From 6fb0c7a7a53e1eba7a0f5dc5b1ade312a0d76119 Mon Sep 17 00:00:00 2001 From: Toad King Date: Thu, 14 Jun 2012 03:21:06 -0400 Subject: initial pocketsnes commit --- src/ppu.cpp | 1418 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1418 insertions(+) create mode 100644 src/ppu.cpp (limited to 'src/ppu.cpp') diff --git a/src/ppu.cpp b/src/ppu.cpp new file mode 100644 index 0000000..19340fb --- /dev/null +++ b/src/ppu.cpp @@ -0,0 +1,1418 @@ +/* + * 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 "display.h" +#include "sa1.h" +#ifndef _SNESPPC +//#include "netplay.h" +#endif +#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 +extern uint8 *HDMAMemPointers [8]; + +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]; +#ifndef _SNESPPC + if (Settings.SixteenBit) +#endif + { + for (unsigned 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.XB[IPPU.Red [i]], IPPU.XB[IPPU.Green [i]], IPPU.XB[IPPU.Blue [i]]); + } + } +} + +/**********************************************************************************************/ +/* S9xSetPPU() */ +/* This function sets a PPU Register to a specific byte */ +/**********************************************************************************************/ +#include "ppu_setppu.h" + +/**********************************************************************************************/ +/* S9xGetPPU() */ +/* This function retrieves a PPU Register */ +/**********************************************************************************************/ +#include "ppu_getppu.h" + +/**********************************************************************************************/ +/* S9xSetCPU() */ +/* This function sets a CPU/DMA Register to a specific byte */ +/**********************************************************************************************/ +void S9xSetCPU(uint8 byte, uint16 Address) +{ + int d; + + if (Address < 0x4200) + { +#ifdef VAR_CYCLES + CPU.Cycles += ONE_CYCLE; +#endif + switch (Address) + { + case 0x4016 : + // S9xReset reading of old-style joypads + if ((byte & 1) && !(Memory.FillRAM[Address] & 1)) + { + PPU.Joypad1ButtonReadPos = 0; + PPU.Joypad2ButtonReadPos = 0; + PPU.Joypad3ButtonReadPos = 0; + } + break; + case 0x4017 : + break; + default : +#ifdef DEBUGGER + missing.unknowncpu_write = Address; + if (Settings.TraceUnknownRegisters) + { + sprintf(String, "Unknown register register write: $%02X->$%04X\n", byte, Address); + S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String); + } +#endif + break; + } + } + else + switch (Address) + { + case 0x4200 : + // NMI, V & H IRQ and joypad reading enable flags + if (byte & 0x20) + { + if (!PPU.VTimerEnabled) + { +#ifdef DEBUGGER + missing.virq = 1; + missing.virq_pos = PPU.IRQVBeamPos; +#endif + PPU.VTimerEnabled = TRUE; + if (PPU.HTimerEnabled) + S9xUpdateHTimer(); + else if (PPU.IRQVBeamPos == CPU.V_Counter) + S9xSetIRQ(PPU_V_BEAM_IRQ_SOURCE); + } + } + else + { + PPU.VTimerEnabled = FALSE; + } + + if (byte & 0x10) + { + if (!PPU.HTimerEnabled) + { +#ifdef DEBUGGER + missing.hirq = 1; + missing.hirq_pos = PPU.IRQHBeamPos; +#endif + PPU.HTimerEnabled = TRUE; + S9xUpdateHTimer(); + } + } + else + { + // No need to check for HTimer being disabled as the scanline + // event trigger code won't trigger an H-IRQ unless its enabled. + PPU.HTimerEnabled = FALSE; + PPU.HTimerPosition = Settings.H_Max + 1; + } + +#ifndef RC_OPTIMIZED + if (!Settings.DaffyDuck) + CLEAR_IRQ_SOURCE(PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE); + + if ((byte & 0x80) + && !(Memory.FillRAM[0x4200] & 0x80) + && CPU.V_Counter >= PPU.ScreenHeight + FIRST_VISIBLE_LINE + && CPU.V_Counter <= PPU.ScreenHeight + (SNESGameFixes.alienVSpredetorFix ? 