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picodrive/cpu/mz80/mz80.h
notaz cc68a136aa initial import 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa
2006-12-19 20:53:21 +00:00

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C
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/* Multi-Z80 32 Bit emulator */
/* Copyright 1996, Neil Bradley, All rights reserved
*
* License agreement:
*
* The mZ80 emulator may be distributed in unmodified form to any medium.
*
* mZ80 May not be sold, or sold as a part of a commercial package without
* the express written permission of Neil Bradley (neil@synthcom.com). This
* includes shareware.
*
* Modified versions of mZ80 may not be publicly redistributed without author
* approval (neil@synthcom.com). This includes distributing via a publicly
* accessible LAN. You may make your own source modifications and distribute
* mZ80 in object only form.
*
* mZ80 Licensing for commercial applications is available. Please email
* neil@synthcom.com for details.
*
* Synthcom Systems, Inc, and Neil Bradley will not be held responsible for
* any damage done by the use of mZ80. It is purely "as-is".
*
* If you use mZ80 in a freeware application, credit in the following text:
*
* "Multi-Z80 CPU emulator by Neil Bradley (neil@synthcom.com)"
*
* must accompany the freeware application within the application itself or
* in the documentation.
*
* Legal stuff aside:
*
* If you find problems with mZ80, please email the author so they can get
* resolved. If you find a bug and fix it, please also email the author so
* that those bug fixes can be propogated to the installed base of mZ80
* users. If you find performance improvements or problems with mZ80, please
* email the author with your changes/suggestions and they will be rolled in
* with subsequent releases of mZ80.
*
* The whole idea of this emulator is to have the fastest available 32 bit
* Multi-z80 emulator for the PC, giving maximum performance.
*/
/* General z80 based defines */
#ifndef _MZ80_H_
#define _MZ80_H_
#ifndef UINT32
#define UINT32 unsigned long int
#endif
#ifndef UINT16
#define UINT16 unsigned short int
#endif
#ifndef UINT8
#define UINT8 unsigned char
#endif
#ifndef INT32
#define INT32 signed long int
#endif
#ifndef INT16
#define INT16 signed short int
#endif
#ifndef INT8
#define INT8 signed char
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _MEMORYREADWRITEBYTE_
#define _MEMORYREADWRITEBYTE_
struct MemoryWriteByte
{
UINT32 lowAddr;
UINT32 highAddr;
void (*memoryCall)(UINT32, UINT8, struct MemoryWriteByte *);
void *pUserArea;
};
struct MemoryReadByte
{
UINT32 lowAddr;
UINT32 highAddr;
UINT8 (*memoryCall)(UINT32, struct MemoryReadByte *);
void *pUserArea;
};
#endif // _MEMORYREADWRITEBYTE_
struct z80PortWrite
{
UINT16 lowIoAddr;
UINT16 highIoAddr;
void (*IOCall)(UINT16, UINT8, struct z80PortWrite *);
void *pUserArea;
};
struct z80PortRead
{
UINT16 lowIoAddr;
UINT16 highIoAddr;
UINT16 (*IOCall)(UINT16, struct z80PortRead *);
void *pUserArea;
};
struct z80TrapRec
{
UINT16 trapAddr;
UINT8 skipCnt;
UINT8 origIns;
};
typedef union
{
UINT32 af;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 a;
UINT8 f;
#else
UINT8 f;
UINT8 a;
UINT16 wFiller;
#endif
} half;
} reg_af;
#define z80AF z80af.af
#define z80A z80af.half.a
#define z80F z80af.half.f
typedef union
{
UINT32 bc;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 b;
UINT8 c;
#else
UINT8 c;
UINT8 b;
UINT16 wFiller;
#endif
} half;
} reg_bc;
#define z80BC z80bc.bc
#define z80B z80bc.half.b
#define z80C z80bc.half.c
typedef union
{
UINT32 de;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 d;
UINT8 e;
#else
UINT8 e;
UINT8 d;
UINT16 wFiller;
#endif
} half;
} reg_de;
#define z80DE z80de.de
#define z80D z80de.half.d
#define z80E z80de.half.e
typedef union
{
UINT32 hl;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 h;
UINT8 l;
#else
UINT8 l;
UINT8 h;
UINT16 wFiller;
#endif
} half;
} reg_hl;
#define z80HL z80hl.hl
#define z80H z80hl.half.h
#define z80L z80hl.half.l
#define z80SP z80sp.sp
typedef union
{
UINT32 ix;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 xh;
UINT8 xl;
#else
UINT8 xl;
UINT8 xh;
UINT16 wFiller;
#endif
} half;
} reg_ix;
#define z80IX z80ix.ix
#define z80XH z80ix.half.xh
#define z80XL z80ix.half.xl
typedef union
{
UINT32 iy;
struct
{
#ifdef WORDS_BIGENDIAN
UINT16 wFiller;
UINT8 yh;
UINT8 yl;
#else
UINT8 yl;
UINT8 yh;
UINT16 wFiller;
#endif
} half;
} reg_iy;
#define z80IY z80iy.iy
#define z80YH z80iy.half.yh
#define z80YL z80iy.half.yl
struct mz80context
{
UINT8 *z80Base;
struct MemoryReadByte *z80MemRead;
struct MemoryWriteByte *z80MemWrite;
struct z80PortRead *z80IoRead;
struct z80PortWrite *z80IoWrite;
UINT32 z80clockticks;
UINT32 z80iff;
UINT32 z80interruptMode;
UINT32 z80halted;
reg_af z80af;
reg_bc z80bc;
reg_de z80de;
reg_hl z80hl;
UINT32 z80afprime;
UINT32 z80bcprime;
UINT32 z80deprime;
UINT32 z80hlprime;
reg_ix z80ix;
reg_iy z80iy;
UINT32 z80sp;
UINT32 z80pc;
UINT32 z80nmiAddr;
UINT32 z80intAddr;
UINT32 z80rCounter;
UINT8 z80i;
UINT8 z80r;
UINT8 z80intPending;
};
// These are the enumerations used for register access. DO NOT ALTER THEIR
// ORDER! It must match the same order as in the mz80.c/mz80.asm files!
