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ppu.cpp
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ppu.cpp
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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
*
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: http://www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#include "snes9x.h"
#include "memmap.h"
#include "ppu.h"
#include "cpuexec.h"
#include "missing.h"
#include "apu.h"
#include "dma.h"
#include "gfx.h"
#include "sa1.h"
#include "sdd1.h"
#include "srtc.h"
#include "port.h"
#ifndef ZSNES_FX
#include "fxemu.h"
#include "fxinst.h"
extern struct FxInit_s SuperFX;
extern struct FxRegs_s GSU;
#else
EXTERN_C void S9xSuperFXWriteReg (uint8, uint32);
EXTERN_C uint8 S9xSuperFXReadReg (uint32);
#endif
void S9xUpdateHTimer ()
{
if (PPU.HTimerEnabled)
{
#ifdef DEBUGGER
missing.hirq_pos = PPU.IRQHBeamPos;
#endif
PPU.HTimerPosition = PPU.IRQHBeamPos * Settings.H_Max / SNES_HCOUNTER_MAX;
if (PPU.HTimerPosition == Settings.H_Max ||
PPU.HTimerPosition == Settings.HBlankStart)
{
PPU.HTimerPosition--;
}
if (!PPU.VTimerEnabled || CPU.V_Counter == PPU.IRQVBeamPos)
{
if (PPU.HTimerPosition < CPU.Cycles)
{
// Missed the IRQ on this line already
if (CPU.WhichEvent == HBLANK_END_EVENT ||
CPU.WhichEvent == HTIMER_AFTER_EVENT)
{
CPU.WhichEvent = HBLANK_END_EVENT;
CPU.NextEvent = Settings.H_Max;
}
else
{
CPU.WhichEvent = HBLANK_START_EVENT;
CPU.NextEvent = Settings.HBlankStart;
}
}
else
{
if (CPU.WhichEvent == HTIMER_BEFORE_EVENT ||
CPU.WhichEvent == HBLANK_START_EVENT)
{
if (PPU.HTimerPosition > Settings.HBlankStart)
{
// HTimer was to trigger before h-blank start,
// now triggers after start of h-blank
CPU.NextEvent = Settings.HBlankStart;
CPU.WhichEvent = HBLANK_START_EVENT;
}
else
{
CPU.NextEvent = PPU.HTimerPosition;
CPU.WhichEvent = HTIMER_BEFORE_EVENT;
}
}
else
{
CPU.WhichEvent = HTIMER_AFTER_EVENT;
CPU.NextEvent = PPU.HTimerPosition;
}
}
}
}
}
void S9xFixColourBrightness ()
{
IPPU.XB = mul_brightness [PPU.Brightness];
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]);
}
}
/**********************************************************************************************/
/* S9xSetPPU() */
/* This function sets a PPU Register to a specific byte */
/**********************************************************************************************/
void S9xSetPPU(uint8 Byte, uint16 Address)
{
if (Address <= 0x2183)
{
switch (Address)
{
case 0x2100 :
// Brightness and screen blank bit
if (Byte != Memory.FillRAM[0x2100])
{
FLUSH_REDRAW();
if (PPU.Brightness != (Byte & 0xF))
{
IPPU.ColorsChanged = TRUE;
IPPU.DirectColourMapsNeedRebuild = TRUE;
PPU.Brightness = Byte & 0xF;
S9xFixColourBrightness();
if (PPU.Brightness > IPPU.MaxBrightness)
IPPU.MaxBrightness = PPU.Brightness;
}
if ((Memory.FillRAM[0x2100] & 0x80) != (Byte & 0x80))
{
IPPU.ColorsChanged = TRUE;
PPU.ForcedBlanking = (Byte >> 7) & 1;
}
}
break;
case 0x2101 :
// Sprite (OBJ) tile address
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 :
// Sprite write address (low)
PPU.OAMAddr = Byte;
PPU.OAMFlip = 2;
PPU.OAMReadFlip = 0;
PPU.SavedOAMAddr = PPU.OAMAddr;
if (PPU.OAMPriorityRotation)
{
PPU.FirstSprite = PPU.OAMAddr & 0x7f;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
break;
case 0x2103 :
// Sprite register write address (high), sprite priority rotation
// bit.
