d0fc1da99b
(env is not fixed) Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@289
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
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* Copyright (C) 2002 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "dosbox.h"
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#include "inout.h"
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IO_ReadBlock IO_ReadTable[IO_MAX];
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IO_WriteBlock IO_WriteTable[IO_MAX];
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void IO_Write(Bitu num,Bit8u val) {
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if (num<IO_MAX) IO_WriteTable[num].handler(num,val);
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else LOG_ERROR("IO:Out or range write %X2 to port %4X",val,num);
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}
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Bit8u IO_Read(Bitu num) {
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if (num<IO_MAX) return IO_ReadTable[num].handler(num);
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else LOG_ERROR("IO:Out or range read from port %4X",num);
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return 0xff;
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}
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static Bit8u IO_ReadBlocked(Bit32u port) {
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return 0xff;
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}
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static void IO_WriteBlocked(Bit32u port,Bit8u val) {
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}
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static Bit8u IO_ReadDefault(Bit32u port) {
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LOG_WARN("Reading from undefined port %04X",port);
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IO_RegisterReadHandler(port,&IO_ReadBlocked,"Blocked Read");
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return 0xff;
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}
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void IO_WriteDefault(Bit32u port,Bit8u val) {
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LOG_WARN("Writing %02X to undefined port %04X",val,port);
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IO_RegisterWriteHandler(port,&IO_WriteBlocked,"Blocked Write");
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}
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void IO_RegisterReadHandler(Bit32u port,IO_ReadHandler * handler,char * name) {
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if (port<IO_MAX) {
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IO_ReadTable[port].handler=handler;
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IO_ReadTable[port].name=name;
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}
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}
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void IO_RegisterWriteHandler(Bit32u port,IO_WriteHandler * handler,char * name) {
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if (port<IO_MAX) {
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IO_WriteTable[port].handler=handler;
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IO_WriteTable[port].name=name;
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}
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}
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void IO_FreeReadHandler(Bit32u port) {
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if (port<IO_MAX) {
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IO_RegisterReadHandler(port,&IO_ReadDefault,"Default Read");
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}
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}
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void IO_FreeWriteHandler(Bit32u port) {
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if (port<IO_MAX) {
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IO_RegisterWriteHandler(port,&IO_WriteDefault,"Default Write");
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}
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}
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void IO_Init(Section * sect) {
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for (Bitu i=0;i<IO_MAX;i++) {
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IO_RegisterReadHandler(i,&IO_ReadDefault,"Default Read");
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IO_RegisterWriteHandler(i,&IO_WriteDefault,"Default Write");
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}
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}
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