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snes9x/ppu.cpp

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#include "snes9x.h"
#include "memmap.h"
#include "dma.h"
#include "apu/apu.h"
#include "fxemu.h"
#include "sdd1.h"
#include "srtc.h"
#include "controls.h"
#include "movie.h"
#include "display.h"
#ifdef NETPLAY_SUPPORT
#include "netplay.h"
#endif
#ifdef DEBUGGER
#include "debug.h"
#include "missing.h"
#endif
extern uint8 *HDMAMemPointers[8];
static inline void S9xLatchCounters (bool force)
{
if (force || (Memory.FillRAM[0x4213] & 0x80))
{
// Latch h and v counters, like the gun
#ifdef DEBUGGER
missing.h_v_latch = 1;
#endif
PPU.HVBeamCounterLatched = 1;
PPU.VBeamPosLatched = (uint16) CPU.V_Counter;
// From byuu:
// All dots are 4 cycles long, except dots 322 and 326. dots 322 and 326 are 6 cycles long.
// This holds true for all scanlines except scanline 240 on non-interlace odd frames.
// The reason for this is because this scanline is only 1360 cycles long,
// instead of 1364 like all other scanlines.
// This makes the effective range of hscan_pos 0-339 at all times.
int32 hc = CPU.Cycles;
if (Timings.H_Max == Timings.H_Max_Master) // 1364
{
if (hc >= 1292)
hc -= (ONE_DOT_CYCLE / 2);
if (hc >= 1308)
hc -= (ONE_DOT_CYCLE / 2);
}
PPU.HBeamPosLatched = (uint16) (hc / ONE_DOT_CYCLE);
Memory.FillRAM[0x213f] |= 0x40;
}
if (CPU.V_Counter > PPU.GunVLatch || (CPU.V_Counter == PPU.GunVLatch && CPU.Cycles >= PPU.GunHLatch * ONE_DOT_CYCLE))
PPU.GunVLatch = 1000;
}
static inline void S9xTryGunLatch (bool force)
{
if (CPU.V_Counter > PPU.GunVLatch || (CPU.V_Counter == PPU.GunVLatch && CPU.Cycles >= PPU.GunHLatch * ONE_DOT_CYCLE))
{
if (force || (Memory.FillRAM[0x4213] & 0x80))
{
#ifdef DEBUGGER
missing.h_v_latch = 1;
#endif
PPU.HVBeamCounterLatched = 1;
PPU.VBeamPosLatched = (uint16) PPU.GunVLatch;
PPU.HBeamPosLatched = (uint16) PPU.GunHLatch;
Memory.FillRAM[0x213f] |= 0x40;
}
PPU.GunVLatch = 1000;
}
}
static int CyclesUntilNext (int hc, int vc)
{
int32 total = 0;
int vpos = CPU.V_Counter;
if (vc - vpos > 0)
{
// It's still in this frame */
// Add number of lines
total += (vc - vpos) * Timings.H_Max_Master;
// If line 240 is in there and we're odd, subtract a dot
if (vpos <= 240 && vc > 240 && Timings.InterlaceField & !IPPU.Interlace)
total -= ONE_DOT_CYCLE;
}
else
{
if (vc == vpos && (hc > CPU.Cycles))
{
return hc;
}
total += (Timings.V_Max - vpos) * Timings.H_Max_Master;
if (vpos <= 240 && Timings.InterlaceField && !IPPU.Interlace)
total -= ONE_DOT_CYCLE;
total += (vc) * Timings.H_Max_Master;
if (vc > 240 && !Timings.InterlaceField && !IPPU.Interlace)
total -= ONE_DOT_CYCLE;
}
total += hc;
return total;
}
void S9xUpdateIRQPositions (bool initial)
{
PPU.HTimerPosition = PPU.IRQHBeamPos * ONE_DOT_CYCLE + Timings.IRQTriggerCycles;
PPU.HTimerPosition -= PPU.IRQHBeamPos ? 0 : ONE_DOT_CYCLE;
PPU.HTimerPosition += PPU.IRQHBeamPos > 322 ? (ONE_DOT_CYCLE / 2) : 0;
PPU.HTimerPosition += PPU.IRQHBeamPos > 326 ? (ONE_DOT_CYCLE / 2) : 0;
PPU.VTimerPosition = PPU.IRQVBeamPos;
if (PPU.VTimerEnabled && (PPU.VTimerPosition >= (Timings.V_Max + (IPPU.Interlace ? 1 : 0))))
{
Timings.NextIRQTimer = 0x0fffffff;
}
else if (!PPU.HTimerEnabled && !PPU.VTimerEnabled)
{
Timings.NextIRQTimer = 0x0fffffff;
}
else if (PPU.HTimerEnabled && !PPU.VTimerEnabled)
{
int v_pos = CPU.V_Counter;
Timings.NextIRQTimer = PPU.HTimerPosition;
if (CPU.Cycles > Timings.NextIRQTimer - Timings.IRQTriggerCycles)
{
Timings.NextIRQTimer += Timings.H_Max;
v_pos++;
}
// Check for short dot scanline
if (v_pos == 240 && Timings.InterlaceField && !IPPU.Interlace)
{
Timings.NextIRQTimer -= PPU.IRQHBeamPos <= 322 ? ONE_DOT_CYCLE / 2 : 0;
Timings.NextIRQTimer -= PPU.IRQHBeamPos <= 326 ? ONE_DOT_CYCLE / 2 : 0;
}
}
else if (!PPU.HTimerEnabled && PPU.VTimerEnabled)
{
if (CPU.V_Counter == PPU.VTimerPosition && initial)
Timings.NextIRQTimer = CPU.Cycles + Timings.IRQTriggerCycles - ONE_DOT_CYCLE;
else
Timings.NextIRQTimer = CyclesUntilNext (Timings.IRQTriggerCycles - ONE_DOT_CYCLE, PPU.VTimerPosition);
}
else
{
Timings.NextIRQTimer = CyclesUntilNext (PPU.HTimerPosition, PPU.VTimerPosition);
// Check for short dot scanline
int field = Timings.InterlaceField;
if (PPU.VTimerPosition < CPU.V_Counter ||
(PPU.VTimerPosition == CPU.V_Counter && Timings.NextIRQTimer > Timings.H_Max))
{
field = !field;
}
if (PPU.VTimerPosition == 240 && field && !IPPU.Interlace)
{
Timings.NextIRQTimer -= PPU.IRQHBeamPos <= 322 ? ONE_DOT_CYCLE / 2 : 0;
Timings.NextIRQTimer -= PPU.IRQHBeamPos <= 326 ? ONE_DOT_CYCLE / 2 : 0;
}
}
#ifdef DEBUGGER
S9xTraceFormattedMessage("--- IRQ Timer HC:%d VC:%d set %d cycles HTimer:%d Pos:%04d->%04d VTimer:%d Pos:%03d->%03d", CPU.Cycles, CPU.V_Counter,
Timings.NextIRQTimer, PPU.HTimerEnabled, PPU.IRQHBeamPos, PPU.HTimerPosition, PPU.VTimerEnabled, PPU.IRQVBeamPos, PPU.VTimerPosition);
#endif
}
void S9xFixColourBrightness (void)
{
IPPU.XB = mul_brightness[PPU.Brightness];
for (int i = 0; i < 64; i++)
{
if (i > IPPU.XB[0x1f])
brightness_cap[i] = IPPU.XB[0x1f];
else
brightness_cap[i] = i;
}
for (int i = 0; i < 256; i++)
{
IPPU.Red[i] = IPPU.XB[(PPU.CGDATA[i]) & 0x1f];
IPPU.Green[i] = IPPU.XB[(PPU.CGDATA[i] >> 5) & 0x1f];
IPPU.Blue[i] = IPPU.XB[(PPU.CGDATA[i] >> 10) & 0x1f];
IPPU.ScreenColors[i] = BUILD_PIXEL(IPPU.Red[i], IPPU.Green[i], IPPU.Blue[i]);
}
}
void S9xSetPPU (uint8 Byte, uint16 Address)
{
// MAP_PPU: $2000-$3FFF
if (CPU.InDMAorHDMA)
{
if (CPU.CurrentDMAorHDMAChannel >= 0 && DMA[CPU.CurrentDMAorHDMAChannel].ReverseTransfer)
{
// S9xSetPPU() is called to write to DMA[].AAddress
if ((Address & 0xff00) == 0x2100)
{
// Cannot access to Address Bus B ($2100-$21ff) via (H)DMA
return;
}
else
{
// 0x2000-0x3FFF is connected to Address Bus A
// SA1, SuperFX and SRTC are mapped here
// I don't bother for now...
