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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.
*/
#ifndef _apu_h_
#define _apu_h_
#include "spc700.h"
/*
typedef union
{
struct { uint8 A, Y; } B;
uint16 W;
} YAndA;
*/
struct SIAPU
{
uint8 *DirectPage; // 0x00
uint32 Address; // 0x04 c core only
uint8 *WaitAddress1; // 0x08
uint8 *WaitAddress2; // 0x0C
uint32 WaitCounter; // 0x10
uint8 *ShadowRAM; // 0x14
uint8 *CachedSamples; // 0x18
uint8 _Carry; // 0x1C c core only
uint8 _Overflow; // 0x1D c core only
uint8 Bit; // 0x1E c core only
uint8 pad0;
uint32 TimerErrorCounter; // 0x20
uint32 Scanline; // 0x24
int32 OneCycle; // 0x28
int32 TwoCycles; // 0x2C
// notaz: reordered and moved everything here, for faster context load/save
uint32 *asmJumpTab; // 0x30
uint8 *PC; // 0x34
YAndA YA; // 0x38 0x0000YYAA
uint8 P; // 0x3C flags: NODBHIZC
uint8 pad1;
uint8 pad2;
uint8 _Zero; // 0x3F Z=0, when this!=0; also stores neg flag in &0x80
uint8 X; // 0x40
uint8 S; // 0x41 stack pointer, default: 0xff
uint16 pad3;
uint8 *RAM; // 0x44
uint8 *ExtraRAM; // 0x48 shortcut to APU.ExtraRAM
uint16 memread_addr;
uint8 memread_data;
uint16 memwrite_addr;
uint8 memwrite_data;
int icount;
uint8 opcode;
uint16 ya_prev;
uint8 x_prev;
};
struct SAPU
{
int32 Cycles;
bool8 ShowROM;
uint8 Flags;
uint8 KeyedChannels;
uint8 OutPorts [4];
uint8 DSP [0x80];
uint8 ExtraRAM [64];
uint16 Timer [3];
uint16 TimerTarget [3];
bool8 TimerEnabled [3];
bool8 TimerValueWritten [3];
};
EXTERN_C struct SAPU APU;
EXTERN_C struct SIAPU IAPU;
EXTERN_C struct SIAPU IAPU2;
EXTERN_C struct SIAPU *pIAPU;
STATIC inline void S9xAPUUnpackStatus()
{
IAPU._Zero =((IAPU.P & Zero) == 0) | (IAPU.P & Negative);
IAPU._Carry = (IAPU.P & Carry);
IAPU._Overflow = (IAPU.P & Overflow);
}
STATIC inline void S9xAPUPackStatus()
{
IAPU.P &= ~(Zero | Negative | Carry | Overflow);
if(IAPU._Carry) IAPU.P |= Carry;
if(!IAPU._Zero) IAPU.P |= Zero;
if(IAPU._Overflow) IAPU.P |= Overflow;
if(IAPU._Zero & 0x80) IAPU.P |= Negative;
}
START_EXTERN_C
void S9xResetAPU (void);
bool8 S9xInitAPU ();
void S9xDeinitAPU ();
void S9xDecacheSamples ();
int S9xTraceAPU ();
int S9xAPUOPrint (char *buffer, uint16 Address);
void S9xSetAPUControl (uint8 byte);
void S9xSetAPUDSP (uint8 byte);
uint8 S9xGetAPUDSP ();
void S9xSetAPUTimer (uint16 Address, uint8 byte);
bool8 S9xInitSound (int quality, bool8 stereo, int buffer_size);
void S9xOpenCloseSoundTracingFile (bool8);
void S9xPrintAPUState ();
extern int32 S9xAPUCycles [256]; // Scaled cycle lengths
extern int32 S9xAPUCycleLengths [256]; // Raw data.
extern void (*S9xApuOpcodes [256]) (void);
extern void (*S9xApuOpcodesReal [256]) (void);
void APUCompare();
END_EXTERN_C
#define APU_VOL_LEFT 0x00
#define APU_VOL_RIGHT 0x01
#define APU_P_LOW 0x02
#define APU_P_HIGH 0x03
#define APU_SRCN 0x04
#define APU_ADSR1 0x05
#define APU_ADSR2 0x06
#define APU_GAIN 0x07
#define APU_ENVX 0x08
#define APU_OUTX 0x09
#define APU_MVOL_LEFT 0x0c
#define APU_MVOL_RIGHT 0x1c
#define APU_EVOL_LEFT 0x2c
#define APU_EVOL_RIGHT 0x3c
#define APU_KON 0x4c
#define APU_KOFF 0x5c
#define APU_FLG 0x6c
#define APU_ENDX 0x7c
#define APU_EFB 0x0d
#define APU_PMON 0x2d
#define APU_NON 0x3d
#define APU_EON 0x4d
#define APU_DIR 0x5d
#define APU_ESA 0x6d
#define APU_EDL 0x7d
#define APU_C0 0x0f
#define APU_C1 0x1f
#define APU_C2 0x2f
#define APU_C3 0x3f
#define APU_C4 0x4f
#define APU_C5 0x5f
#define APU_C6 0x6f
#define APU_C7 0x7f
#define APU_SOFT_RESET 0x80
#define APU_MUTE 0x40
#define APU_ECHO_DISABLED 0x20
#define FREQUENCY_MASK 0x3fff
#endif
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