25 : 15) + && //jyam 15->25 alien vs predetor + // Panic Bomberman clears the NMI pending flag @ scanline 230 before enabling + // NMIs again. The NMI routine crashes the CPU if it is called without the NMI + // pending flag being set... + (Memory.FillRAM[0x4210] & 0x80) && !CPU.NMIActive) + { + CPU.Flags |= NMI_FLAG; + CPU.NMIActive = TRUE; + CPU.NMICycleCount = CPU.NMITriggerPoint; + } +#endif + break; + case 0x4201 : + // I/O port output + case 0x4202 : + // Multiplier (for multply) + break; + case 0x4203 : + { + // Multiplicand + uint32 res = Memory.FillRAM[0x4202] * byte; + + Memory.FillRAM[0x4216] = (uint8) res; + Memory.FillRAM[0x4217] = (uint8) (res >> 8); + break; + } + case 0x4204 : + case 0x4205 : + // Low and high muliplier (for divide) + break; + case 0x4206 : + { + // Divisor + uint16 a = + Memory.FillRAM[0x4204] + (Memory.FillRAM[0x4205] << 8); + uint16 div = byte ? a / byte : 0xffff; + uint16 rem = byte ? a % byte : a; + + Memory.FillRAM[0x4214] = (uint8) div; + Memory.FillRAM[0x4215] = div >> 8; + Memory.FillRAM[0x4216] = (uint8) rem; + Memory.FillRAM[0x4217] = rem >> 8; + break; + } + case 0x4207 : + d = PPU.IRQHBeamPos; + PPU.IRQHBeamPos = (PPU.IRQHBeamPos & 0xFF00) | byte; + + if (PPU.HTimerEnabled && PPU.IRQHBeamPos != d) + S9xUpdateHTimer(); + break; + + case 0x4208 : + d = PPU.IRQHBeamPos; + PPU.IRQHBeamPos = (PPU.IRQHBeamPos & 0xFF) | ((byte & 1) << 8); + + if (PPU.HTimerEnabled && PPU.IRQHBeamPos != d) + S9xUpdateHTimer(); + + break; + + case 0x4209 : + d = PPU.IRQVBeamPos; + PPU.IRQVBeamPos = (PPU.IRQVBeamPos & 0xFF00) | byte; +#ifdef DEBUGGER + missing.virq_pos = PPU.IRQVBeamPos; +#endif + if (PPU.VTimerEnabled && PPU.IRQVBeamPos != d) + { + if (PPU.HTimerEnabled) + S9xUpdateHTimer(); + else + { + if (PPU.IRQVBeamPos == CPU.V_Counter) + S9xSetIRQ(PPU_V_BEAM_IRQ_SOURCE); + } + } + break; + + case 0x420A : + d = PPU.IRQVBeamPos; + PPU.IRQVBeamPos = (PPU.IRQVBeamPos & 0xFF) | ((byte & 1) << 8); +#ifdef DEBUGGER + missing.virq_pos = PPU.IRQVBeamPos; +#endif + if (PPU.VTimerEnabled && PPU.IRQVBeamPos != d) + { + if (PPU.HTimerEnabled) + S9xUpdateHTimer(); + else + { + if (PPU.IRQVBeamPos == CPU.V_Counter) + S9xSetIRQ(PPU_V_BEAM_IRQ_SOURCE); + } + } + break; + + case 0x420B : +#ifdef DEBUGGER + missing.dma_this_frame = byte; + missing.dma_channels = byte; +#endif + if ((byte & 0x01) != 0) + S9xDoDMA(0); + if ((byte & 0x02) != 0) + S9xDoDMA(1); + if ((byte & 0x04) != 0) + S9xDoDMA(2); + if ((byte & 0x08) != 0) + S9xDoDMA(3); + if ((byte & 0x10) != 0) + S9xDoDMA(4); + if ((byte & 0x20) != 0) + S9xDoDMA(5); + if ((byte & 0x40) != 0) + S9xDoDMA(6); + if ((byte & 0x80) != 0) + S9xDoDMA(7); + break; + case 0x420C : +#ifdef DEBUGGER + missing.hdma_this_frame |= byte; + missing.hdma_channels |= byte; +#endif + //if (Settings.DisableHDMA) + // byte = 0; + Memory.FillRAM[0x420c] = byte; + IPPU.HDMA = byte; + break; + + case 0x420d : + // Cycle speed 0 - 2.68Mhz, 1 - 3.58Mhz (banks 0x80 +) + 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; + + Memory.FixROMSpeed(); + } + /* FALL */ + case 0x420e : + case 0x420f : + // --->>> Unknown + break; + case 0x4210 : + // NMI ocurred flag (reset on read or write) + Memory.FillRAM[0x4210] = 0; + return; + case 0x4211 : + // IRQ ocurred flag (reset on read or write) + CLEAR_IRQ_SOURCE(PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE); + break; + case 0x4212 : + // v-blank, h-blank and joypad being scanned flags (read-only) + case 0x4213 : + // I/O Port (read-only) + case 0x4214 : + case 0x4215 : + // Quotent of divide (read-only) + case 0x4216 : + case 0x4217 : + // Multiply product (read-only) + return; + case 0x4218 : + case 0x4219 : + case 0x421a : + case 0x421b : + case 0x421c : + case 0x421d : + case 0x421e : + case 0x421f : + // Joypad values (read-only) + return; + + case 0x4300 : + case 0x4310 : + case 0x4320 : + case 0x4330 : + case 0x4340 : + case 0x4350 : + case 0x4360 : + case 0x4370 : + d = (Address >> 4) & 0x7; + DMA[d].TransferDirection = (byte & 128) != 0 ? 