << 16);
CheckFIFOIRQ();
return;
}
if (addr >= 0x04000330 && addr < 0x04000340)