if ((PPU.OAMPriorityRotation = (Byte & 0x80) == 0 ? 0 : 1))
{
PPU.FirstSprite = PPU.OAMAddr & 0x7f;
#ifdef DEBUGGER
missing.sprite_priority_rotation = 1;
#endif
}
// Only update the sprite write address top bit if the low byte has
// been written to first.
if (PPU.OAMFlip & 2)
{
PPU.OAMAddr &= 0x00FF;
PPU.OAMAddr |= (Byte & 1) << 8;
}
PPU.OAMFlip = 0;
PPU.OAMReadFlip = 0;
PPU.SavedOAMAddr = PPU.OAMAddr;
break;
case 0x2104 :
// Sprite register write
REGISTER_2104(Byte);
break;
case 0x2105 :
// Screen mode (0 - 7), background tile sizes and background 3
// priority
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);
#ifdef DEBUGGER
missing.modes[PPU.BGMode] = 1;
#endif
}
break;
case 0x2106 :
// Mosaic pixel size and enable
if (Byte != Memory.FillRAM[0x2106])
{
FLUSH_REDRAW();
#ifdef DEBUGGER
if ((Byte & 0xf0) && (Byte & 0x0f))
missing.mosaic = 1;
#endif
PPU.Mosaic = (Byte >> 4) + 1;
PPU.BGMosaic[0] = (Byte & 1) && PPU.Mosaic > 1;
PPU.BGMosaic[1] = (Byte & 2) && PPU.Mosaic > 1;
PPU.BGMosaic[2] = (Byte & 4) && PPU.Mosaic > 1;
PPU.BGMosaic[3] = (Byte & 8) && PPU.Mosaic > 1;
}
break;
case 0x2107 : // [BG0SC]
if (Byte != Memory.FillRAM[0x2107])
{
FLUSH_REDRAW();
PPU.BG[0].SCSize = Byte & 3;
PPU.BG[0].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x2108 : // [BG1SC]
if (Byte != Memory.FillRAM[0x2108])
{
FLUSH_REDRAW();
PPU.BG[1].SCSize = Byte & 3;
PPU.BG[1].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x2109 : // [BG2SC]
if (Byte != Memory.FillRAM[0x2109])
{
FLUSH_REDRAW();
PPU.BG[2].SCSize = Byte & 3;
PPU.BG[2].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x210A : // [BG3SC]
if (Byte != Memory.FillRAM[0x210a])
{
FLUSH_REDRAW();
PPU.BG[3].SCSize = Byte & 3;
PPU.BG[3].SCBase = (Byte & 0x7c) << 8;
}
break;
case 0x210B : // [BG01NBA]
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 : // [BG23NBA]
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 :
PPU.BG[0].HOffset =
((PPU.BG[0].HOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x210E :
PPU.BG[0].VOffset =
((PPU.BG[0].VOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x210F :
PPU.BG[1].HOffset =
((PPU.BG[1].HOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2110 :
PPU.BG[1].VOffset =
((PPU.BG[1].VOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2111 :
PPU.BG[2].HOffset =
((PPU.BG[2].HOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2112 :
PPU.BG[2].VOffset =
((PPU.BG[2].VOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2113 :
PPU.BG[3].HOffset =
((PPU.BG[3].HOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2114 :
PPU.BG[3].VOffset =
((PPU.BG[3].VOffset >> 8) & 0xff) | ((uint16) Byte << 8);
break;
case 0x2115 :
// VRAM byte/word access flag and increment
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;
}
#ifdef DEBUGGER
if ((Byte & 3) != 0)
missing.vram_inc = Byte & 3;
#endif
if (Byte & 0x0c)
{
static uint16 IncCount[4] = { 0, 32, 64, 128 };
static uint16 Shift[4] = { 0, 5, 6, 7 };
#ifdef DEBUGGER
missing.vram_full_graphic_inc =
(Byte & 0x0c) >> 2;
#endif
PPU.VMA.Increment = 1;
uint8 i = (Byte & 0x0c) >> 2;
PPU.VMA.FullGraphicCount = IncCount[i];
PPU.VMA.Mask1 = IncCount[i] * 8 - 1;
PPU.VMA.Shift = Shift[i];
}
else
PPU.VMA.FullGraphicCount = 0;
break;
case 0x2116 :
// VRAM read/write address (low)
PPU.VMA.Address &= 0xFF00;
PPU.VMA.Address |= Byte;
IPPU.FirstVRAMRead = TRUE;
break;
case 0x2117 :
// VRAM read/write address (high)
PPU.VMA.Address &= 0x00FF;
PPU.VMA.Address |= Byte << 8;
IPPU.FirstVRAMRead = TRUE;
break;
case 0x2118 :
// VRAM write data (low)
IPPU.FirstVRAMRead = TRUE;
REGISTER_2118(Byte);
break;
case 0x2119 :
// VRAM write data (high)