return;
}
}
else
{
// S9xSetPPU() is called to read from $21xx
// Take care of DMA wrapping
if (Address > 0x21ff)
Address = 0x2100 + (Address & 0xff);
}
}
#ifdef DEBUGGER
if (CPU.InHDMA)
S9xTraceFormattedMessage("--- HDMA PPU %04X -> %02X", Address, Byte);
#endif
if (Settings.MSU1 && (Address & 0xfff8) == 0x2000) // MSU-1
S9xMSU1WritePort(Address & 7, Byte);
else
if ((Address & 0xffc0) == 0x2140) // APUIO0, APUIO1, APUIO2, APUIO3
// write_port will run the APU until given clock before writing value
S9xAPUWritePort(Address & 3, Byte);
else
if (Address <= 0x2183)
{
switch (Address)
{
case 0x2100: // INIDISP
if (Byte != Memory.FillRAM[0x2100])
{
FLUSH_REDRAW();
if (PPU.Brightness != (Byte & 0xf))
{
IPPU.ColorsChanged = TRUE;
PPU.Brightness = Byte & 0xf;
S9xFixColourBrightness();
S9xBuildDirectColourMaps();
if (PPU.Brightness > IPPU.MaxBrightness)
IPPU.MaxBrightness = PPU.Brightness;
}
if ((Memory.FillRAM[0x2100] & 0x80) != (Byte & 0x80))
{
IPPU.ColorsChanged = TRUE;
PPU.ForcedBlanking = (Byte >> 7) & 1;
}
}
if ((Memory.FillRAM[0x2100] & 0x80) && CPU.V_Counter == PPU.ScreenHeight + FIRST_VISIBLE_LINE)
{
PPU.OAMAddr = PPU.SavedOAMAddr;
uint8 tmp = 0;
if (PPU.OAMPriorityRotation)
tmp = (PPU.OAMAddr & 0xfe) >> 1;
if ((PPU.OAMFlip & 1) || PPU.FirstSprite != tmp)
{
PPU.FirstSprite = tmp;
IPPU.OBJChanged = TRUE;
}
PPU.OAMFlip = 0;
}
break;
case 0x2101: // OBSEL
if (Byte != Memory.FillRAM[0x2101])
{
FLUSH_REDRAW();
PPU.OBJNameBase = (Byte & 3) << 14;
PPU.OBJNameSelect = ((Byte >> 3) & 3) << 13;
PPU.OBJSizeSelect = (Byte >> 5) & 7;
IPPU.OBJChanged = TRUE;
}
break;
case 0x2102: // OAMADDL
PPU.OAMAddr = ((Memory.FillRAM[0x2103] & 1) << 8) | Byte;
PPU.OAMFlip = 0;
PPU.OAMReadFlip = 0;
PPU.SavedOAMAddr = PPU.OAMAddr;
if (PPU.OAMPriorityRotation && PPU.FirstSprite != (PPU.OAMAddr >> 1))
{
PPU.FirstSprite = (PPU.OAMAddr & 0xfe) >> 1;
IPPU.OBJChanged = TRUE;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
break;
case 0x2103: // OAMADDH
PPU.OAMAddr = ((Byte & 1) << 8) | Memory.FillRAM[0x2102];
PPU.OAMPriorityRotation = (Byte & 0x80) ? 1 : 0;
if (PPU.OAMPriorityRotation)
{
if (PPU.FirstSprite != (PPU.OAMAddr >> 1))
{
PPU.FirstSprite = (PPU.OAMAddr & 0xfe) >> 1;
IPPU.OBJChanged = TRUE;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
}
else
{
if (PPU.FirstSprite != 0)
{
PPU.FirstSprite = 0;
IPPU.OBJChanged = TRUE;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
}
PPU.OAMFlip = 0;
PPU.OAMReadFlip = 0;
PPU.SavedOAMAddr = PPU.OAMAddr;
break;
case 0x2104: // OAMDATA
REGISTER_2104(Byte);
break;
case 0x2105: // BGMODE
if (Byte != Memory.FillRAM[0x2105])
{
FLUSH_REDRAW();
PPU.BG[0].BGSize = (Byte >> 4) & 1;
PPU.BG[1].BGSize = (Byte >> 5) & 1;
PPU.BG[2].BGSize = (Byte >> 6) & 1;
PPU.BG[3].BGSize = (Byte >> 7) & 1;
PPU.BGMode = Byte & 7;
// BJ: BG3Priority only takes effect if BGMode == 1 and the bit is set
PPU.BG3Priority = ((Byte & 0x0f) == 0x09);
if (PPU.BGMode == 6 || PPU.BGMode == 5 || PPU.BGMode == 7)
IPPU.Interlace = Memory.FillRAM[0x2133] & 1;
else
IPPU.Interlace = 0;
#ifdef DEBUGGER
missing.modes[PPU.BGMode] = 1;
#endif
}
break;
case 0x2106: // MOSAIC
if (Byte != Memory.FillRAM[0x2106])
{
FLUSH_REDRAW();
PPU.MosaicStart = CPU.V_Counter;
if (PPU.MosaicStart > PPU.ScreenHeight)
PPU.MosaicStart = 0;
PPU.Mosaic = (Byte >> 4) + 1;
PPU.BGMosaic[0] = (Byte & 1);
PPU.BGMosaic[1] = (Byte & 2);
PPU.BGMosaic[2] = (Byte & 4);
PPU.BGMosaic[3] = (Byte & 8);
#ifdef DEBUGGER
if ((Byte & 0xf0) && (Byte & 0x0f))
missing.mosaic = 1;
#endif
}
break;
case 0x2107: // BG1SC
if (Byte != Memory.FillRAM[0x2107])
{
FLUSH_REDRAW();
PPU.BG[0].SCSize = Byte & 3;
PPU.BG[0].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x2108: // BG2SC
if (Byte != Memory.FillRAM[0x2108])
{
FLUSH_REDRAW();
PPU.BG[1].SCSize = Byte & 3;
PPU.BG[1].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x2109: // BG3SC
if (Byte != Memory.FillRAM[0x2109])
{
FLUSH_REDRAW();
PPU.BG[2].SCSize = Byte & 3;
PPU.BG[2].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x210a: // BG4SC
if (Byte != Memory.FillRAM[0x210a])
{
FLUSH_REDRAW();
PPU.BG[3].SCSize = Byte & 3;
PPU.BG[3].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x210b: // BG12NBA
if (Byte != Memory.FillRAM[0x210b])
{
FLUSH_REDRAW();
PPU.BG[0].NameBase = (Byte & 7) << 12;
PPU.BG[1].NameBase = ((Byte >> 4) & 7) << 12;
}
break;
case 0x210c: // BG34NBA
if (Byte != Memory.FillRAM[0x210c])
{
FLUSH_REDRAW();
PPU.BG[2].NameBase = (Byte & 7) << 12;
PPU.BG[3].NameBase = ((Byte >> 4) & 7) << 12;
}
break;
case 0x210d: // BG1HOFS, M7HOFS
PPU.BG[0].HOffset = (Byte << 8) | (PPU.BGnxOFSbyte & ~7) | ((PPU.BG[0].HOffset >> 8) & 7);
PPU.M7HOFS = (Byte << 8) | PPU.M7byte;
PPU.BGnxOFSbyte = Byte;
PPU.M7byte = Byte;
break;
case 0x210e: // BG1VOFS, M7VOFS
PPU.BG[0].VOffset = (Byte << 8) | PPU.BGnxOFSbyte;
PPU.M7VOFS = (Byte << 8) | PPU.M7byte;
PPU.BGnxOFSbyte = Byte;
PPU.M7byte = Byte;
break;
case 0x210f: // BG2HOFS
PPU.BG[1].HOffset = (Byte << 8) | (PPU.BGnxOFSbyte & ~7) | ((PPU.BG[1].HOffset >> 8) & 7);
