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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 _sa1_h_
#define _sa1_h_
#include "memmap.h"
#include "cpuexec.h"
struct SSA1Registers {
uint8 PB;
uint8 DB;
pair P;
pair A;
pair D;
pair S;
pair X;
pair Y;
uint16 PC;
};
struct SSA1 {
struct SOpcodes *S9xOpcodes;
uint8 _Carry;
uint8 _Zero;
uint8 _Negative;
uint8 _Overflow;
bool8 CPUExecuting;
uint32 ShiftedPB;
uint32 ShiftedDB;
uint32 Flags;
bool8 Executing;
bool8 NMIActive;
bool8 IRQActive;
bool8 WaitingForInterrupt;
bool8 Waiting;
// uint8 WhichEvent;
uint8 *PC;
uint8 *PCBase;
uint8 *BWRAM;
uint8 *PCAtOpcodeStart;
uint8 *WaitAddress;
uint32 WaitCounter;
uint8 *WaitByteAddress1;
uint8 *WaitByteAddress2;
// long Cycles;
// long NextEvent;
// long V_Counter;
uint8 *Map [MEMMAP_NUM_BLOCKS];
uint8 *WriteMap [MEMMAP_NUM_BLOCKS];
int16 op1;
int16 op2;
int arithmetic_op;
int64 sum;
bool8 overflow;
uint8 VirtualBitmapFormat;
bool8 in_char_dma;
uint8 variable_bit_pos;
struct SSA1Registers Registers;
};
#define SA1CheckZero() (SA1._Zero == 0)
#define SA1CheckCarry() (SA1._Carry)
#define SA1CheckIRQ() (SA1.Registers.PL & IRQ)
#define SA1CheckDecimal() (SA1.Registers.PL & Decimal)
#define SA1CheckIndex() (SA1.Registers.PL & IndexFlag)
#define SA1CheckMemory() (SA1.Registers.PL & MemoryFlag)
#define SA1CheckOverflow() (SA1._Overflow)
#define SA1CheckNegative() (SA1._Negative & 0x80)
#define SA1CheckEmulation() (SA1.Registers.P.W & Emulation)
#define SA1ClearFlags(f) (SA1.Registers.P.W &= ~(f))
#define SA1SetFlags(f) (SA1.Registers.P.W |= (f))
#define SA1CheckFlag(f) (SA1.Registers.PL & (f))
uint8 S9xSA1GetByte (uint32);
uint16 S9xSA1GetWord (uint32);
void S9xSA1SetByte (uint8, uint32);
void S9xSA1SetWord (uint16, uint32);
void S9xSA1SetPCBase (uint32);
uint8 S9xGetSA1 (uint32);
void S9xSetSA1 (uint8, uint32);
extern struct SOpcodes S9xSA1OpcodesM1X1 [256];
extern struct SOpcodes S9xSA1OpcodesM1X0 [256];
extern struct SOpcodes S9xSA1OpcodesM0X1 [256];
extern struct SOpcodes S9xSA1OpcodesM0X0 [256];
extern struct SSA1 SA1;
void S9xSA1MainLoop ();
void S9xSA1Init ();
void S9xFixSA1AfterSnapshotLoad ();
void S9xSA1ExecuteDuringSleep ();
#define SNES_IRQ_SOURCE (1 << 7)
#define TIMER_IRQ_SOURCE (1 << 6)
#define DMA_IRQ_SOURCE (1 << 5)
STATIC inline void S9xSA1UnpackStatus()
{
SA1._Zero = (SA1.Registers.PL & Zero) == 0;
SA1._Negative = (SA1.Registers.PL & Negative);
SA1._Carry = (SA1.Registers.PL & Carry);
SA1._Overflow = (SA1.Registers.PL & Overflow) >> 6;
}
STATIC inline void S9xSA1PackStatus()
{
SA1.Registers.PL &= ~(Zero | Negative | Carry | Overflow);
SA1.Registers.PL |= SA1._Carry | ((SA1._Zero == 0) << 1) |
(SA1._Negative & 0x80) | (SA1._Overflow << 6);
}
STATIC inline void S9xSA1FixCycles ()
{
if (SA1CheckEmulation ())
SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
else
if (SA1CheckMemory ())
{
if (SA1CheckIndex ())
SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
else
SA1.S9xOpcodes = S9xSA1OpcodesM1X0;
}
else
{
if (SA1CheckIndex ())
SA1.S9xOpcodes = S9xSA1OpcodesM0X1;
else
SA1.S9xOpcodes = S9xSA1OpcodesM0X0;
}
}
#endif
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