IPPU.FirstVRAMRead = TRUE;
REGISTER_2119(Byte);
break;
case 0x211a :
// Mode 7 outside rotation area display mode and flipping
if (Byte != Memory.FillRAM[0x211a])
{
FLUSH_REDRAW();
PPU.Mode7Repeat = Byte >> 6;
PPU.Mode7VFlip = (Byte & 2) >> 1;
PPU.Mode7HFlip = Byte & 1;
}
break;
case 0x211b :
// Mode 7 matrix A (low & high)
PPU.MatrixA = ((PPU.MatrixA >> 8) & 0xff) | (Byte << 8);
PPU.Need16x8Mulitply = TRUE;
break;
case 0x211c :
// Mode 7 matrix B (low & high)
PPU.MatrixB = ((PPU.MatrixB >> 8) & 0xff) | (Byte << 8);
PPU.Need16x8Mulitply = TRUE;
break;
case 0x211d :
// Mode 7 matrix C (low & high)
PPU.MatrixC = ((PPU.MatrixC >> 8) & 0xff) | (Byte << 8);
break;
case 0x211e :
// Mode 7 matrix D (low & high)
PPU.MatrixD = ((PPU.MatrixD >> 8) & 0xff) | (Byte << 8);
break;
case 0x211f :
// Mode 7 centre of rotation X (low & high)
PPU.CentreX = ((PPU.CentreX >> 8) & 0xff) | (Byte << 8);
break;
case 0x2120 :
// Mode 7 centre of rotation Y (low & high)
PPU.CentreY = ((PPU.CentreY >> 8) & 0xff) | (Byte << 8);
break;
case 0x2121 :
// CG-RAM address
PPU.CGFLIP = 0;
PPU.CGFLIPRead = 0;
PPU.CGADD = Byte;
break;
case 0x2122 :
REGISTER_2122(Byte);
break;
case 0x2123 :
// Window 1 and 2 enable for backgrounds 1 and 2
if (Byte != Memory.FillRAM[0x2123])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
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 :
// Window 1 and 2 enable for backgrounds 3 and 4
if (Byte != Memory.FillRAM[0x2124])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
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 :
// Window 1 and 2 enable for objects and colour window
if (Byte != Memory.FillRAM[0x2125])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
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 :
// Window 1 left position
if (Byte != Memory.FillRAM[0x2126])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
FLUSH_REDRAW();
PPU.Window1Left = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2127 :
// Window 1 right position
if (Byte != Memory.FillRAM[0x2127])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
FLUSH_REDRAW();
PPU.Window1Right = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2128 :
// Window 2 left position
if (Byte != Memory.FillRAM[0x2128])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
FLUSH_REDRAW();
PPU.Window2Left = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2129 :
// Window 2 right position
if (Byte != Memory.FillRAM[0x2129])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
FLUSH_REDRAW();
PPU.Window2Right = Byte;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212a :
// Windows 1 & 2 overlap logic for backgrounds 1 - 4
if (Byte != Memory.FillRAM[0x212a])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
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 :
// Windows 1 & 2 overlap logic for objects and colour window
if (Byte != Memory.FillRAM[0x212b])
{
if (Settings.os9x_hack&PPU_IGNORE_WINDOW) return;
FLUSH_REDRAW();
PPU.ClipWindowOverlapLogic[4] = Byte & 0x03;
PPU.ClipWindowOverlapLogic[5] = (Byte & 0x0c) >> 2;
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212c :
// Main screen designation (backgrounds 1 - 4 and objects)
if (Byte != Memory.FillRAM[0x212c])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
Memory.FillRAM[Address] = Byte;
return;
}
break;
case 0x212d :
// Sub-screen designation (backgrounds 1 - 4 and objects)
if (Byte != Memory.FillRAM[0x212d])
{
FLUSH_REDRAW();
#ifdef DEBUGGER
if (Byte & 0x1f)
missing.subscreen = 1;
#endif
PPU.RecomputeClipWindows = TRUE;
Memory.FillRAM[Address] = Byte;
return;
}
break;
case 0x212e :
// Window mask designation for main screen ?