1 : 0; + DMA[d].HDMAIndirectAddressing = (byte & 64) != 0 ? 1 : 0; + DMA[d].AAddressDecrement = (byte & 16) != 0 ? 1 : 0; + DMA[d].AAddressFixed = (byte & 8) != 0 ? 1 : 0; + DMA[d].TransferMode = (byte & 7); + break; + + case 0x4301 : + case 0x4311 : + case 0x4321 : + case 0x4331 : + case 0x4341 : + case 0x4351 : + case 0x4361 : + case 0x4371 : + DMA[((Address >> 4) & 0x7)].BAddress = byte; + break; + + case 0x4302 : + case 0x4312 : + case 0x4322 : + case 0x4332 : + case 0x4342 : + case 0x4352 : + case 0x4362 : + case 0x4372 : + d = (Address >> 4) & 0x7; + DMA[d].AAddress &= 0xFF00; + DMA[d].AAddress |= byte; + break; + + case 0x4303 : + case 0x4313 : + case 0x4323 : + case 0x4333 : + case 0x4343 : + case 0x4353 : + case 0x4363 : + case 0x4373 : + d = (Address >> 4) & 0x7; + DMA[d].AAddress &= 0xFF; + DMA[d].AAddress |= byte << 8; + break; + + case 0x4304 : + case 0x4314 : + case 0x4324 : + case 0x4334 : + case 0x4344 : + case 0x4354 : + case 0x4364 : + case 0x4374 : + DMA[((Address >> 4) & 0x7)].ABank = byte; + HDMAMemPointers[((Address >> 4) & 0x7)]=NULL; + break; + + case 0x4305 : + case 0x4315 : + case 0x4325 : + case 0x4335 : + case 0x4345 : + case 0x4355 : + case 0x4365 : + case 0x4375 : + d = (Address >> 4) & 0x7; + DMA[d].TransferBytes &= 0xFF00; + DMA[d].TransferBytes |= byte; + DMA[d].IndirectAddress &= 0xff00; + DMA[d].IndirectAddress |= byte; + HDMAMemPointers[d]=NULL; + break; + + case 0x4306 : + case 0x4316 : + case 0x4326 : + case 0x4336 : + case 0x4346 : + case 0x4356 : + case 0x4366 : + case 0x4376 : + d = (Address >> 4) & 0x7; + DMA[d].TransferBytes &= 0xFF; + DMA[d].TransferBytes |= byte << 8; + DMA[d].IndirectAddress &= 0xff; + DMA[d].IndirectAddress |= byte << 8; + HDMAMemPointers[d]=NULL; + break; + + case 0x4307 : + case 0x4317 : + case 0x4327 : + case 0x4337 : + case 0x4347 : + case 0x4357 : + case 0x4367 : + case 0x4377 : + DMA[d = ((Address >> 4) & 0x7)].IndirectBank = byte; + HDMAMemPointers[d]=NULL; + break; + + case 0x4308 : + case 0x4318 : + case 0x4328 : + case 0x4338 : + case 0x4348 : + case 0x4358 : + case 0x4368 : + case 0x4378 : + d = (Address >> 4) & 7; + DMA[d].Address &= 0xff00; + DMA[d].Address |= byte; + HDMAMemPointers[d] = NULL; + break; + + case 0x4309 : + case 0x4319 : + case 0x4329 : + case 0x4339 : + case 0x4349 : + case 0x4359 : + case 0x4369 : + case 0x4379 : + d = (Address >> 4) & 0x7; + DMA[d].Address &= 0xff; + DMA[d].Address |= byte << 8; + HDMAMemPointers[d] = NULL; + break; + + case 0x430A : + case 0x431A : + case 0x432A : + case 0x433A : + case 0x434A : + case 0x435A : + case 0x436A : + case 0x437A : + d = (Address >> 4) & 0x7; + DMA[d].LineCount = byte & 0x7f; + DMA[d].Repeat = !