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static uint8 GetPPU_2102(uint16 Address)
{
return (uint8)(PPU.OAMAddr);
}
static uint8 GetPPU_2103(uint16 Address)
{
return (((PPU.OAMAddr >> 8) & 1) | (PPU.OAMPriorityRotation << 7));
}
static uint8 GetPPU_RAM(uint16 Address)
{
return (Memory.FillRAM[Address]);
}
static uint8 GetPPU_2116(uint16 Address)
{
return (uint8)(PPU.VMA.Address);
}
static uint8 GetPPU_2117(uint16 Address)
{
return (PPU.VMA.Address >> 8);
}
static uint8 GetPPU_2121(uint16 Address)
{
return (PPU.CGADD);
}
static uint8 GetPPU_213x(uint16 Address)
{
if (PPU.Need16x8Mulitply)
{
int32 r = (int32) PPU.MatrixA * (int32)(PPU.MatrixB >> 8);
Memory.FillRAM[0x2134] = (uint8) r;
Memory.FillRAM[0x2135] = (uint8)(r >> 8);
Memory.FillRAM[0x2136] = (uint8)(r >> 16);
PPU.Need16x8Mulitply = FALSE;
}
return (Memory.FillRAM[Address]);
}
static uint8 GetPPU_2137(uint16 Address)
{
#ifdef DEBUGGER
missing.h_v_latch = 1;
#endif
#if 0
#ifdef CPU_SHUTDOWN
CPU.WaitAddress = CPU.PCAtOpcodeStart;
#endif
#endif
PPU.HVBeamCounterLatched = 1;
PPU.VBeamPosLatched = (uint16)
CPU.V_Counter;
PPU.HBeamPosLatched = (uint16)((CPU.Cycles * SNES_HCOUNTER_MAX) / Settings.H_Max);
// Causes screen flicker for Yoshi's Island if uncommented
//CLEAR_IRQ_SOURCE (PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE);
if (SNESGameFixes.NeedInit0x2137)
PPU.VBeamFlip = 0; //jyam sword world sfc2 & godzill
return (0);
}
static uint8 GetPPU_2138(uint16 Address)
{
uint8 byte = 0;
// Read OAM (sprite) control data
if (PPU.OAMAddr & 0x100)
{
if (!(PPU.OAMFlip & 1))
byte = PPU.OAMData [(PPU.OAMAddr & 0x10f) << 1];
else
{
byte = PPU.OAMData [((PPU.OAMAddr & 0x10f) << 1) + 1];
PPU.OAMAddr = (PPU.OAMAddr + 1) & 0x1ff;
}
}
else
{
if (!(PPU.OAMFlip & 1))
byte = PPU.OAMData [PPU.OAMAddr << 1];
else
{
byte = PPU.OAMData [(PPU.OAMAddr << 1) + 1];
++PPU.OAMAddr;
}
}
PPU.OAMFlip ^= 1;
return (byte);
}
static uint8 GetPPU_2139(uint16 Address)
{
uint8 byte = 0;
// Read vram low byte
#ifdef DEBUGGER
missing.vram_read = 1;
#endif
if (IPPU.FirstVRAMRead)
byte = Memory.VRAM[(PPU.VMA.Address << 1) & 0xFFFF];
else if (PPU.VMA.FullGraphicCount)
{
uint32 addr = PPU.VMA.Address - 1;
uint32 rem = addr & PPU.VMA.Mask1;
uint32 address =
(addr & ~PPU.VMA.Mask1)
+ (rem >> PPU.VMA.Shift)
+ ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3);
byte = Memory.VRAM[((address << 1) - 2) & 0xFFFF];
}
else
byte = Memory.VRAM[((PPU.VMA.Address << 1) - 2) & 0xffff];
if (!PPU.VMA.High)
{
PPU.VMA.Address += PPU.VMA.Increment;
IPPU.FirstVRAMRead = FALSE;
}
return byte;
}
static uint8 GetPPU_213A(uint16 Address)
{
uint8 byte = 0;
// Read vram high byte
#ifdef DEBUGGER
missing.vram_read = 1;
#endif
if (IPPU.FirstVRAMRead)
byte = Memory.VRAM[((PPU.VMA.Address << 1) + 1) & 0xffff];
else if (PPU.VMA.FullGraphicCount)
{
uint32 addr = PPU.VMA.Address - 1;