PPU.BGnxOFSbyte = Byte;
break;
case 0x2110: // BG2VOFS
PPU.BG[1].VOffset = (Byte << 8) | PPU.BGnxOFSbyte;
PPU.BGnxOFSbyte = Byte;
break;
case 0x2111: // BG3HOFS
PPU.BG[2].HOffset = (Byte << 8) | (PPU.BGnxOFSbyte & ~7) | ((PPU.BG[2].HOffset >> 8) & 7);
PPU.BGnxOFSbyte = Byte;
break;
case 0x2112: // BG3VOFS
PPU.BG[2].VOffset = (Byte << 8) | PPU.BGnxOFSbyte;
PPU.BGnxOFSbyte = Byte;
break;
case 0x2113: // BG4HOFS
PPU.BG[3].HOffset = (Byte << 8) | (PPU.BGnxOFSbyte & ~7) | ((PPU.BG[3].HOffset >> 8) & 7);
PPU.BGnxOFSbyte = Byte;
break;
case 0x2114: // BG4VOFS
PPU.BG[3].VOffset = (Byte << 8) | PPU.BGnxOFSbyte;
PPU.BGnxOFSbyte = Byte;
break;
case 0x2115: // VMAIN
PPU.VMA.High = (Byte & 0x80) == 0 ? FALSE : TRUE;
switch (Byte & 3)
{
case 0: PPU.VMA.Increment = 1; break;
case 1: PPU.VMA.Increment = 32; break;
case 2: PPU.VMA.Increment = 128; break;
case 3: PPU.VMA.Increment = 128; break;
}
if (Byte & 0x0c)
{
static uint16 Shift[4] = { 0, 5, 6, 7 };
static uint16 IncCount[4] = { 0, 32, 64, 128 };
uint8 i = (Byte & 0x0c) >> 2;
PPU.VMA.FullGraphicCount = IncCount[i];
PPU.VMA.Mask1 = IncCount[i] * 8 - 1;
PPU.VMA.Shift = Shift[i];
#ifdef DEBUGGER
missing.vram_full_graphic_inc = (Byte & 0x0c) >> 2;
#endif
}
else
PPU.VMA.FullGraphicCount = 0;
#ifdef DEBUGGER
if (Byte & 3)
missing.vram_inc = Byte & 3;
#endif
break;
case 0x2116: // VMADDL
PPU.VMA.Address &= 0xff00;
PPU.VMA.Address |= Byte;
S9xUpdateVRAMReadBuffer();
break;
case 0x2117: // VMADDH
PPU.VMA.Address &= 0x00ff;
PPU.VMA.Address |= Byte << 8;
S9xUpdateVRAMReadBuffer();
break;
case 0x2118: // VMDATAL
REGISTER_2118(Byte);
break;
case 0x2119: // VMDATAH
REGISTER_2119(Byte);
break;
case 0x211a: // M7SEL
if (Byte != Memory.FillRAM[0x211a])
{
FLUSH_REDRAW();
PPU.Mode7Repeat = Byte >> 6;
if (PPU.Mode7Repeat == 1)
PPU.Mode7Repeat = 0;
PPU.Mode7VFlip = (Byte & 2) >> 1;
PPU.Mode7HFlip = Byte & 1;
}
break;
case 0x211b: // M7A
PPU.MatrixA = PPU.M7byte | (Byte << 8);
PPU.Need16x8Mulitply = TRUE;
PPU.M7byte = Byte;
break;
case 0x211c: // M7B
PPU.MatrixB = PPU.M7byte | (Byte << 8);
PPU.Need16x8Mulitply = TRUE;
PPU.M7byte = Byte;
break;
case 0x211d: // M7C
PPU.MatrixC = PPU.M7byte | (Byte << 8);
PPU.M7byte = Byte;
break;
case 0x211e: // M7D
PPU.MatrixD = PPU.M7byte | (Byte << 8);
PPU.M7byte = Byte;
break;
case 0x211f: // M7X
PPU.CentreX = PPU.M7byte | (Byte << 8);
PPU.M7byte = Byte;
break;
case 0x2120: // M7Y
PPU.CentreY = PPU.M7byte | (Byte << 8);
PPU.M7byte = Byte;
break;
case 0x2121: // CGADD
PPU.CGFLIP = 0;
PPU.CGFLIPRead = 0;
PPU.CGADD = Byte;
break;
case 0x2122: // CGDATA
REGISTER_2122(Byte);
break;
case 0x2123: // W12SEL
if (Byte != Memory.FillRAM[0x2123])
{
FLUSH_REDRAW();
PPU.ClipWindow1Enable[0] = !!(Byte & 0x02);
PPU.ClipWindow1Enable[1] = !!(Byte & 0x20);
PPU.ClipWindow2Enable[0] = !!(Byte & 0x08);
PPU.ClipWindow2Enable[1] = !!(Byte & 0x80);
PPU.ClipWindow1Inside[0] = !(Byte & 0x01);
PPU.ClipWindow1Inside[1] = !(Byte & 0x10);
PPU.ClipWindow2Inside[0] = !(Byte & 0x04);
PPU.ClipWindow2Inside[1] = !(Byte & 0x40);
PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
if (Byte & 0x80)
missing.window2[1] = 1;
if (Byte & 0x20)
missing.window1[1] = 1;
if (Byte & 0x08)
missing.window2[0] = 1;
if (Byte & 0x02)
missing.window1[0] = 1;
#endif
}
break;
case 0x2124: // W34SEL
if (Byte != Memory.FillRAM[0x2124])
{
FLUSH_REDRAW();
PPU.ClipWindow1Enable[2] = !!(Byte & 0x02);
PPU.ClipWindow1Enable[3] = !!(Byte & 0x20);
PPU.ClipWindow2Enable[2] = !!(Byte & 0x08);
PPU.ClipWindow2Enable[3] = !!(Byte & 0x80);
PPU.ClipWindow1Inside[2] = !(Byte & 0x01);
PPU.ClipWindow1Inside[3] = !(Byte & 0x10);
PPU.ClipWindow2Inside[2] = !(Byte & 0x04);
PPU.ClipWindow2Inside[3] = !(Byte & 0x40);
PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
if (Byte & 0x80)
missing.window2[3] = 1;
if (Byte & 0x20)
missing.window1[3] = 1;
if (Byte & 0x08)
missing.window2[2] = 1;
if (Byte & 0x02)
missing.window1[2] = 1;
#endif
}
break;
case 0x2125: // WOBJSEL
if (Byte != Memory.FillRAM[0x2125])
{
FLUSH_REDRAW();
PPU.ClipWindow1Enable[4] = !!(Byte & 0x02);
PPU.ClipWindow1Enable[5] = !!(Byte & 0x20);
PPU.ClipWindow2Enable[4] = !!(Byte & 0x08);
PPU.ClipWindow2Enable[5] = !!(Byte & 0x80);
PPU.ClipWindow1Inside[4] = !(Byte & 0x01);
PPU.ClipWindow1Inside[5] = !(Byte & 0x10);
PPU.ClipWindow2Inside[4] = !(Byte & 0x04);
PPU.ClipWindow2Inside[5] = !(Byte & 0x40);
PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
if (Byte & 0x80)
missing.window2[5] = 1;
if (Byte & 0x20)
missing.window1[5] = 1;
if (Byte & 0x08)
missing.window2[4] = 1;
if (Byte & 0x02)
missing.window1[4] = 1;
#endif
}
break;
case 0x2126: // WH0
if (Byte != Memory.FillRAM[0x2126])
{
FLUSH_REDRAW();
PPU.Window1Left = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2127: // WH1
if (Byte != Memory.FillRAM[0x2127])
{
FLUSH_REDRAW();
PPU.Window1Right = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2128: // WH2
if (Byte != Memory.FillRAM[0x2128])
{
FLUSH_REDRAW();