(byte & 0x80); + break; + + case 0x430F: + case 0x431F: + case 0x432F: + case 0x433F: + case 0x434F: + case 0x435F: + case 0x436F: + case 0x437F: + Address &= ~4; // Convert 43xF to 43xB + /* fall through */ + case 0x430B: + case 0x431B: + case 0x432B: + case 0x433B: + case 0x434B: + case 0x435B: + case 0x436B: + case 0x437B: + + // Unknown, but they seem to be RAM-ish + break; + case 0x4800 : + case 0x4801 : + case 0x4802 : + case 0x4803 : + //printf ("%02x->%04x\n", byte, Address); + break; + + case 0x4804 : + case 0x4805 : + case 0x4806 : + case 0x4807 : + //printf ("%02x->%04x\n", byte, Address); + + S9xSetSDD1MemoryMap(Address - 0x4804, byte & 7); + break; + default : +#ifdef DEBUGGER + missing.unknowncpu_write = Address; + if (Settings.TraceUnknownRegisters) + { + sprintf( + String, + "Unknown register write: $%02X->$%04X\n", + byte, + Address); + S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String); + } +#endif + break; + } + Memory.FillRAM[Address] = byte; +} + +/**********************************************************************************************/ +/* S9xGetCPU() */ +/* This function retrieves a CPU/DMA Register */ +/**********************************************************************************************/ +uint8 S9xGetCPU(uint16 Address) +{ + uint8 byte; + if(Address>=0x4800&&Address<=0x4807&&Settings.SDD1) + { + return Memory.FillRAM[Address]; + } + + if (Address < 0x4200) + { +#ifdef VAR_CYCLES + CPU.Cycles += ONE_CYCLE; +#endif + switch (Address) + { + // Secret of the Evermore + case 0x4000 : + case 0x4001 : + return (0x40); + + case 0x4016 : + { + if (Memory.FillRAM[0x4016] & 1) + { + return (0); + } + + byte = IPPU.Joypads[0] >> (PPU.Joypad1ButtonReadPos ^ 15); + PPU.Joypad1ButtonReadPos++; + return (byte & 1); + } + case 0x4017 : + { + if (Memory.FillRAM[0x4016] & 1) + { + // MultiPlayer5 adaptor is only allowed to be plugged into port 2 + switch (IPPU.Controller) + { + case SNES_MULTIPLAYER5 : + return (2); + + case SNES_MOUSE : + if (++PPU.MouseSpeed[0] > 2) + PPU.MouseSpeed[0] = 0; + break; + } + return (0x00); + } + + if (IPPU.Controller == SNES_MULTIPLAYER5) + { + if (Memory.FillRAM[0x4201] & 0x80) + { + byte = + ((IPPU.Joypads[0] + >> (PPU.Joypad2ButtonReadPos ^ 15)) + & 1) + | (((IPPU.Joypads[2] + >> (PPU.Joypad2ButtonReadPos ^ 15)) + & 1) + << 1); + PPU.Joypad2ButtonReadPos++; + return (byte); + } + else + { + byte = + ((IPPU.Joypads[3] + >> (PPU.Joypad3ButtonReadPos ^ 15)) + & 1) + | (((IPPU.Joypads[4] + >> (PPU.Joypad3ButtonReadPos ^ 15)) + & 1) + << 1); + PPU.Joypad3ButtonReadPos++; + return (byte); + } + } + return ( + (IPPU.Joypads[0] + >> (PPU.Joypad2ButtonReadPos++ ^ 15)) + & 1); + } + default : +#ifdef DEBUGGER + missing.unknowncpu_read = Address; + if (Settings.TraceUnknownRegisters) + { + sprintf(String, "Unknown register read: $%04X\n", Address); + S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String); + } +#endif + break; + } + return (Memory.FillRAM[Address]); + } + else + switch (Address) + { + // BS Dynami Tracer! needs to be able to check if NMIs are enabled + // already, otherwise the game locks up. + case 0x4200 : + // NMI, h & v timers and joypad reading enable + if (SNESGameFixes.Old_Read0x4200) + { +#ifdef CPU_SHUTDOWN + CPU.WaitAddress = CPU.PCAtOpcodeStart; +#endif + return (REGISTER_4212()); + } + case 0x4201 : + // I/O port (output - write only?) + case 0x4202 : + case 0x4203 : + // Multiplier and multiplicand (write) + case 0x4204 : + case 0x4205 : + case 0x4206 : + // Divisor and dividend (write) + return (Memory.FillRAM[Address]); + case 0x4207 : + return (uint8) (PPU.IRQHBeamPos); + case 0x4208 : + return (PPU.IRQHBeamPos >> 8); + case 0x4209 : + return (uint8) (PPU.IRQVBeamPos); + case 0x420a : + return (PPU.IRQVBeamPos >> 8); + case 0x420b : + // General purpose DMA enable + // Super Formation Soccer 95 della Serie A UCC Xaqua requires this + // register should not always return zero. + // .. But Aero 2 waits until this register goes zero.. + // Just keep toggling the value for now in the hope that it breaks + // the game out of its wait