AppleWin/source/Z80/z80emu.cpp

56 lines
1.6 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"
// Variaveis
int CPMZ80Slot = 0;
int Z80_IRQ = 0;
BYTE __stdcall CPMZ80_IONull(WORD PC, WORD uAddr, BYTE bWrite, BYTE uValue, ULONG nCyclesLeft)
{
return IO_Null(PC, uAddr, bWrite, uValue, nCyclesLeft);
}
BYTE __stdcall CPMZ80_IOWrite(WORD PC, WORD uAddr, BYTE bWrite, BYTE uValue, ULONG nCyclesLeft)
{
if ((uAddr & 0xFF00) == (0xC000 + (CPMZ80Slot << 8)))
{
g_ActiveCPU = (g_ActiveCPU == CPU_6502) ? CPU_Z80 : CPU_6502;
}
return IO_Null(PC, uAddr, bWrite, uValue, nCyclesLeft);
}
//===========================================================================
void ConfigureSoftcard(LPBYTE pCxRomPeripheral, int Slot, UINT addOrRemove)
{
//LPBYTE pCxRomPeripheral = MemGetCxRomPeripheral();
//if (pCxRomPeripheral == NULL)
// return;
//UINT uOffset = (m_by6821B << 7) & 0x0700;
//memcpy(pCxRomPeripheral+m_uSlot*256, m_pSlotRom+uOffset, 256);
//if (mem)
// memcpy(mem+0xC000+m_uSlot*256, m_pSlotRom+uOffset, 256);
memset(pCxRomPeripheral + (Slot << 8), 0xFF, 256);
CPMZ80Slot = Slot;
RegisterIoHandler(Slot, CPMZ80_IONull, CPMZ80_IONull, CPMZ80_IONull, addOrRemove ? CPMZ80_IOWrite : NULL, NULL, NULL);
}
// EOF