uint32 rem = addr & PPU.VMA.Mask1;
uint32 address =
(addr & ~PPU.VMA.Mask1)
+ (rem >> PPU.VMA.Shift)
+ ((rem & (PPU.VMA.FullGraphicCount - 1)) << 3);
byte = Memory.VRAM[((address << 1) - 1) & 0xFFFF];
}
else
byte = Memory.VRAM[((PPU.VMA.Address << 1) - 1) & 0xFFFF];
if (PPU.VMA.High)
{
PPU.VMA.Address += PPU.VMA.Increment;
IPPU.FirstVRAMRead = FALSE;
}
return byte;
}
static uint8 GetPPU_213B(uint16 Address)
{
uint8 byte = 0;
// Read palette data
#ifdef DEBUGGER
missing.cgram_read = 1;
#endif
if (PPU.CGFLIPRead)
byte = PPU.CGDATA[PPU.CGADD++] >> 8;
else
byte = PPU.CGDATA[PPU.CGADD] & 0xff;
PPU.CGFLIPRead ^= 1;
return (byte);
}
static uint8 GetPPU_213C(uint16 Address)
{
uint8 byte = 0;
// Horizontal counter value 0-339
#ifdef DEBUGGER
missing.h_counter_read = 1;
#endif
if (PPU.HBeamFlip)
byte = PPU.HBeamPosLatched >> 8;
else
byte = (uint8) PPU.HBeamPosLatched;
PPU.HBeamFlip ^= 1;
return byte;
}
static uint8 GetPPU_213D(uint16 Address)
{
uint8 byte = 0;
// Vertical counter value 0-262
#ifdef DEBUGGER
missing.v_counter_read = 1;
#endif
if (PPU.VBeamFlip)
byte = PPU.VBeamPosLatched >> 8;
else
byte = (uint8) PPU.VBeamPosLatched;
PPU.VBeamFlip ^= 1;
return byte;
}
static uint8 GetPPU_213E(uint16 Address)
{
// PPU time and range over flags
return (SNESGameFixes._0x213E_ReturnValue);
}
static uint8 GetPPU_213F(uint16 Address)
{
// NTSC/PAL and which field flags
PPU.VBeamFlip = PPU.HBeamFlip = 0;
return ((Settings.PAL ? 0x10 : 0) | (Memory.FillRAM[0x213f] & 0xc0));
}
static uint8 GetPPU_APUR(uint16 Address)
{
/*
case 0x2140: case 0x2141: case 0x2142: case 0x2143:
case 0x2144: case 0x2145: case 0x2146: case 0x2147:
case 0x2148: case 0x2149: case 0x214a: case 0x214b:
case 0x214c: case 0x214d: case 0x214e: case 0x214f:
case 0x2150: case 0x2151: case 0x2152: case 0x2153:
case 0x2154: case 0x2155: case 0x2156: case 0x2157:
case 0x2158: case 0x2159: case 0x215a: case 0x215b:
case 0x215c: case 0x215d: case 0x215e: case 0x215f:
case 0x2160: case 0x2161: case 0x2162: case 0x2163:
case 0x2164: case 0x2165: case 0x2166: case 0x2167:
case 0x2168: case 0x2169: case 0x216a: case 0x216b:
case 0x216c: case 0x216d: case 0x216e: case 0x216f:
case 0x2170: case 0x2171: case 0x2172: case 0x2173:
case 0x2174: case 0x2175: case 0x2176: case 0x2177:
case 0x2178: case 0x2179: case 0x217a: case 0x217b:
case 0x217c: case 0x217d: case 0x217e: case 0x217f:
*/
#ifdef SPCTOOL
return ((uint8) _SPCOutP[Address & 3]);
#else
// CPU.Flags |= DEBUG_MODE_FLAG;
#ifdef SPC700_SHUTDOWN
CPU.APU_APUExecuting = Settings.APUEnabled;
IAPU.WaitCounter++;
#endif
if (Settings.APUEnabled)
{
#ifdef CPU_SHUTDOWN
//CPU.WaitAddress = CPU.PCAtOpcodeStart;
#endif
if (!SNESGameFixes.APU_OutPorts_ReturnValueFix) return (APU.OutPorts[Address & 3]); // early exit
if (Address >= 0x2140
&& Address <= 0x2143
&& !CPU.V_Counter)
{
return (uint8)((Address & 1) ?
