From d40ae99422e118188a7f48055dc340c6aca022aa Mon Sep 17 00:00:00 2001 From: Kitty Draper Date: Sat, 5 Mar 2011 21:39:25 -0500 Subject: first commit --- source/sa1.h | 223 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 223 insertions(+) create mode 100644 source/sa1.h (limited to 'source/sa1.h') diff --git a/source/sa1.h b/source/sa1.h new file mode 100644 index 0000000..21353d5 --- /dev/null +++ b/source/sa1.h @@ -0,0 +1,223 @@ +/******************************************************************************* + 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" + +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; +}; + +#define SA1CheckZero() (SA1._Zero == 0) +#define SA1CheckCarry() (SA1._Carry) +#define SA1CheckIRQ() (SA1Registers.PL & IRQ) +#define SA1CheckDecimal() (SA1Registers.PL & Decimal) +#define SA1CheckIndex() (SA1Registers.PL & IndexFlag) +#define SA1CheckMemory() (SA1Registers.PL & MemoryFlag) +#define SA1CheckOverflow() (SA1._Overflow) +#define SA1CheckNegative() (SA1._Negative & 0x80) +#define SA1CheckEmulation() (SA1Registers.P.W & Emulation) + +#define SA1ClearFlags(f) (SA1Registers.P.W &= ~(f)) +#define SA1SetFlags(f) (SA1Registers.P.W |= (f)) +#define SA1CheckFlag(f) (SA1Registers.PL & (f)) + + +START_EXTERN_C +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 SSA1Registers SA1Registers; +extern struct SSA1 SA1; + +void S9xSA1MainLoop (); +void S9xSA1Init (); +void S9xFixSA1AfterSnapshotLoad (); +void S9xSA1ExecuteDuringSleep (); +END_EXTERN_C + +#define SNES_IRQ_SOURCE (1 << 7) +#define TIMER_IRQ_SOURCE (1 << 6) +#define DMA_IRQ_SOURCE (1 << 5) + +STATIC inline void S9xSA1UnpackStatus() +{ + SA1._Zero = (SA1Registers.PL & Zero) == 0; + SA1._Negative = (SA1Registers.PL & Negative); + SA1._Carry = (SA1Registers.PL & Carry); + SA1._Overflow = (SA1Registers.PL & Overflow) >> 6; +} + +STATIC inline void S9xSA1PackStatus() +{ + SA1Registers.PL &= ~(Zero | Negative | Carry | Overflow); + SA1Registers.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 + -- cgit v1.2.3