AppleWin/source/z80emu.cpp

48 lines
1.4 KiB
C++

/* Emulador do computador TK3000 //e (Microdigital)
* por Fábio Belavenuto - Copyright (C) 2004
*
* Adaptado do emulador Applewin por Michael O'Brien
* Part of code is Copyright (C) 2003-2004 Tom Charlesworth
*
* Este arquivo é distribuido pela Licença Pública Geral GNU.
* Veja o arquivo Licenca.txt distribuido com este software.
*
* ESTE SOFTWARE NÃO OFERECE NENHUMA GARANTIA
*
*/
// Emula a CPU Z80
#include "StdAfx.h"
#include "z80emu.h"
#include "CPU.h"
#include "Memory.h"
// Variaveis
static int g_uCPMZ80Slot = 0;
BYTE __stdcall CPMZ80_IONull(WORD PC, WORD uAddr, BYTE bWrite, BYTE uValue, ULONG nExecutedCycles)
{
return IO_Null(PC, uAddr, bWrite, uValue, nExecutedCycles);
}
BYTE __stdcall CPMZ80_IOWrite(WORD PC, WORD uAddr, BYTE bWrite, BYTE uValue, ULONG nExecutedCycles)
{
if ((uAddr & 0xFF00) == (0xC000 + (g_uCPMZ80Slot << 8)))
SetActiveCpu( GetActiveCpu() == CPU_Z80 ? GetMainCpu() : CPU_Z80 );
return IO_Null(PC, uAddr, bWrite, uValue, nExecutedCycles);
}
//===========================================================================
void Z80_InitializeIO(LPBYTE pCxRomPeripheral, UINT uSlot)
{
memset(pCxRomPeripheral + (uSlot << 8), 0xFF, APPLE_SLOT_SIZE);
g_uCPMZ80Slot = uSlot;
RegisterIoHandler(uSlot, CPMZ80_IONull, CPMZ80_IONull, CPMZ80_IONull, CPMZ80_IOWrite, NULL, NULL);
}