PPU.Window2Left = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2129: // WH3
if (Byte != Memory.FillRAM[0x2129])
{
FLUSH_REDRAW();
PPU.Window2Right = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212a: // WBGLOG
if (Byte != Memory.FillRAM[0x212a])
{
FLUSH_REDRAW();
PPU.ClipWindowOverlapLogic[0] = (Byte & 0x03);
PPU.ClipWindowOverlapLogic[1] = (Byte & 0x0c) >> 2;
PPU.ClipWindowOverlapLogic[2] = (Byte & 0x30) >> 4;
PPU.ClipWindowOverlapLogic[3] = (Byte & 0xc0) >> 6;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212b: // WOBJLOG
if (Byte != Memory.FillRAM[0x212b])
{
FLUSH_REDRAW();
PPU.ClipWindowOverlapLogic[4] = (Byte & 0x03);
PPU.ClipWindowOverlapLogic[5] = (Byte & 0x0c) >> 2;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212c: // TM
if (Byte != Memory.FillRAM[0x212c])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212d: // TS
if (Byte != Memory.FillRAM[0x212d])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
if (Byte & 0x1f)
missing.subscreen = 1;
#endif
}
break;
case 0x212e: // TMW
if (Byte != Memory.FillRAM[0x212e])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212f: // TSW
if (Byte != Memory.FillRAM[0x212f])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2130: // CGWSEL
if (Byte != Memory.FillRAM[0x2130])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
#ifdef DEBUGGER
if ((Byte & 1) && (PPU.BGMode == 3 || PPU.BGMode == 4 || PPU.BGMode == 7))
missing.direct = 1;
#endif
}
break;
case 0x2131: // CGADSUB
if (Byte != Memory.FillRAM[0x2131])
{
FLUSH_REDRAW();
#ifdef DEBUGGER
if (Byte & 0x80)
{
if (Memory.FillRAM[0x2130] & 0x02)
missing.subscreen_sub = 1;
else
missing.fixed_colour_sub = 1;
}
else
{
if (Memory.FillRAM[0x2130] & 0x02)
missing.subscreen_add = 1;
else
missing.fixed_colour_add = 1;
}
#endif
}
break;
case 0x2132: // COLDATA
if (Byte != Memory.FillRAM[0x2132])
{
FLUSH_REDRAW();
if (Byte & 0x80)
PPU.FixedColourBlue = Byte & 0x1f;
if (Byte & 0x40)
PPU.FixedColourGreen = Byte & 0x1f;
if (Byte & 0x20)
PPU.FixedColourRed = Byte & 0x1f;
}
break;
case 0x2133: // SETINI
if (Byte != Memory.FillRAM[0x2133])
{
if ((Memory.FillRAM[0x2133] ^ Byte) & 8)
{
FLUSH_REDRAW();
IPPU.PseudoHires = Byte & 8;
}
if (Byte & 0x04)
{
PPU.ScreenHeight = SNES_HEIGHT_EXTENDED;
if (IPPU.DoubleHeightPixels)
IPPU.RenderedScreenHeight = PPU.ScreenHeight << 1;
else
IPPU.RenderedScreenHeight = PPU.ScreenHeight;
#ifdef DEBUGGER
missing.lines_239 = 1;
#endif
}
else
{
PPU.ScreenHeight = SNES_HEIGHT;
if (IPPU.DoubleHeightPixels)
IPPU.RenderedScreenHeight = PPU.ScreenHeight << 1;
else
IPPU.RenderedScreenHeight = PPU.ScreenHeight;
}
if ((Memory.FillRAM[0x2133] ^ Byte) & 3)
{
FLUSH_REDRAW();
if ((Memory.FillRAM[0x2133] ^ Byte) & 2)
IPPU.OBJChanged = TRUE;
IPPU.Interlace = Byte & 1;
IPPU.InterlaceOBJ = Byte & 2;
}
#ifdef DEBUGGER
if (Byte & 0x40)
missing.mode7_bgmode = 1;
if (Byte & 0x08)
missing.pseudo_512 = 1;
if (Byte & 0x02)
missing.sprite_double_height = 1;
if (Byte & 0x01)
missing.interlace = 1;
#endif
}
break;
case 0x2134: // MPYL
case 0x2135: // MPYM
case 0x2136: // MPYH
case 0x2137: // SLHV
case 0x2138: // OAMDATAREAD
case 0x2139: // VMDATALREAD
case 0x213a: // VMDATAHREAD
case 0x213b: // CGDATAREAD
case 0x213c: // OPHCT
case 0x213d: // OPVCT
case 0x213e: // STAT77
case 0x213f: // STAT78
return;
case 0x2180: // WMDATA
if (!CPU.InWRAMDMAorHDMA)
REGISTER_2180(Byte);
break;
case 0x2181: // WMADDL
if (!CPU.InWRAMDMAorHDMA)
{
PPU.WRAM &= 0x1ff00;
PPU.WRAM |= Byte;
}
break;
case 0x2182: // WMADDM
if (!CPU.InWRAMDMAorHDMA)
{
PPU.WRAM &= 0x100ff;
PPU.WRAM |= Byte << 8;
}
break;
case 0x2183: // WMADDH
if (!CPU.InWRAMDMAorHDMA)
{
PPU.WRAM &= 0x0ffff;
PPU.WRAM |= Byte << 16;
PPU.WRAM &= 0x1ffff;
}
break;
}
}
else
{
if (Settings.SuperFX && Address >= 0x3000 && Address <= 0x32ff)
{
S9xSetSuperFX(Byte, Address);
return;
}
else
if (Settings.SA1 && Address >= 0x2200)
{
if (Address <= 0x23ff)
S9xSetSA1(Byte, Address);
else
Memory.FillRAM[Address] = Byte;
return;
}
else
if (Settings.BS && Address >= 0x2188 && Address <= 0x219f)
S9xSetBSXPPU(Byte, Address);
else
if (Settings.SRTC && Address == 0x2801)
S9xSetSRTC(Byte, Address);
#ifdef DEBUGGER
else
{
missing.unknownppu_write = Address;
if (Settings.TraceUnknownRegisters)
{
sprintf(String, "Unknown register write: $%02X->$%04X\n", Byte, Address);
S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String);
}
}
#endif
}
Memory.FillRAM[Address] = Byte;
}
uint8 S9xGetPPU (uint16 Address)
{
// MAP_PPU: $2000-$3FFF
if (Settings.MSU1 && (Address & 0xfff8) == 0x2000)
return (S9xMSU1ReadPort(Address & 7));
else
if (Address < 0x2100)
return (OpenBus);
if (CPU.InDMAorHDMA)
{
if (CPU.CurrentDMAorHDMAChannel >= 0 && !DMA[CPU.CurrentDMAorHDMAChannel].ReverseTransfer)
{
// S9xGetPPU() is called to read from DMA[].AAddress
if ((Address & 0xff00) == 0x2100)
// Cannot access to Address Bus B ($2100-$21FF) via (H)DMA
return (OpenBus);
else
// $2200-$3FFF are connected to Address Bus A
// SA1, SuperFX and SRTC are mapped here
// I don't bother for now...
