400 lines
7.1 KiB
C
400 lines
7.1 KiB
C
/* Multi-Z80 32 Bit emulator */
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/* Copyright 1996, Neil Bradley, All rights reserved
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*
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* License agreement:
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*
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* The mZ80 emulator may be distributed in unmodified form to any medium.
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*
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* mZ80 May not be sold, or sold as a part of a commercial package without
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* the express written permission of Neil Bradley (neil@synthcom.com). This
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* includes shareware.
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*
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* Modified versions of mZ80 may not be publicly redistributed without author
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* approval (neil@synthcom.com). This includes distributing via a publicly
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* accessible LAN. You may make your own source modifications and distribute
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* mZ80 in object only form.
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*
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* mZ80 Licensing for commercial applications is available. Please email
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* neil@synthcom.com for details.
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*
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* Synthcom Systems, Inc, and Neil Bradley will not be held responsible for
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* any damage done by the use of mZ80. It is purely "as-is".
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*
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* If you use mZ80 in a freeware application, credit in the following text:
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*
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* "Multi-Z80 CPU emulator by Neil Bradley (neil@synthcom.com)"
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*
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* must accompany the freeware application within the application itself or
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* in the documentation.
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*
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* Legal stuff aside:
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*
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* If you find problems with mZ80, please email the author so they can get
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* resolved. If you find a bug and fix it, please also email the author so
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* that those bug fixes can be propogated to the installed base of mZ80
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* users. If you find performance improvements or problems with mZ80, please
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* email the author with your changes/suggestions and they will be rolled in
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* with subsequent releases of mZ80.
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*
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* The whole idea of this emulator is to have the fastest available 32 bit
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* Multi-z80 emulator for the PC, giving maximum performance.
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*/
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/* General z80 based defines */
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#ifndef _MZ80_H_
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#define _MZ80_H_
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#include <stdint.h>
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#ifndef UINT32
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#define UINT32 uint32_t
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#endif
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#ifndef UINT16
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#define UINT16 uint16_t
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#endif
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#ifndef UINT8
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#define UINT8 uint8_t
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#endif
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#ifndef INT32
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#define INT32 int32_t
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#endif
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#ifndef INT16
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#define INT16 int16_t
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#endif
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#ifndef INT8
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#define INT8 int8_t
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#endif
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#ifndef UINTPTR
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#define UINTPTR uintptr_t
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _MEMORYREADWRITEBYTE_
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#define _MEMORYREADWRITEBYTE_
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struct MemoryWriteByte
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{
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UINT32 lowAddr;
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UINT32 highAddr;
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void (*memoryCall)(UINT32, UINT8, struct MemoryWriteByte *);
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void *pUserArea;
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};
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struct MemoryReadByte
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{
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UINT32 lowAddr;
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UINT32 highAddr;
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UINT8 (*memoryCall)(UINT32, struct MemoryReadByte *);
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void *pUserArea;
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};
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#endif // _MEMORYREADWRITEBYTE_
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struct z80PortWrite
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{
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UINT16 lowIoAddr;
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UINT16 highIoAddr;
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void (*IOCall)(UINT16, UINT8, struct z80PortWrite *);
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void *pUserArea;
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};
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struct z80PortRead
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{
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UINT16 lowIoAddr;
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UINT16 highIoAddr;
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UINT16 (*IOCall)(UINT16, struct z80PortRead *);
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void *pUserArea;
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};
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struct z80TrapRec
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{
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UINT16 trapAddr;
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UINT8 skipCnt;
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UINT8 origIns;
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};
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typedef union
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{
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UINT32 af;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 a;
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UINT8 f;
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#else
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UINT8 f;
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UINT8 a;
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UINT16 wFiller;
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#endif
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} half;
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} reg_af;
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#define z80AF z80af.af
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#define z80A z80af.half.a
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#define z80F z80af.half.f
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typedef union
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{
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UINT32 bc;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 b;
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UINT8 c;
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#else
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UINT8 c;
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UINT8 b;
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UINT16 wFiller;
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#endif
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} half;
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} reg_bc;
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#define z80BC z80bc.bc
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#define z80B z80bc.half.b
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#define z80C z80bc.half.c
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typedef union
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{
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UINT32 de;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 d;
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UINT8 e;
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#else
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UINT8 e;
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UINT8 d;
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UINT16 wFiller;
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#endif
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} half;
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} reg_de;
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#define z80DE z80de.de
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#define z80D z80de.half.d
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#define z80E z80de.half.e
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typedef union
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{
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UINT32 hl;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 h;
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UINT8 l;
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#else
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UINT8 l;
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UINT8 h;
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UINT16 wFiller;
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#endif
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} half;
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} reg_hl;
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#define z80HL z80hl.hl
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#define z80H z80hl.half.h
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#define z80L z80hl.half.l
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#define z80SP z80sp.sp
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typedef union
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{
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UINT32 ix;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 xh;
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UINT8 xl;
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#else
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UINT8 xl;
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UINT8 xh;
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UINT16 wFiller;
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#endif
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} half;
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} reg_ix;
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#define z80IX z80ix.ix
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#define z80XH z80ix.half.xh
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#define z80XL z80ix.half.xl
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typedef union
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{
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UINT32 iy;
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struct
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{
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#ifdef WORDS_BIGENDIAN
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UINT16 wFiller;
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UINT8 yh;
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UINT8 yl;
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#else
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UINT8 yl;
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UINT8 yh;
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UINT16 wFiller;
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#endif
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} half;
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} reg_iy;
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#define z80IY z80iy.iy
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#define z80YH z80iy.half.yh
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#define z80YL z80iy.half.yl
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struct mz80context
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{
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UINT8 *z80Base;
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struct MemoryReadByte *z80MemRead;
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struct MemoryWriteByte *z80MemWrite;
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struct z80PortRead *z80IoRead;
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struct z80PortWrite *z80IoWrite;
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UINT32 z80clockticks;
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UINT32 z80iff;
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UINT32 z80interruptMode;
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UINT32 z80halted;
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reg_af z80af;
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reg_bc z80bc;
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reg_de z80de;
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reg_hl z80hl;
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UINT32 z80afprime;
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UINT32 z80bcprime;
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UINT32 z80deprime;
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UINT32 z80hlprime;
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reg_ix z80ix;
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reg_iy z80iy;
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UINT32 z80sp;
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UINT32 z80pc;
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UINT32 z80nmiAddr;
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UINT32 z80intAddr;
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UINT32 z80rCounter;
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UINT8 z80i;
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UINT8 z80r;
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UINT8 z80intPending;
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};
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// These are the enumerations used for register access. DO NOT ALTER THEIR
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// ORDER! It must match the same order as in the mz80.c/mz80.asm files!
