Z80IO.h

/*** Z80Em: Portable Z80 emulator *******************************************/
/***                                                                      ***/
/***                                Z80IO.h                               ***/
/***                                                                      ***/
/*** This file contains the prototypes for the functions accessing memory ***/
/*** and I/O in M2000, the portable P2000 emulator                        ***/
/***                                                                      ***/
/*** Copyright (C) Marcel de Kogel 1996,1997                              ***/
/***     You are not allowed to distribute this software commercially     ***/
/***     Please, notify me, if you make any changes to this file          ***/
/****************************************************************************/

/****************************************************************************/
/* Input a byte from given I/O port                                         */
/****************************************************************************/
byte Z80_In (byte Port);

/****************************************************************************/
/* Output a byte to given I/O port                                          */
/****************************************************************************/
void Z80_Out (byte Port,byte Value);

/****************************************************************************/
/* Read a byte from given memory location                                   */
/****************************************************************************/
extern byte *ReadPage[256];
#define Z80_RDMEM(a) ReadPage[(a)>>8][(a)&0xFF]

/****************************************************************************/
/* Write a byte to given memory location                                    */
/****************************************************************************/
extern byte *WritePage[256];
#define Z80_WRMEM(a,v) WritePage[(a)>>8][(a)&0xFF]=v

/****************************************************************************/
/* Since the P2000 doesn't use memory mapped I/O nor opcode encryption, we  */
/* can simply do with the macro definitions below                           */
/****************************************************************************/
#define Z80_RDOP(A)      Z80_RDMEM(A)
#define Z80_RDOP_ARG(A)  Z80_RDMEM(A)
#define Z80_RDSTACK(A)   Z80_RDMEM(A)
#define Z80_WRSTACK(A,V) Z80_WRMEM(A,V)