return (OpenBus);
}
else
{
// S9xGetPPU() is called to write to $21xx
// Take care of DMA wrapping
if (Address > 0x21ff)
Address = 0x2100 + (Address & 0xff);
}
}
if ((Address & 0xffc0) == 0x2140) // APUIO0, APUIO1, APUIO2, APUIO3
// read_port will run the APU until given APU time before reading value
return (S9xAPUReadPort(Address & 3));
else
if (Address <= 0x2183)
{
uint8 byte;
switch (Address)
{
case 0x2104: // OAMDATA
case 0x2105: // BGMODE
case 0x2106: // MOSAIC
case 0x2108: // BG2SC
case 0x2109: // BG3SC
case 0x210a: // BG4SC
case 0x2114: // BG4VOFS
case 0x2115: // VMAIN
case 0x2116: // VMADDL
case 0x2118: // VMDATAL
case 0x2119: // VMDATAH
case 0x211a: // M7SEL
case 0x2124: // W34SEL
case 0x2125: // WOBJSEL
case 0x2126: // WH0
case 0x2128: // WH2
case 0x2129: // WH3
case 0x212a: // WBGLOG
return (PPU.OpenBus1);
case 0x2134: // MPYL
case 0x2135: // MPYM
case 0x2136: // MPYH
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;
}
#ifdef DEBUGGER
missing.matrix_multiply = 1;
#endif
return (PPU.OpenBus1 = Memory.FillRAM[Address]);
case 0x2137: // SLHV
S9xLatchCounters(0);
return (PPU.OpenBus1);
case 0x2138: // OAMDATAREAD
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;
if (PPU.OAMPriorityRotation && PPU.FirstSprite != (PPU.OAMAddr >> 1))
{
PPU.FirstSprite = (PPU.OAMAddr & 0xfe) >> 1;
IPPU.OBJChanged = TRUE;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
}
}
else
{
if (!(PPU.OAMFlip & 1))
byte = PPU.OAMData[PPU.OAMAddr << 1];
else
{
byte = PPU.OAMData[(PPU.OAMAddr << 1) + 1];
++PPU.OAMAddr;
if (PPU.OAMPriorityRotation && PPU.FirstSprite != (PPU.OAMAddr >> 1))
{
PPU.FirstSprite = (PPU.OAMAddr & 0xfe) >> 1;
IPPU.OBJChanged = TRUE;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
}
}
PPU.OAMFlip ^= 1;
#ifdef DEBUGGER
missing.oam_read = 1;
#endif
return (PPU.OpenBus1 = byte);
case 0x2139: // VMDATALREAD
byte = PPU.VRAMReadBuffer & 0xff;
if (!PPU.VMA.High)
{
S9xUpdateVRAMReadBuffer();
PPU.VMA.Address += PPU.VMA.Increment;
}
#ifdef DEBUGGER
missing.vram_read = 1;
#endif
return (PPU.OpenBus1 = byte);
case 0x213a: // VMDATAHREAD
byte = (PPU.VRAMReadBuffer >> 8) & 0xff;
if (PPU.VMA.High)
{
S9xUpdateVRAMReadBuffer();
PPU.VMA.Address += PPU.VMA.Increment;
}
#ifdef DEBUGGER
missing.vram_read = 1;
#endif
return (PPU.OpenBus1 = byte);
case 0x213b: // CGDATAREAD
if (PPU.CGFLIPRead)
byte = (PPU.OpenBus2 & 0x80) | ((PPU.CGDATA[PPU.CGADD++] >> 8) & 0x7f);
else
byte = PPU.CGDATA[PPU.CGADD] & 0xff;
PPU.CGFLIPRead ^= 1;
#ifdef DEBUGGER
missing.cgram_read = 1;
#endif
return (PPU.OpenBus2 = byte);
case 0x213c: // OPHCT
S9xTryGunLatch(false);
if (PPU.HBeamFlip)
byte = (PPU.OpenBus2 & 0xfe) | ((PPU.HBeamPosLatched >> 8) & 0x01);
else
byte = (uint8) PPU.HBeamPosLatched;
PPU.HBeamFlip ^= 1;
#ifdef DEBUGGER
missing.h_counter_read = 1;
#endif
return (PPU.OpenBus2 = byte);
case 0x213d: // OPVCT
S9xTryGunLatch(false);
if (PPU.VBeamFlip)
byte = (PPU.OpenBus2 & 0xfe) | ((PPU.VBeamPosLatched >> 8) & 0x01);
else
byte = (uint8) PPU.VBeamPosLatched;
PPU.VBeamFlip ^= 1;
#ifdef DEBUGGER
missing.v_counter_read = 1;
#endif
return (PPU.OpenBus2 = byte);
case 0x213e: // STAT77
FLUSH_REDRAW();
byte = (PPU.OpenBus1 & 0x10) | PPU.RangeTimeOver | Model->_5C77;
return (PPU.OpenBus1 = byte);
case 0x213f: // STAT78
S9xTryGunLatch(false);
PPU.VBeamFlip = PPU.HBeamFlip = 0;
byte = (PPU.OpenBus2 & 0x20) | (Memory.FillRAM[0x213f] & 0xc0) | (Settings.PAL ? 0x10 : 0) | Model->_5C78;
Memory.FillRAM[0x213f] &= ~0x40;
return (PPU.OpenBus2 = byte);
case 0x2180: // WMDATA
if (!CPU.InWRAMDMAorHDMA)
{
byte = Memory.RAM[PPU.WRAM++];
PPU.WRAM &= 0x1ffff;
}
else
byte = OpenBus;
#ifdef DEBUGGER
missing.wram_read = 1;
#endif
return (byte);
default:
return (OpenBus);
}
}
else
{
if (Settings.SuperFX && Address >= 0x3000 && Address <= 0x32ff)
return (S9xGetSuperFX(Address));
else
if (Settings.SA1 && Address >= 0x2200)
return (S9xGetSA1(Address));
else
if (Settings.BS && Address >= 0x2188 && Address <= 0x219f)
return (S9xGetBSXPPU(Address));
else
if (Settings.SRTC && Address == 0x2800)
return (S9xGetSRTC(Address));
else
switch (Address)
{
case 0x21c2:
if (Model->_5C77 == 2)
return (0x20);
return (OpenBus);
case 0x21c3:
if (Model->_5C77 == 2)
return (0);
return (OpenBus);
default:
return (OpenBus);
}
}
}
void S9xSetCPU (uint8 Byte, uint16 Address)
{
if (Address < 0x4200)