loop... + Memory.FillRAM[0x420b] = !Memory.FillRAM[0x420b]; + return (Memory.FillRAM[0x420b]); + case 0x420c : + // H-DMA enable + return (IPPU.HDMA); + case 0x420d : + // Cycle speed 0 - 2.68Mhz, 1 - 3.58Mhz (banks 0x80 +) + return (Memory.FillRAM[Address]); + case 0x420e : + case 0x420f : + // --->>> Unknown + return (Memory.FillRAM[Address]); + case 0x4210 : +#ifdef CPU_SHUTDOWN + CPU.WaitAddress = CPU.PCAtOpcodeStart; +#endif + byte = Memory.FillRAM[0x4210]; + Memory.FillRAM[0x4210] = 0; + return (byte); + case 0x4211 : + byte = + (CPU.IRQActive + & (PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE)) + ? 0x80 + : 0; + // Super Robot Wars Ex ROM bug requires this. + byte |= CPU.Cycles >= Settings.HBlankStart ? 0x40 : 0; + CLEAR_IRQ_SOURCE(PPU_V_BEAM_IRQ_SOURCE | PPU_H_BEAM_IRQ_SOURCE); + return (byte); + case 0x4212 : + // V-blank, h-blank and joypads being read flags (read-only) +#ifdef CPU_SHUTDOWN + CPU.WaitAddress = CPU.PCAtOpcodeStart; +#endif + return (REGISTER_4212()); + case 0x4213 : + // I/O port input + case 0x4214 : + case 0x4215 : + // Quotient of divide result + case 0x4216 : + case 0x4217 : + // Multiplcation result (for multiply) or remainder of + // divison. + return (Memory.FillRAM[Address]); + case 0x4218 : + case 0x4219 : + case 0x421a : + case 0x421b : + case 0x421c : + case 0x421d : + case 0x421e : + case 0x421f : + // Joypads 1-4 button and direction state. + return (Memory.FillRAM[Address]); + + case 0x4300 : + case 0x4310 : + case 0x4320 : + case 0x4330 : + case 0x4340 : + case 0x4350 : + case 0x4360 : + case 0x4370 : + // DMA direction, address type, fixed flag, + return (Memory.FillRAM[Address]); + + case 0x4301 : + case 0x4311 : + case 0x4321 : + case 0x4331 : + case 0x4341 : + case 0x4351 : + case 0x4361 : + case 0x4371 : + return (Memory.FillRAM[Address]); + + case 0x4302 : + case 0x4312 : + case 0x4322 : + case 0x4332 : + case 0x4342 : + case 0x4352 : + case 0x4362 : + case 0x4372 : + return (Memory.FillRAM[Address]); + + case 0x4303 : + case 0x4313 : + case 0x4323 : + case 0x4333 : + case 0x4343 : + case 0x4353 : + case 0x4363 : + case 0x4373 : + return (Memory.FillRAM[Address]); + + case 0x4304 : + case 0x4314 : + case 0x4324 : + case 0x4334 : + case 0x4344 : + case 0x4354 : + case 0x4364 : + case 0x4374 : + return (Memory.FillRAM[Address]); + + case 0x4305 : + case 0x4315 : + case 0x4325 : + case 0x4335 : + case 0x4345 : + case 0x4355 : + case 0x4365 : + case 0x4375 : + return (Memory.FillRAM[Address]); + + case 0x4306 : + case 0x4316 : + case 0x4326 : + case 0x4336 : + case 0x4346 : + case 0x4356 : + case 0x4366 : + case 0x4376 : + return (Memory.FillRAM[Address]); + + case 0x4307 : + case 0x4317 : + case 0x4327 : + case 0x4337 : + case 0x4347 : + case 0x4357 : + case 0x4367 : + case 0x4377 : + return (DMA[(Address >> 4) & 7].IndirectBank); + + case 0x4308 : + case 0x4318 : + case 0x4328 : + case 0x4338 : + case 0x4348 : + case 0x4358 : + case 0x4368 : + case 0x4378 : + return (Memory.FillRAM[Address]); + + case 0x4309 : + case 0x4319 : + case 0x4329 : + case 0x4339 : + case 0x4349 : + case 0x4359 : + case 0x4369 : + case 0x4379 : + return (Memory.FillRAM[Address]); + + case 0x430A : + case 0x431A : + case 0x432A : + case 0x433A : + case 0x434A : + case 0x435A : + case 0x436A : + case 0x437A : + { + int d = (Address & 0x70) >> 4; + if (IPPU.HDMA & (1 << d)) + { + return (DMA[d].LineCount); + } + return (Memory.FillRAM[Address]); + } + case 0x430F: + case 0x431F: + case 0x432F: + case 0x433F: + case 0x434F: + case 0x435F: + case 0x436F: + case 0x437F: + Address &= ~4; // Convert 43xF to 43xB + /* fall through */ + case 0x430B: + case 