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New callback_setupat call

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2472
This commit is contained in:
Sjoerd van der Berg 2006-02-03 17:07:41 +00:00
parent ab78ad03e6
commit 734c9856e1
2 changed files with 31 additions and 28 deletions
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7
include/callback.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: callback.h,v 1.14 2005-08-08 13:33:43 c2woody Exp $ */
/* $Id: callback.h,v 1.15 2006-02-03 17:07:41 harekiet Exp $ */
#ifndef DOSBOX_CALLBACK_H
#define DOSBOX_CALLBACK_H
@ -28,7 +28,7 @@
typedef Bitu (*CallBack_Handler)(void);
extern CallBack_Handler CallBack_Handlers[];
enum { CB_RETF,CB_IRET,CB_IRET_STI };
enum { CB_RETN, CB_RETF,CB_IRET,CB_IRET_STI };
#define CB_MAX 144
#define CB_SEG 0xC800
@ -52,7 +52,8 @@ void CALLBACK_RunRealInt(Bit8u intnum);
void CALLBACK_RunRealFar(Bit16u seg,Bit16u off);
bool CALLBACK_Setup(Bitu callback,CallBack_Handler handler,Bitu type,const char* description=0);
bool CALLBACK_SetupAt(Bitu callback,CallBack_Handler handler,Bitu type,Bitu linearAddress, const char* description=0);
/* Returns with the size of the extra callback */
Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress);
const char* CALLBACK_GetDescription(Bitu callback);
bool CALLBACK_Free(Bitu callback);

52
src/cpu/callback.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: callback.cpp,v 1.28 2005-09-08 13:09:47 qbix79 Exp $ */
/* $Id: callback.cpp,v 1.29 2006-02-03 17:07:41 harekiet Exp $ */
#include <stdlib.h>
#include <string.h>
@ -154,10 +154,8 @@ bool CALLBACK_Setup(Bitu callback,CallBack_Handler handler,Bitu type,const char*
phys_writew(CB_BASE+(callback<<4)+3,callback); //The immediate word
phys_writeb(CB_BASE+(callback<<4)+5,(Bit8u)0xCF); //An IRET Instruction
break;
default:
E_Exit("CALLBACK:Setup:Illegal type %d",type);
}
CallBack_Handlers[callback]=handler;
CALLBACK_SetDescription(callback,descr);
@ -170,35 +168,39 @@ void CALLBACK_RemoveSetup(Bitu callback) {
}
}
bool CALLBACK_SetupAt(Bitu callback,CallBack_Handler handler,Bitu type,Bitu linearAddress,const char* descr) {
if (callback>=CB_MAX) return false;
Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress) {
if (callback>=CB_MAX)
return 0;
switch (type) {
case CB_RETN:
phys_writeb(physAddress+0,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+1,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+2, callback); //The immediate word
phys_writeb(physAddress+4,(Bit8u)0xC3); //A RETN Instruction
return 5;
case CB_RETF:
mem_writeb(linearAddress+0,(Bit8u)0xFE); //GRP 4
mem_writeb(linearAddress+1,(Bit8u)0x38); //Extra Callback instruction
mem_writew(linearAddress+2, callback); //The immediate word
mem_writeb(linearAddress+4,(Bit8u)0xCB); //A RETF Instruction
break;
phys_writeb(physAddress+0,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+1,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+2, callback); //The immediate word
phys_writeb(physAddress+4,(Bit8u)0xCB); //A RETF Instruction
return 5;
case CB_IRET:
mem_writeb(linearAddress+0,(Bit8u)0xFE); //GRP 4
mem_writeb(linearAddress+1,(Bit8u)0x38); //Extra Callback instruction
mem_writew(linearAddress+2,callback); //The immediate word
mem_writeb(linearAddress+4,(Bit8u)0xCF); //An IRET Instruction
break;
phys_writeb(physAddress+0,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+1,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+2,callback); //The immediate word
phys_writeb(physAddress+4,(Bit8u)0xCF); //An IRET Instruction
return 5;
case CB_IRET_STI:
mem_writeb(linearAddress+0,(Bit8u)0xFB); //STI
mem_writeb(linearAddress+1,(Bit8u)0xFE); //GRP 4
mem_writeb(linearAddress+2,(Bit8u)0x38); //Extra Callback instruction
mem_writew(linearAddress+3, callback); //The immediate word
mem_writeb(linearAddress+5,(Bit8u)0xCF); //An IRET Instruction
break;
phys_writeb(physAddress+0,(Bit8u)0xFB); //STI
phys_writeb(physAddress+1,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+2,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+3, callback); //The immediate word
phys_writeb(physAddress+5,(Bit8u)0xCF); //An IRET Instruction
return 6;
default:
E_Exit("CALLBACK:Setup:Illegal type %d",type);
}
CallBack_Handlers[callback]=handler;
CALLBACK_SetDescription(callback,descr);
return true;
return 0;
}
CALLBACK_HandlerObject::~CALLBACK_HandlerObject(){