{
switch (Address)
{
case 0x4016: // JOYSER0
S9xSetJoypadLatch(Byte & 1);
break;
case 0x4017: // JOYSER1
return;
default:
break;
}
}
else
if ((Address & 0xff80) == 0x4300)
{
if (CPU.InDMAorHDMA)
return;
int d = (Address >> 4) & 0x7;
switch (Address & 0xf)
{
case 0x0: // 0x43x0: DMAPx
DMA[d].ReverseTransfer = (Byte & 0x80) ? TRUE : FALSE;
DMA[d].HDMAIndirectAddressing = (Byte & 0x40) ? TRUE : FALSE;
DMA[d].UnusedBit43x0 = (Byte & 0x20) ? TRUE : FALSE;
DMA[d].AAddressDecrement = (Byte & 0x10) ? TRUE : FALSE;
DMA[d].AAddressFixed = (Byte & 0x08) ? TRUE : FALSE;
DMA[d].TransferMode = (Byte & 7);
return;
case 0x1: // 0x43x1: BBADx
DMA[d].BAddress = Byte;
return;
case 0x2: // 0x43x2: A1TxL
DMA[d].AAddress &= 0xff00;
DMA[d].AAddress |= Byte;
return;
case 0x3: // 0x43x3: A1TxH
DMA[d].AAddress &= 0xff;
DMA[d].AAddress |= Byte << 8;
return;
case 0x4: // 0x43x4: A1Bx
DMA[d].ABank = Byte;
HDMAMemPointers[d] = NULL;
return;
case 0x5: // 0x43x5: DASxL
DMA[d].DMACount_Or_HDMAIndirectAddress &= 0xff00;
DMA[d].DMACount_Or_HDMAIndirectAddress |= Byte;
HDMAMemPointers[d] = NULL;
return;
case 0x6: // 0x43x6: DASxH
DMA[d].DMACount_Or_HDMAIndirectAddress &= 0xff;
DMA[d].DMACount_Or_HDMAIndirectAddress |= Byte << 8;
HDMAMemPointers[d] = NULL;
return;
case 0x7: // 0x43x7: DASBx
DMA[d].IndirectBank = Byte;
HDMAMemPointers[d] = NULL;
return;
case 0x8: // 0x43x8: A2AxL
DMA[d].Address &= 0xff00;
DMA[d].Address |= Byte;
HDMAMemPointers[d] = NULL;
return;
case 0x9: // 0x43x9: A2AxH
DMA[d].Address &= 0xff;
DMA[d].Address |= Byte << 8;
HDMAMemPointers[d] = NULL;
return;
case 0xa: // 0x43xa: NLTRx
if (Byte & 0x7f)
{
DMA[d].LineCount = Byte & 0x7f;
DMA[d].Repeat = !(Byte & 0x80);
}
else
{
DMA[d].LineCount = 128;
DMA[d].Repeat = !!(Byte & 0x80);
}
return;
case 0xb: // 0x43xb: ????x
case 0xf: // 0x43xf: mirror of 0x43xb
DMA[d].UnknownByte = Byte;
return;
default:
break;
}
}
else
{
uint16 pos;
switch (Address)
{
case 0x4200: // NMITIMEN
#ifdef DEBUGGER
if (Settings.TraceHCEvent)
S9xTraceFormattedMessage("Write to 0x4200. Byte is %2x was %2x\n", Byte, Memory.FillRAM[Address]);
#endif
if (Byte == Memory.FillRAM[0x4200])
break;
if (Byte & 0x20)
{
PPU.VTimerEnabled = TRUE;
#ifdef DEBUGGER
missing.virq = 1;
missing.virq_pos = PPU.IRQVBeamPos;
#endif
}
else
PPU.VTimerEnabled = FALSE;
if (Byte & 0x10)
{
PPU.HTimerEnabled = TRUE;
#ifdef DEBUGGER
missing.hirq = 1;
missing.hirq_pos = PPU.IRQHBeamPos;
#endif
}
else
PPU.HTimerEnabled = FALSE;
if (!(Byte & 0x10) && !(Byte & 0x20))
{
CPU.IRQLine = FALSE;
CPU.IRQTransition = FALSE;
}
if ((Byte & 0x30) != (Memory.FillRAM[0x4200] & 0x30))
{
// Only allow instantaneous IRQ if turning it completely on or off
if ((Byte & 0x30) == 0 || (Memory.FillRAM[0x4200] & 0x30) == 0)
S9xUpdateIRQPositions(true);
else
S9xUpdateIRQPositions(false);
}
// NMI can trigger immediately during VBlank as long as NMI_read ($4210) wasn't cleard.
if ((Byte & 0x80) && !(Memory.FillRAM[0x4200] & 0x80) &&
(CPU.V_Counter >= PPU.ScreenHeight + FIRST_VISIBLE_LINE) && (Memory.FillRAM[0x4210] & 0x80))
{
// FIXME: triggered at HC+=6, checked just before the final CPU cycle,
// then, when to call S9xOpcode_NMI()?
Timings.IRQFlagChanging |= IRQ_TRIGGER_NMI;
#ifdef DEBUGGER
if (Settings.TraceHCEvent)
S9xTraceFormattedMessage("NMI Triggered on low-to-high occurring at next HC=%d\n", Timings.NMITriggerPos);
#endif
}
#ifdef DEBUGGER
S9xTraceFormattedMessage("--- IRQ Timer Enable HTimer:%d Pos:%04d VTimer:%d Pos:%03d",
PPU.HTimerEnabled, PPU.HTimerPosition, PPU.VTimerEnabled, PPU.VTimerPosition);
#endif
break;
case 0x4201: // WRIO
if ((Byte & 0x80) == 0 && (Memory.FillRAM[0x4213] & 0x80) == 0x80)
S9xLatchCounters(1);
else
S9xTryGunLatch((Byte & 0x80) ? true : false);
Memory.FillRAM[0x4201] = Memory.FillRAM[0x4213] = Byte;
break;
case 0x4202: // WRMPYA
break;
case 0x4203: // WRMPYB
{
uint32 res = Memory.FillRAM[0x4202] * Byte;
// FIXME: The update occurs 8 machine cycles after $4203 is set.
Memory.FillRAM[0x4216] = (uint8) res;
Memory.FillRAM[0x4217] = (uint8) (res >> 8);
break;
}
case 0x4204: // WRDIVL
case 0x4205: // WRDIVH
break;
case 0x4206: // WRDIVB
{
uint16 a = Memory.FillRAM[0x4204] + (Memory.FillRAM[0x4205] << 8);
uint16 div = Byte ? a / Byte : 0xffff;
uint16 rem = Byte ? a % Byte : a;
// FIXME: The update occurs 16 machine cycles after $4206 is set.