if (Byte != Memory.FillRAM[0x212e])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x212f :
// Window mask designation for sub-screen ?
if (Byte != Memory.FillRAM[0x212f])
{
FLUSH_REDRAW();
PPU.RecomputeClipWindows = TRUE;
}
break;
case 0x2130 :
// Fixed colour addition or screen addition
if (Byte != Memory.FillRAM[0x2130])
{
if (Settings.os9x_hack&PPU_IGNORE_ADDSUB) return;
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 :
// Colour addition or subtraction select
if (Byte != Memory.FillRAM[0x2131])
{
if (Settings.os9x_hack&PPU_IGNORE_ADDSUB) return;
FLUSH_REDRAW();
// Backgrounds 1 - 4, objects and backdrop colour add/sub enable
#ifdef DEBUGGER
if (Byte & 0x80)
{
// Subtract
if (Memory.FillRAM[0x2130] & 0x02)
missing.subscreen_sub = 1;
else
missing.fixed_colour_sub = 1;
}
else
{
// Addition
if (Memory.FillRAM[0x2130] & 0x02)
missing.subscreen_add = 1;
else
missing.fixed_colour_add = 1;
}
#endif
Memory.FillRAM[0x2131] = Byte;
}
break;
case 0x2132 :
if (Byte != Memory.FillRAM[0x2132])
{
int new_fixedcol;
//FLUSH_REDRAW ();
// Colour data for fixed colour addition/subtraction
if (Byte & 0x80) {
//PPU.FixedColourBlue = Byte & 0x1f;
new_fixedcol=(Byte & 0x1f);
if (new_fixedcol!=PPU.FixedColourBlue) {if (!(Settings.os9x_hack&PPU_IGNORE_FIXEDCOLCHANGES)) FLUSH_REDRAW();PPU.FixedColourBlue=new_fixedcol;}
}
if (Byte & 0x40) {
//PPU.FixedColourGreen = Byte & 0x1f;
new_fixedcol=(Byte & 0x1f);
if (new_fixedcol!=PPU.FixedColourGreen) {if (!(Settings.os9x_hack&PPU_IGNORE_FIXEDCOLCHANGES)) FLUSH_REDRAW();PPU.FixedColourGreen=new_fixedcol;}
}
if (Byte & 0x20) {
//PPU.FixedColourRed = Byte & 0x1f;
new_fixedcol=(Byte & 0x1f);
if (new_fixedcol!=PPU.FixedColourRed) {if (!(Settings.os9x_hack&PPU_IGNORE_FIXEDCOLCHANGES)) FLUSH_REDRAW();PPU.FixedColourRed=new_fixedcol;}
}
/*FLUSH_REDRAW ();
// Colour data for fixed colour addition/subtraction
if (Byte & 0x80)
PPU.FixedColourBlue = Byte & 0x1f;
if (Byte & 0x40)
PPU.FixedColourGreen = Byte & 0x1f;
if (Byte & 0x20)
PPU.FixedColourRed = Byte & 0x1f;*/
}
break;
case 0x2133 :
// Screen settings
if (Byte != Memory.FillRAM[0x2133])
{
#ifdef DEBUGGER
if (Byte & 0x40)
missing.mode7_bgmode = 1;
if (Byte & 0x08)
missing.pseudo_512 = 1;
#endif
if (Byte & 0x04)
{
PPU.ScreenHeight = SNES_HEIGHT_EXTENDED;
#ifdef DEBUGGER
missing.lines_239 = 1;
#endif
}
else
PPU.ScreenHeight = SNES_HEIGHT;
#ifdef DEBUGGER
if (Byte & 0x02)
missing.sprite_double_height = 1;
if (Byte & 1)
missing.interlace = 1;
#endif
}
break;
case 0x2134 :
case 0x2135 :
case 0x2136 :
// Matrix 16bit x 8bit multiply result (read-only)
return;
case 0x2137 :
// Software latch for horizontal and vertical timers (read-only)
return;
case 0x2138 :
// OAM read data (read-only)