enum
{
#ifndef CPUREG_PC
CPUREG_PC = 0,
#endif
CPUREG_Z80_AF = 1,
CPUREG_Z80_BC,
CPUREG_Z80_DE,
CPUREG_Z80_HL,
CPUREG_Z80_AFPRIME,
CPUREG_Z80_BCPRIME,
CPUREG_Z80_DEPRIME,
CPUREG_Z80_HLPRIME,
CPUREG_Z80_IX,
CPUREG_Z80_IY,
CPUREG_Z80_SP,
CPUREG_Z80_I,
CPUREG_Z80_R,
CPUREG_Z80_A,
CPUREG_Z80_B,
CPUREG_Z80_C,
CPUREG_Z80_D,
CPUREG_Z80_E,
CPUREG_Z80_H,
CPUREG_Z80_L,
CPUREG_Z80_F,
CPUREG_Z80_CARRY,
CPUREG_Z80_NEGATIVE,
CPUREG_Z80_PARITY,
CPUREG_Z80_OVERFLOW,
CPUREG_Z80_HALFCARRY,
CPUREG_Z80_ZERO,
CPUREG_Z80_SIGN,
CPUREG_Z80_IFF1,
CPUREG_Z80_IFF2,
// Leave this here!
CPUREG_Z80_MAX_INDEX
};
extern UINT32 mz80exec(UINT32);
extern UINT32 mz80GetContextSize(void);
extern UINT32 mz80GetElapsedTicks(UINT32);
extern void mz80ReleaseTimeslice(void);
extern void mz80GetContext(void *);
extern void mz80SetContext(void *);
extern void mz80reset(void);
extern void mz80ClearPendingInterrupt(void);
extern UINT32 mz80int(UINT32);
extern UINT32 mz80nmi(void);
extern void mz80init(void);
extern void mz80shutdown(void);
extern UINT32 z80intAddr;
extern UINT32 z80nmiAddr;
// Debugger useful routines
extern UINT8 mz80SetRegisterValue(void *, UINT32, UINT32);
extern UINT32 mz80GetRegisterValue(void *, UINT32);
extern UINT32 mz80GetRegisterTextValue(void *, UINT32, UINT8 *);
extern UINT8 *mz80GetRegisterName(UINT32);
// Memory/IO read/write commands
#ifndef VALUE_BYTE
#define VALUE_BYTE 0
#endif
#ifndef VALUE_WORD
#define VALUE_WORD 1
#endif
#ifndef VALUE_DWORD
#define VALUE_DWORD 2
#endif
#ifndef VALUE_IO
#define VALUE_IO 3
#endif
extern void mz80WriteValue(UINT8 bWhat, UINT32 dwAddr, UINT32 dwData);
extern UINT32 mz80ReadValue(UINT8 bWhat, UINT32 dwAddr);
// Flag definitions
#define Z80_FLAG_CARRY 0x01
#define Z80_FLAG_NEGATIVE 0x02
#define Z80_FLAG_OVERFLOW_PARITY 0x04
#define Z80_FLAG_UNDEFINED1 0x08
#define Z80_FLAG_HALF_CARRY 0x10
#define Z80_FLAG_UNDEFINED2 0x20
#define Z80_FLAG_ZERO 0x40
#define Z80_FLAG_SIGN 0x80
#define IFF1 0x01
#define IFF2 0x02
typedef struct mz80context CONTEXTMZ80;
#ifdef __cplusplus
};
#endif
#endif // _MZ80_H_
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