Memory.FillRAM[0x4214] = (uint8) div;
Memory.FillRAM[0x4215] = div >> 8;
Memory.FillRAM[0x4216] = (uint8) rem;
Memory.FillRAM[0x4217] = rem >> 8;
break;
}
case 0x4207: // HTIMEL
pos = PPU.IRQHBeamPos;
PPU.IRQHBeamPos = (PPU.IRQHBeamPos & 0xff00) | Byte;
if (PPU.IRQHBeamPos != pos)
S9xUpdateIRQPositions(false);
#ifdef DEBUGGER
missing.hirq_pos = PPU.IRQHBeamPos;
#endif
break;
case 0x4208: // HTIMEH
pos = PPU.IRQHBeamPos;
PPU.IRQHBeamPos = (PPU.IRQHBeamPos & 0xff) | ((Byte & 1) << 8);
if (PPU.IRQHBeamPos != pos)
S9xUpdateIRQPositions(false);
#ifdef DEBUGGER
missing.hirq_pos = PPU.IRQHBeamPos;
#endif
break;
case 0x4209: // VTIMEL
pos = PPU.IRQVBeamPos;
PPU.IRQVBeamPos = (PPU.IRQVBeamPos & 0xff00) | Byte;
if (PPU.IRQVBeamPos != pos)
S9xUpdateIRQPositions(true);
#ifdef DEBUGGER
missing.virq_pos = PPU.IRQVBeamPos;
#endif
break;
case 0x420a: // VTIMEH
pos = PPU.IRQVBeamPos;
PPU.IRQVBeamPos = (PPU.IRQVBeamPos & 0xff) | ((Byte & 1) << 8);
if (PPU.IRQVBeamPos != pos)
S9xUpdateIRQPositions(true);
#ifdef DEBUGGER
missing.virq_pos = PPU.IRQVBeamPos;
#endif
break;
case 0x420b: // MDMAEN
if (CPU.InDMAorHDMA)
return;
// XXX: Not quite right...
if (Byte) {
CPU.Cycles += Timings.DMACPUSync;
}
if (Byte & 0x01)
S9xDoDMA(0);
if (Byte & 0x02)
S9xDoDMA(1);
if (Byte & 0x04)
S9xDoDMA(2);
if (Byte & 0x08)
S9xDoDMA(3);
if (Byte & 0x10)
S9xDoDMA(4);
if (Byte & 0x20)
S9xDoDMA(5);
if (Byte & 0x40)
S9xDoDMA(6);
if (Byte & 0x80)
S9xDoDMA(7);
#ifdef DEBUGGER
missing.dma_this_frame = Byte;
missing.dma_channels = Byte;
#endif
break;
case 0x420c: // HDMAEN
if (CPU.InDMAorHDMA)
return;
Memory.FillRAM[0x420c] = Byte;
// Yoshi's Island, Genjyu Ryodan, Mortal Kombat, Tales of Phantasia
PPU.HDMA = Byte & ~PPU.HDMAEnded;
#ifdef DEBUGGER
missing.hdma_this_frame |= Byte;
missing.hdma_channels |= Byte;
#endif
break;
case 0x420d: // MEMSEL
if ((Byte & 1) != (Memory.FillRAM[0x420d] & 1))
{
if (Byte & 1)
{
CPU.FastROMSpeed = ONE_CYCLE;
#ifdef DEBUGGER
missing.fast_rom = 1;
#endif
}
else
CPU.FastROMSpeed = SLOW_ONE_CYCLE;
// we might currently be in FastROMSpeed region, S9xSetPCBase will update CPU.MemSpeed
S9xSetPCBase(Registers.PBPC);
}
break;
case 0x4210: // RDNMI
case 0x4211: // TIMEUP
case 0x4212: // HVBJOY
case 0x4213: // RDIO
case 0x4214: // RDDIVL
case 0x4215: // RDDIVH
case 0x4216: // RDMPYL
case 0x4217: // RDMPYH
case 0x4218: // JOY1L
case 0x4219: // JOY1H
case 0x421a: // JOY2L
case 0x421b: // JOY2H
case 0x421c: // JOY3L
case 0x421d: // JOY3H
case 0x421e: // JOY4L
case 0x421f: // JOY4H
return;
default:
if (Settings.SPC7110 && Address >= 0x4800)
S9xSetSPC7110(Byte, Address);
else
if (Settings.SDD1 && Address >= 0x4804 && Address <= 0x4807)
S9xSetSDD1MemoryMap(Address - 0x4804, Byte & 7);
break;
}
}
Memory.FillRAM[Address] = Byte;
}
uint8 S9xGetCPU (uint16 Address)
{
if (Address < 0x4200)
{
#ifdef SNES_JOY_READ_CALLBACKS
extern bool8 pad_read;
if (Address == 0x4016 || Address == 0x4017)
{
S9xOnSNESPadRead();
pad_read = TRUE;
}
#endif
switch (Address)
{
case 0x4016: // JOYSER0
case 0x4017: // JOYSER1
return (S9xReadJOYSERn(Address));
default:
return (OpenBus);
}
}
else
if ((Address & 0xff80) == 0x4300)
{
if (CPU.InDMAorHDMA)
return (OpenBus);
int d = (Address >> 4) & 0x7;
switch (Address & 0xf)
{
case 0x0: // 0x43x0: DMAPx
return ((DMA[d].ReverseTransfer ? 0x80 : 0) |
(DMA[d].HDMAIndirectAddressing ? 0x40 : 0) |
(DMA[d].UnusedBit43x0 ? 0x20 : 0) |
(DMA[d].AAddressDecrement ? 0x10 : 0) |
(DMA[d].AAddressFixed ? 0x08 : 0) |
(DMA[d].TransferMode & 7));
case 0x1: // 0x43x1: BBADx
return (DMA[d].BAddress);
case 0x2: // 0x43x2: A1TxL
return (DMA[d].AAddress & 0xff);
case 0x3: // 0x43x3: A1TxH
return (DMA[d].AAddress >> 8);
case 0x4: // 0x43x4: A1Bx
return (DMA[d].ABank);
case 0x5: // 0x43x5: DASxL
return (DMA[d].DMACount_Or_HDMAIndirectAddress & 0xff);
case 0x6: // 0x43x6: DASxH
return (DMA[d].DMACount_Or_HDMAIndirectAddress >> 8);
case 0x7: // 0x43x7: DASBx
return (DMA[d].IndirectBank);
case 0x8: // 0x43x8: A2AxL
return (DMA[d].Address & 0xff);
case 0x9: // 0x43x9: A2AxH
return (DMA[d].Address >> 8);
case 0xa: // 0x43xa: NLTRx
return (DMA[d].LineCount ^ (DMA[d].Repeat ? 0x00 : 0x80));
case 0xb: // 0x43xb: ????x
case 0xf: // 0x43xf: mirror of 0x43xb
return (DMA[d].UnknownByte);
default:
return (OpenBus);
}
}
else
{
uint8 byte;
switch (Address)
{
case 0x4210: // RDNMI
byte = Memory.FillRAM[0x4210];
Memory.FillRAM[0x4210] = Model->_5A22;
return ((byte & 0x80) | (OpenBus & 0x70) | Model->_5A22);
case 0x4211: // TIMEUP
byte = 0;
if (CPU.IRQLine)
{
byte = 0x80;
CPU.IRQLine = FALSE;
CPU.IRQTransition = FALSE;
}
return (byte | (OpenBus & 0x7f));
case 0x4212: // HVBJOY
return (REGISTER_4212() | (OpenBus & 0x3e));
case 0x4213: // RDIO
return (Memory.FillRAM[0x4213]);
case 0x4214: // RDDIVL
case 0x4215: // RDDIVH
case 0x4216: // RDMPYL
case 0x4217: // RDMPYH
return (Memory.FillRAM[Address]);
case 0x4218: // JOY1L
case 0x4219: // JOY1H
case 0x421a: // JOY2L
case 0x421b: // JOY2H
case 0x421c: // JOY3L
case 0x421d: // JOY3H
case 0x421e: // JOY4L
case 0x421f: // JOY4H
#ifdef SNES_JOY_READ_CALLBACKS