((rand() & 0xff00) >> 8) : (rand() & 0xff));
}
return (APU.OutPorts[Address & 3]);
}
/*
switch (Settings.SoundSkipMethod)
{
case 3 :
case 0 :
case 1 :
*/
#ifdef ASMCPU
CPU.rstatus |= (1 << (24 - 2));
#endif
CPU.BranchSkip = TRUE;
/*
break;
case 2 :
break;
}
*/
if ((Address & 3) < 2)
{
int r = rand();
if (r & 2)
{
if (r & 4)
return ((Address & 3) == 1 ? 0xaa : 0xbb);
return ((r >> 3) & 0xff);
}
}
else
{
int r = rand();
if (r & 2)
return ((r >> 3) & 0xff);
}
return (Memory.FillRAM[Address]);
#endif // SPCTOOL
}
static uint8 GetPPU_2180(uint16 Address)
{
uint8 byte = 0;
// Read WRAM
#ifdef DEBUGGER
missing.wram_read = 1;
#endif
byte = Memory.RAM[PPU.WRAM++];
PPU.WRAM &= 0x1FFFF;
return byte;
}
static uint8 GetPPU_ZERO(uint16 Address)
{
return 0;
}
static uint8 GetPPU_ONE(uint16 Address)
{
return 1;
}
uint8(*GetPPU[])(uint16 Address) =
{
GetPPU_RAM, GetPPU_RAM, GetPPU_2102, GetPPU_2103, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_2116, GetPPU_2117,
GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
GetPPU_RAM, GetPPU_2121, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM,
GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_213x, GetPPU_213x, GetPPU_213x, GetPPU_2137,
GetPPU_2138, GetPPU_2139, GetPPU_213A, GetPPU_213B, GetPPU_213C, GetPPU_213D, GetPPU_213E, GetPPU_213F,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR, GetPPU_APUR,
GetPPU_2180, GetPPU_RAM, GetPPU_RAM, GetPPU_RAM, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO,
GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO, GetPPU_ZERO,
GetPPU_ONE
};
uint8 S9xGetPPU(uint16 Address)
{
uint8 byte = 0;
if (Address < 0x2100) //not a real PPU reg
return 0; //treat as unmapped memory returning last byte on the bus
if (Address <= 0x2190)
return GetPPU[Address - 0x2100](Address);
#ifdef USE_SA1
if (Settings.SA1)
return (S9xGetSA1(Address));
#endif
if (Address <= 0x2fff || Address >= 0x3000 + 768)
{
switch (Address)
{
case 0x21c2 :
return (0x20);
case 0x21c3 :
return (0);
case 0x2800 :
// For Dai Kaijyu Monogatari II
if (Settings.SRTC)
return (S9xGetSRTC(Address));
/*FALL*/
default :
#ifdef DEBUGGER
missing.unknownppu_read = Address;
if (Settings.TraceUnknownRegisters)
{
sprintf(String, "Unknown register read: $%04X\n", Address);
S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String);
}
#endif
// XXX:
return (0); //Memory.FillRAM[Address]);
}
}
if (!Settings.SuperFX)
return (0x30);
byte = Memory.FillRAM[Address];
//if (Address != 0x3030 && Address != 0x3031)
//printf ("%04x\n", Address);
#ifdef CPU_SHUTDOWN
if (Address == 0x3030)
{
CPU.WaitAddress = CPU.PCAtOpcodeStart;
#ifdef ASMCPU
CPU.rstatus |= (1 << (24 - 3));
#endif
}
else
#endif
if (Address == 0x3031)
{
CLEAR_IRQ_SOURCE(GSU_IRQ_SOURCE);
Memory.FillRAM[0x3031] = byte & 0x7f;
}
return (byte);
}
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