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CATSFC/source/apu.h
Nebuleon Fumika 5e3426d0d2 Remove 320 KiB of memory allocations in APU emulation that were completely unused but constantly re-zeroed. 
Frees up 320 KiB for other uses, and saves ~4 milliseconds at emulator startup, when resetting the APU and when loading a new game.
2013-02-06 19:07:39 -05:00

213 lines
6.3 KiB
C
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/*******************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
Jerremy Koot (jkoot@snes9x.com)
(c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
(c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
funkyass (funkyass@spam.shaw.ca),
Joel Yliluoma (http://iki.fi/bisqwit/)
Kris Bleakley (codeviolation@hotmail.com),
Matthew Kendora,
Nach (n-a-c-h@users.sourceforge.net),
Peter Bortas (peter@bortas.org) and
zones (kasumitokoduck@yahoo.com)
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
_Demo_ (_demo_@zsnes.com), and Nach
C4 C++ code
(c) Copyright 2003 Brad Jorsch
DSP-1 emulator code
(c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
John Weidman, neviksti (neviksti@hotmail.com),
Kris Bleakley, Andreas Naive
DSP-2 emulator code
(c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
Lord Nightmare (lord_nightmare@users.sourceforge.net
OBC1 emulator code
(c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
Kris Bleakley
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code
(c) Copyright 2002 Matthew Kendora with research by
zsKnight, John Weidman, and Dark Force
S-DD1 C emulator code
(c) Copyright 2003 Brad Jorsch with research by
Andreas Naive and John Weidman
S-RTC C emulator code
(c) Copyright 2001 John Weidman
ST010 C++ emulator code
(c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
SH assembler code partly based on x86 assembler code
(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
Specific ports 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"
struct SIAPU
{
uint8 *PC;
struct SAPURegisters Registers;
uint8 *RAM;
uint8 *DirectPage;
bool8 APUExecuting;
uint8 Bit;
uint32 Address;
uint8 *WaitAddress1;
uint8 *WaitAddress2;
uint32 WaitCounter;
uint8 _Carry;
uint8 _Zero;
uint8 _Overflow;
uint32 TimerErrorCounter;
uint32 Scanline;
int32 OneCycle;
int32 TwoCycles;
};
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 int spc_is_dumping;
extern int spc_is_dumping_temp;
extern uint8 spc_dump_dsp[0x100];
STATIC inline void S9xAPUUnpackStatus()
{
IAPU._Zero = ((IAPU.Registers.P & Zero) == 0) | (IAPU.Registers.P & Negative);
IAPU._Carry = (IAPU.Registers.P & Carry);
IAPU._Overflow = (IAPU.Registers.P & Overflow) >> 6;
}
STATIC inline void S9xAPUPackStatus()
{
IAPU.Registers.P &= ~(Zero | Negative | Carry | Overflow);
IAPU.Registers.P |= IAPU._Carry | ((IAPU._Zero == 0) << 1) |
(IAPU._Zero & 0x80) | (IAPU._Overflow << 6);
}
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 uint16 S9xAPUCycles [256]; // Scaled cycle lengths
extern uint16 S9xAPUCycleLengths [256]; // Raw data.
extern void (*S9xApuOpcodes [256]) (void);
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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