0x431B: + case 0x432B: + case 0x433B: + case 0x434B: + case 0x435B: + case 0x436B: + case 0x437B: + + // Unknown, but they seem to be RAM-ish + return (Memory.FillRAM[Address]); + default : +#ifdef DEBUGGER + missing.unknowncpu_read = Address; + if (Settings.TraceUnknownRegisters) + { + sprintf(String, "Unknown register read: $%04X\n", Address); + S9xMessage(S9X_TRACE, S9X_PPU_TRACE, String); + } + +#endif + break; + } + return (Memory.FillRAM[Address]); +} + +void S9xResetPPU() +{ + PPU.BGMode = 0; + PPU.BG3Priority = 0; + PPU.Brightness = 0; + PPU.VMA.High = 0; + PPU.VMA.Increment = 1; + PPU.VMA.Address = 0; + PPU.VMA.FullGraphicCount = 0; + PPU.VMA.Shift = 0; + + for (uint8 B = 0; B != 4; B++) + { + PPU.BG[B].SCBase = 0; + PPU.BG[B].VOffset = 0; + PPU.BG[B].HOffset = 0; + PPU.BG[B].BGSize = 0; + PPU.BG[B].NameBase = 0; + PPU.BG[B].SCSize = 0; + + PPU.ClipCounts[B] = 0; + PPU.ClipWindowOverlapLogic[B] = CLIP_OR; + PPU.ClipWindow1Enable[B] = FALSE; + PPU.ClipWindow2Enable[B] = FALSE; + PPU.ClipWindow1Inside[B] = TRUE; + PPU.ClipWindow2Inside[B] = TRUE; + } + + PPU.ClipCounts[4] = 0; + PPU.ClipCounts[5] = 0; + PPU.ClipWindowOverlapLogic[4] = PPU.ClipWindowOverlapLogic[5] = CLIP_OR; + PPU.ClipWindow1Enable[4] = PPU.ClipWindow1Enable[5] = FALSE; + PPU.ClipWindow2Enable[4] = PPU.ClipWindow2Enable[5] = FALSE; + PPU.ClipWindow1Inside[4] = PPU.ClipWindow1Inside[5] = TRUE; + PPU.ClipWindow2Inside[4] = PPU.ClipWindow2Inside[5] = TRUE; + + PPU.CGFLIP = 0; + unsigned int c; + for (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); + } + + PPU.FirstSprite = 0; + PPU.LastSprite = 127; + for (int Sprite = 0; Sprite < 128; Sprite++) + { + PPU.OBJ[Sprite].HPos = 0; + PPU.OBJ[Sprite].VPos = 0; + PPU.OBJ[Sprite].VFlip = 0; + PPU.OBJ[Sprite].HFlip = 0; + PPU.OBJ[Sprite].Priority = 0; + PPU.OBJ[Sprite].Palette = 0; + PPU.OBJ[Sprite].Name = 0; + PPU.OBJ[Sprite].Size = 0; + } + PPU.OAMPriorityRotation = 0; + PPU.OAMWriteRegister = 0; + + PPU.OAMFlip = 0; + PPU.OAMTileAddress = 0; + PPU.OAMAddr = 0; + PPU.IRQVBeamPos = 0; + PPU.IRQHBeamPos = 0; + PPU.VBeamPosLatched = 0; + PPU.HBeamPosLatched = 0; + + PPU.HBeamFlip = 0; + PPU.VBeamFlip = 0; + PPU.HVBeamCounterLatched = 0; + + PPU.MatrixA = PPU.MatrixB = PPU.MatrixC = PPU.MatrixD = 0; + PPU.CentreX = PPU.CentreY = 0; + PPU.Joypad1ButtonReadPos = 0; + PPU.Joypad2ButtonReadPos = 0; + PPU.Joypad3ButtonReadPos = 0; + + PPU.CGADD = 0; + PPU.FixedColourRed = PPU.FixedColourGreen = PPU.FixedColourBlue = 0; + PPU.SavedOAMAddr = 0; + PPU.SavedOAMAddr2 = 0; + PPU.ScreenHeight = SNES_HEIGHT; + PPU.WRAM = 0; + PPU.BG_Forced = 0; + PPU.ForcedBlanking = TRUE; + PPU.OBJThroughMain = FALSE; + PPU.OBJThroughSub = FALSE; + PPU.OBJSizeSelect = 0; + PPU.OBJNameSelect = 0; + PPU.OBJNameBase = 0; + PPU.OBJAddition = FALSE; + PPU.OAMReadFlip = 0; + PPU.BGnxOFSbyte = 0; + ZeroMemory(PPU.OAMData, 512 + 32); + + PPU.VTimerEnabled = FALSE; + PPU.HTimerEnabled = FALSE; + PPU.HTimerPosition = Settings.H_Max + 1; + PPU.Mosaic = 0; + PPU.BGMosaic[0] = PPU.BGMosaic[1] = FALSE; + PPU.BGMosaic[2] = PPU.BGMosaic[3] = FALSE; + PPU.Mode7HFlip = FALSE; + PPU.Mode7VFlip = FALSE; + PPU.Mode7Repeat = 0; + PPU.Window1Left = 1; + PPU.Window1Right = 0; + PPU.Window2Left = 1; + PPU.Window2Right = 0; + PPU.RecomputeClipWindows = TRUE; + PPU.CGFLIPRead = 0; + PPU.Need16x8Mulitply = FALSE; + PPU.MouseSpeed[0] = PPU.MouseSpeed[1] = 0; + + IPPU.ColorsChanged = TRUE; + IPPU.HDMA = 0; + IPPU.HDMAStarted = FALSE; + IPPU.MaxBrightness = 0; + IPPU.LatchedBlanking = 0; + IPPU.OBJChanged = TRUE; + IPPU.RenderThisFrame = TRUE; + IPPU.DirectColourMapsNeedRebuild = TRUE; + IPPU.FrameCount = 0; + IPPU.RenderedFramesCount = 0; + IPPU.DisplayedRenderedFrameCount = 0; + IPPU.SkippedFrames = 0; + IPPU.FrameSkip = 0; + ZeroMemory(IPPU.TileCached[TILE_2BIT], MAX_2BIT_TILES); + ZeroMemory(IPPU.TileCached[TILE_4BIT], MAX_4BIT_TILES); + ZeroMemory(IPPU.TileCached[TILE_8BIT], MAX_8BIT_TILES); + IPPU.FirstVRAMRead = FALSE; + IPPU.LatchedInterlace = FALSE; + IPPU.DoubleWidthPixels = FALSE; + IPPU.RenderedScreenWidth = SNES_WIDTH; + IPPU.RenderedScreenHeight = SNES_HEIGHT; + IPPU.XB = NULL; + for (c = 0; c < 256; c++) + IPPU.ScreenColors[c] = c; + S9xFixColourBrightness(); + IPPU.PreviousLine = IPPU.CurrentLine = 0; + IPPU.Joypads[0] = IPPU.Joypads[1] = IPPU.Joypads[2] = 0; + IPPU.Joypads[3] = IPPU.Joypads[4] = 0; + IPPU.SuperScope = 0; + IPPU.Mouse[0] = IPPU.Mouse[1] = 0; + IPPU.PrevMouseX[0] = IPPU.PrevMouseX[1] = 256 / 2; + IPPU.PrevMouseY[0] = IPPU.PrevMouseY[1] = 224 / 2; + + if (Settings.ControllerOption == 0) + IPPU.Controller = SNES_MAX_CONTROLLER_OPTIONS - 1; + else + IPPU.Controller = Settings.ControllerOption - 1; + S9xNextController(); + + for (c = 0; c < 2; c++) + memset(& IPPU.Clip[c], 0, sizeof(struct ClipData)); + + if (Settings.MouseMaster) + { + S9xProcessMouse(0); + S9xProcessMouse(1); + } + for (c = 0; c < 0x8000; c += 0x100) + memset(& Memory.FillRAM[c], c >> 8, 0x100); + + ZeroMemory(& Memory.FillRAM[0x2100], 0x100); + ZeroMemory(& Memory.FillRAM[0x4200], 0x100); + ZeroMemory(& Memory.FillRAM[0x4000], 0x100); + // For BS Suttehakkun 2... + ZeroMemory(& Memory.FillRAM[0x1000], 0x1000); + Memory.FillRAM[0x4201]=Memory.FillRAM[0x4213]=0xFF; + + PPU.BG[0].OffsetsChanged = 0; + PPU.BG[1].OffsetsChanged = 0; + PPU.BG[2].OffsetsChanged = 0; + PPU.BG[3].OffsetsChanged = 0; + ROpCount = 0; + ZeroMemory(&rops, MAX_ROPS); + GFX.r212c_s = 0; + GFX.r212d_s = 0; + GFX.r212e_s = 0; + GFX.r212f_s = 0; + GFX.r2130_s = 0; + GFX.r2131_s = 0; +} + +void S9xProcessMouse(int which1) +{ + int x, y; + uint32 buttons; + + if ((IPPU.Controller == SNES_MOUSE + || IPPU.Controller == SNES_MOUSE_SWAPPED) + && S9xReadMousePosition(which1, x, y, buttons)) + { + int delta_x, delta_y; +#define MOUSE_SIGNATURE 0x1 + IPPU.Mouse[which1] = + MOUSE_SIGNATURE + | (PPU.MouseSpeed[which1] << 4) + | ((buttons & 1) << 6) + | ((buttons & 2) << 6); + + delta_x = x - IPPU.PrevMouseX[which1]; + delta_y = y - IPPU.PrevMouseY[which1]; + + if (delta_x > 63) + { + delta_x = 63; + IPPU.PrevMouseX[which1] += 63; + } + else if (delta_x < -63) + { + delta_x = -63; + IPPU.PrevMouseX[which1] -= 63; + } + else + IPPU.PrevMouseX[which1] = x; + + if (delta_y > 63) + { + delta_y = 63; + IPPU.PrevMouseY[which1] += 63; + } + else if (delta_y < -63) + { + delta_y = -63; + IPPU.PrevMouseY[which1] -= 63; + } + else + IPPU.PrevMouseY[which1] = y; + + if (delta_x < 0) + { + delta_x = -delta_x; + IPPU.Mouse[which1] |= (delta_x | 0x80) << 16; + } + else + IPPU.Mouse[which1] |= delta_x << 16; + + if (delta_y < 0) + { + delta_y = -delta_y; + IPPU.Mouse[which1] |= (delta_y | 0x80) << 24; + } + else + IPPU.Mouse[which1] |= delta_y << 24; + + if (IPPU.Controller == SNES_MOUSE_SWAPPED) + IPPU.Joypads[0] = IPPU.Mouse[which1]; + else + IPPU.Joypads[1] = IPPU.Mouse[which1]; + } +} + +void ProcessSuperScope() +{ + int x, y; + uint32 buttons; + + if (IPPU.Controller == SNES_SUPERSCOPE + && S9xReadSuperScopePosition(x, y, buttons)) + { +#define SUPERSCOPE_SIGNATURE 0x00ff + uint32 scope; + + scope = + SUPERSCOPE_SIGNATURE + | ((buttons & 1) << (7 + 8)) + | ((buttons & 2) << (5 + 8)) + | ((buttons & 4) << (3 + 8)) + | ((buttons & 8) << (1 + 8)); + if (x > 255) + x = 255; + if (x < 0) + x = 0; + if (y > PPU.ScreenHeight - 1) + y = PPU.ScreenHeight - 1; + if (y < 0) + y = 0; + + PPU.VBeamPosLatched = (uint16) (y + 1); + PPU.HBeamPosLatched = (uint16) x; + PPU.HVBeamCounterLatched = TRUE; + Memory.FillRAM[0x213F] |= 0x40; + IPPU.Joypads[1] = scope; + } +} + +void S9xNextController() +{ + switch (IPPU.Controller) + { + case SNES_MULTIPLAYER5 : + IPPU.Controller = SNES_JOYPAD; + break; + case SNES_JOYPAD : + if (Settings.MouseMaster) + { + IPPU.Controller = SNES_MOUSE_SWAPPED; + break; + } + case SNES_MOUSE_SWAPPED : + if (Settings.MouseMaster) + { + IPPU.Controller = SNES_MOUSE; + break; + } + case SNES_MOUSE : + if (Settings.SuperScopeMaster) + { + IPPU.Controller = SNES_SUPERSCOPE; + break; + } + case SNES_SUPERSCOPE : + if (Settings.MultiPlayer5Master) + { + IPPU.Controller = SNES_MULTIPLAYER5; + break; + } + default : + IPPU.Controller = SNES_JOYPAD; + break; + } +} + +void S9xUpdateJoypads() +{ +#if defined (__WIZ__) + IPPU.Joypads[0] = S9xReadJoypad (0); + + if (IPPU.Joypads[0] & SNES_LEFT_MASK) + IPPU.Joypads[0] &= ~SNES_RIGHT_MASK; + if (IPPU.Joypads[0] & SNES_UP_MASK) + IPPU.Joypads[0] &= ~SNES_DOWN_MASK; + + if (Memory.FillRAM [0x4200] & 1) + { + PPU.Joypad1ButtonReadPos = 16; + + Memory.FillRAM [0x4218] = (uint8) IPPU.Joypads[0]; + Memory.FillRAM [0x4219] = (uint8) (IPPU.Joypads[0] >> 8); + if (Memory.FillRAM [0x4201] & 0x80) + { + Memory.FillRAM [0x421c] = (uint8) IPPU.Joypads[0]; + Memory.FillRAM [0x421d] = (uint8) (IPPU.Joypads[0] >> 8); + } + } +#else + int i; + + for (i = 0; i < 5; i++) + { + IPPU.Joypads[i] = S9xReadJoypad(i); + if (IPPU.Joypads[i] & SNES_LEFT_MASK) + IPPU.Joypads[i] &= ~SNES_RIGHT_MASK; + if (IPPU.Joypads[i] & SNES_UP_MASK) + IPPU.Joypads[i] &= ~SNES_DOWN_MASK; + } + + if (IPPU.Controller == SNES_JOYPAD + || IPPU.Controller == SNES_MULTIPLAYER5) + { + for (i = 0; i < 5; i++) + { + if (IPPU.Joypads[i]) + IPPU.Joypads[i] |= 0xffff0000; + } + } + + // Read mouse position if enabled + if (Settings.MouseMaster) + { + for (i = 0; i < 2; i++) + S9xProcessMouse(i); + } + + // Read SuperScope if enabled + if (Settings.SuperScopeMaster) + ProcessSuperScope(); + + if (Memory.FillRAM[0x4200] & 1) + { + PPU.Joypad1ButtonReadPos = 16; + if (Memory.FillRAM[0x4201] & 0x80) + { + PPU.Joypad2ButtonReadPos = 16; + PPU.Joypad3ButtonReadPos = 0; + } + else + { + PPU.Joypad2ButtonReadPos = 0; + PPU.Joypad3ButtonReadPos = 16; + } + + Memory.FillRAM[0x4218] = (uint8) IPPU.Joypads[0]; + Memory.FillRAM[0x4219] = (uint8) (IPPU.Joypads[0] >> 8); + Memory.FillRAM[0x421a] = (uint8) IPPU.Joypads[1]; + Memory.FillRAM[0x421b] = (uint8) (IPPU.Joypads[1] >> 8); + if (Memory.FillRAM[0x4201] & 0x80) + { + Memory.FillRAM[0x421c] = (uint8) IPPU.Joypads[0]; + Memory.FillRAM[0x421d] = (uint8) (IPPU.Joypads[0] >> 8); + Memory.FillRAM[0x421e] = (uint8) IPPU.Joypads[2]; + Memory.FillRAM[0x421f] = (uint8) (IPPU.Joypads[2] >> 8); + } + else + { + Memory.FillRAM[0x421c] = (uint8) IPPU.Joypads[3]; + Memory.FillRAM[0x421d] = (uint8) (IPPU.Joypads[3] >> 8); + Memory.FillRAM[0x421e] = (uint8) IPPU.Joypads[4]; + Memory.FillRAM[0x421f] = (uint8) (IPPU.Joypads[4] >> 8); + } + } +#endif +} + +void S9xSuperFXExec() +{ + if ((Memory.FillRAM[0x3000 + GSU_SFR] & FLG_G) + && (Memory.FillRAM[0x3000 + GSU_SCMR] & 0x18) == 0x18) + { + if (!Settings.WinterGold||Settings.StarfoxHack) + FxEmulate(~0); + else FxEmulate((Memory.FillRAM[0x3000 + GSU_CLSR] & 1) ? 700 : 350); + int GSUStatus = Memory.FillRAM[0x3000 + + GSU_SFR] | (Memory.FillRAM[0x3000 + GSU_SFR + 1] << 8); + if ((GSUStatus & (FLG_G | FLG_IRQ)) == FLG_IRQ) + { + // Trigger a GSU IRQ. + S9xSetIRQ(GSU_IRQ_SOURCE); + } + } +} + -- cgit v1.2.3