extern bool8 pad_read;
if (Memory.FillRAM[0x4200] & 1)
{
S9xOnSNESPadRead();
pad_read = TRUE;
}
#endif
return (Memory.FillRAM[Address]);
default:
if (Settings.SPC7110 && Address >= 0x4800)
return (S9xGetSPC7110(Address));
if (Settings.SDD1 && Address >= 0x4800 && Address <= 0x4807)
return (Memory.FillRAM[Address]);
return (OpenBus);
}
}
}
void S9xResetPPU (void)
{
S9xSoftResetPPU();
S9xControlsReset();
PPU.M7HOFS = 0;
PPU.M7VOFS = 0;
PPU.M7byte = 0;
}
void S9xResetPPUFast (void)
{
PPU.RecomputeClipWindows = TRUE;
IPPU.ColorsChanged = TRUE;
IPPU.OBJChanged = TRUE;
memset(IPPU.TileCached[TILE_2BIT], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_8BIT], 0, MAX_8BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_EVEN], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_ODD], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_EVEN], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_ODD], 0, MAX_4BIT_TILES);
}
void S9xSoftResetPPU (void)
{
S9xControlsSoftReset();
PPU.VMA.High = 0;
PPU.VMA.Increment = 1;
PPU.VMA.Address = 0;
PPU.VMA.FullGraphicCount = 0;
PPU.VMA.Shift = 0;
PPU.WRAM = 0;
for (int c = 0; c < 4; c++)
{
PPU.BG[c].SCBase = 0;
PPU.BG[c].HOffset = 0;
PPU.BG[c].VOffset = 0;
PPU.BG[c].BGSize = 0;
PPU.BG[c].NameBase = 0;
PPU.BG[c].SCSize = 0;
}
PPU.BGMode = 0;
PPU.BG3Priority = 0;
PPU.CGFLIP = 0;
PPU.CGFLIPRead = 0;
PPU.CGADD = 0;
for (int c = 0; c < 256; c++)
{
IPPU.Red[c] = (c & 7) << 2;
IPPU.Green[c] = ((c >> 3) & 7) << 2;
IPPU.Blue[c] = ((c >> 6) & 2) << 3;
PPU.CGDATA[c] = IPPU.Red[c] | (IPPU.Green[c] << 5) | (IPPU.Blue[c] << 10);
}
for (int c = 0; c < 128; c++)
{
PPU.OBJ[c].HPos = 0;
PPU.OBJ[c].VPos = 0;
PPU.OBJ[c].HFlip = 0;
PPU.OBJ[c].VFlip = 0;
PPU.OBJ[c].Name = 0;
PPU.OBJ[c].Priority = 0;
PPU.OBJ[c].Palette = 0;
PPU.OBJ[c].Size = 0;
}
PPU.OBJThroughMain = FALSE;
PPU.OBJThroughSub = FALSE;
PPU.OBJAddition = FALSE;
PPU.OBJNameBase = 0;
PPU.OBJNameSelect = 0;
PPU.OBJSizeSelect = 0;
PPU.OAMAddr = 0;
PPU.SavedOAMAddr = 0;
PPU.OAMPriorityRotation = 0;
PPU.OAMFlip = 0;
PPU.OAMReadFlip = 0;
PPU.OAMTileAddress = 0;
PPU.OAMWriteRegister = 0;
memset(PPU.OAMData, 0, 512 + 32);
PPU.FirstSprite = 0;
PPU.LastSprite = 127;
PPU.RangeTimeOver = 0;
PPU.HTimerEnabled = FALSE;
PPU.VTimerEnabled = FALSE;
PPU.HTimerPosition = Timings.H_Max + 1;
PPU.VTimerPosition = Timings.V_Max + 1;
PPU.IRQHBeamPos = 0x1ff;
PPU.IRQVBeamPos = 0x1ff;
PPU.HBeamFlip = 0;
PPU.VBeamFlip = 0;
PPU.HBeamPosLatched = 0;
PPU.VBeamPosLatched = 0;
PPU.GunHLatch = 0;
PPU.GunVLatch = 1000;
PPU.HVBeamCounterLatched = 0;
PPU.Mode7HFlip = FALSE;
PPU.Mode7VFlip = FALSE;
PPU.Mode7Repeat = 0;
PPU.MatrixA = 0;
PPU.MatrixB = 0;
PPU.MatrixC = 0;
PPU.MatrixD = 0;
PPU.CentreX = 0;
PPU.CentreY = 0;
PPU.Mosaic = 0;
PPU.BGMosaic[0] = FALSE;
PPU.BGMosaic[1] = FALSE;
PPU.BGMosaic[2] = FALSE;
PPU.BGMosaic[3] = FALSE;
PPU.Window1Left = 1;
PPU.Window1Right = 0;
PPU.Window2Left = 1;
PPU.Window2Right = 0;
PPU.RecomputeClipWindows = TRUE;
for (int c = 0; c < 6; c++)
{
PPU.ClipCounts[c] = 0;
PPU.ClipWindowOverlapLogic[c] = CLIP_OR;
PPU.ClipWindow1Enable[c] = FALSE;
PPU.ClipWindow2Enable[c] = FALSE;
PPU.ClipWindow1Inside[c] = TRUE;
PPU.ClipWindow2Inside[c] = TRUE;
}
PPU.ForcedBlanking = TRUE;
PPU.FixedColourRed = 0;
PPU.FixedColourGreen = 0;
PPU.FixedColourBlue = 0;
PPU.Brightness = 0;
PPU.ScreenHeight = SNES_HEIGHT;
PPU.Need16x8Mulitply = FALSE;
PPU.BGnxOFSbyte = 0;
PPU.HDMA = 0;
PPU.HDMAEnded = 0;
PPU.OpenBus1 = 0;
PPU.OpenBus2 = 0;
for (int c = 0; c < 2; c++)
memset(&IPPU.Clip[c], 0, sizeof(struct ClipData));
IPPU.ColorsChanged = TRUE;
IPPU.OBJChanged = TRUE;
memset(IPPU.TileCached[TILE_2BIT], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_8BIT], 0, MAX_8BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_EVEN], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_ODD], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_EVEN], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_ODD], 0, MAX_4BIT_TILES);
PPU.VRAMReadBuffer = 0; // XXX: FIXME: anything better?
GFX.InterlaceFrame = 0;
GFX.DoInterlace = 0;
IPPU.Interlace = FALSE;
IPPU.InterlaceOBJ = FALSE;
IPPU.DoubleWidthPixels = FALSE;
IPPU.DoubleHeightPixels = FALSE;
IPPU.CurrentLine = 0;
IPPU.PreviousLine = 0;
IPPU.XB = NULL;
for (int c = 0; c < 256; c++)
IPPU.ScreenColors[c] = c;
IPPU.MaxBrightness = 0;
IPPU.RenderThisFrame = TRUE;
IPPU.RenderedScreenWidth = SNES_WIDTH;
IPPU.RenderedScreenHeight = SNES_HEIGHT;
IPPU.FrameCount = 0;
IPPU.RenderedFramesCount = 0;
IPPU.DisplayedRenderedFrameCount = 0;
IPPU.SkippedFrames = 0;
IPPU.FrameSkip = 0;
S9xFixColourBrightness();
S9xBuildDirectColourMaps();
for (int c = 0; c < 0x8000; c += 0x100)
memset(&Memory.FillRAM[c], c >> 8, 0x100);
memset(&Memory.FillRAM[0x2100], 0, 0x100);
memset(&Memory.FillRAM[0x4200], 0, 0x100);
memset(&Memory.FillRAM[0x4000], 0, 0x100);
// For BS Suttehakkun 2...
memset(&Memory.FillRAM[0x1000], 0, 0x1000);
Memory.FillRAM[0x4201] = Memory.FillRAM[0x4213] = 0xff;
Memory.FillRAM[0x2126] = Memory.FillRAM[0x2128] = 1;
}
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