return;
case 0x2139 :
case 0x213a :
// VRAM read data (read-only)
return;
case 0x213b :
// CG-RAM read data (read-only)
return;
case 0x213c :
case 0x213d :
// Horizontal and vertical (low/high) read counter (read-only)
return;
case 0x213e :
// PPU status (time over and range over)
return;
case 0x213f :
// NTSC/PAL select and field (read-only)
return;
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
_SPCInPB(Address & 3, Byte);
#else
// CPU.Flags |= DEBUG_MODE_FLAG;
Memory.FillRAM[Address] = Byte;
IAPU.RAM[(Address & 3) + 0xf4] = Byte;
#ifdef SPC700_SHUTDOWN
CPU.APU_APUExecuting = Settings.APUEnabled;
IAPU.WaitCounter++;
#endif
#endif // SPCTOOL
break;
case 0x2180 :
REGISTER_2180(Byte);
break;
case 0x2181 :
PPU.WRAM &= 0x1FF00;
PPU.WRAM |= Byte;
break;
case 0x2182 :
PPU.WRAM &= 0x100FF;
PPU.WRAM |= Byte << 8;
break;
case 0x2183 :
PPU.WRAM &= 0x0FFFF;
PPU.WRAM |= Byte << 16;
PPU.WRAM &= 0x1FFFF;
break;
}
}
else
{
#ifdef USE_SA1
if (Settings.SA1)
{
if (Address >= 0x2200 && Address < 0x23ff)
S9xSetSA1(Byte, Address);
else
Memory.FillRAM[Address] = Byte;
return;
}
else
#endif
// Dai Kaijyu Monogatari II
if (Address == 0x2801 && Settings.SRTC)
S9xSetSRTC(Byte, Address);
else if (Address < 0x3000 || Address >= 0x3000 + 768)
{
#ifdef DEBUGGER
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
}
else
{
if (!Settings.SuperFX)
return;
switch (Address)
{
case 0x3030 :
if ((Memory.FillRAM[0x3030] ^ Byte) & FLG_G)
{
Memory.FillRAM[Address] = Byte;
// Go flag has been changed
if (Byte & FLG_G)
S9xSuperFXExec();
else
FxFlushCache();
}
else
Memory.FillRAM[Address] = Byte;
break;
case 0x3031 :
Memory.FillRAM[Address] = Byte;
break;
case 0x3033 :
Memory.FillRAM[Address] = Byte;
break;
case 0x3034 :
Memory.FillRAM[Address] = Byte & 0x7f;
break;
case 0x3036 :
Memory.FillRAM[Address] = Byte & 0x7f;
break;
case 0x3037 :
Memory.FillRAM[Address] = Byte;
break;
case 0x3038 :
Memory.FillRAM[Address] = Byte;
break;
case 0x3039 :
Memory.FillRAM[Address] = Byte;
break;
case 0x303a :
Memory.FillRAM[Address] = Byte;
break;
case 0x303b :
break;
case 0x303f :
Memory.FillRAM[Address] = Byte;
break;
case 0x301f :
Memory.FillRAM[Address] = Byte;
Memory.FillRAM[0x3000 + GSU_SFR] |= FLG_G;
S9xSuperFXExec();
return;
default :
Memory.FillRAM[Address] = Byte;
if (Address >= 0x3100)
{
FxCacheWriteAccess(Address);
}
break;
}
return;
}
}
Memory.FillRAM[Address] = Byte;
}
/**********************************************************************************************/
/* S9xGetPPU() */
/* This function retrieves a PPU Register */
/**********************************************************************************************/
uint8 S9xGetPPU(uint16 Address)
{
uint8 byte = 0;