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enum
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{
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#ifndef CPUREG_PC
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CPUREG_PC = 0,
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#endif
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CPUREG_Z80_AF = 1,
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CPUREG_Z80_BC,
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CPUREG_Z80_DE,
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CPUREG_Z80_HL,
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CPUREG_Z80_AFPRIME,
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CPUREG_Z80_BCPRIME,
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CPUREG_Z80_DEPRIME,
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CPUREG_Z80_HLPRIME,
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CPUREG_Z80_IX,
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CPUREG_Z80_IY,
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CPUREG_Z80_SP,
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CPUREG_Z80_I,
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CPUREG_Z80_R,
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CPUREG_Z80_A,
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CPUREG_Z80_B,
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CPUREG_Z80_C,
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CPUREG_Z80_D,
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CPUREG_Z80_E,
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CPUREG_Z80_H,
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CPUREG_Z80_L,
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CPUREG_Z80_F,
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CPUREG_Z80_CARRY,
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CPUREG_Z80_NEGATIVE,
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CPUREG_Z80_PARITY,
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CPUREG_Z80_OVERFLOW,
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CPUREG_Z80_HALFCARRY,
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CPUREG_Z80_ZERO,
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CPUREG_Z80_SIGN,
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CPUREG_Z80_IFF1,
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CPUREG_Z80_IFF2,
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// Leave this here!
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CPUREG_Z80_MAX_INDEX
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};
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extern UINT32 mz80exec(UINT32);
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extern UINT32 mz80GetContextSize(void);
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extern UINT32 mz80GetElapsedTicks(UINT32);
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extern void mz80ReleaseTimeslice(void);
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extern void mz80GetContext(void *);
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extern void mz80SetContext(void *);
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extern void mz80reset(void);
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extern void mz80ClearPendingInterrupt(void);
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extern UINT32 mz80int(UINT32);
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extern UINT32 mz80nmi(void);
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extern void mz80init(void);
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extern UINT32 z80intAddr;
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extern UINT32 z80nmiAddr;
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// Debugger useful routines
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extern UINT8 mz80SetRegisterValue(void *, UINT32, UINT32);
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extern UINT32 mz80GetRegisterValue(void *, UINT32);
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extern UINT32 mz80GetRegisterTextValue(void *, UINT32, UINT8 *);
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extern UINT8 *mz80GetRegisterName(UINT32);
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// Memory/IO read/write commands
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#ifndef VALUE_BYTE
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#define VALUE_BYTE 0
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#endif
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#ifndef VALUE_WORD
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#define VALUE_WORD 1
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#endif
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#ifndef VALUE_DWORD
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#define VALUE_DWORD 2
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#endif
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#ifndef VALUE_IO
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#define VALUE_IO 3
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#endif
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extern void mz80WriteValue(UINT8 bWhat, UINT32 dwAddr, UINT32 dwData);
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extern UINT32 mz80ReadValue(UINT8 bWhat, UINT32 dwAddr);
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// Flag definitions
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#define Z80_FLAG_CARRY 0x01
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#define Z80_FLAG_NEGATIVE 0x02
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#define Z80_FLAG_OVERFLOW_PARITY 0x04
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#define Z80_FLAG_UNDEFINED1 0x08
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#define Z80_FLAG_HALF_CARRY 0x10
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#define Z80_FLAG_UNDEFINED2 0x20
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#define Z80_FLAG_ZERO 0x40
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#define Z80_FLAG_SIGN 0x80
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#define IFF1 0x01
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#define IFF2 0x02
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typedef struct mz80context CONTEXTMZ80;
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#ifdef __cplusplus
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}
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#endif
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#endif // _MZ80_H_
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