valter/dosbox-staging
1
0
Fork 0
Code Releases Activity

move callbacks into read-only memory (Pinball/Adventure construction kit booters)

Browse source 
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2612
This commit is contained in:
Sebastian Strohhäcker 2006-04-22 15:25:45 +00:00
parent 1d11c37e23
commit 1d89346c16
8 changed files with 131 additions and 140 deletions
Download patch file Download diff file Expand all files Collapse all files

46
src/ints/mouse.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: mouse.cpp,v 1.61 2006-02-13 07:48:25 qbix79 Exp $ */
/* $Id: mouse.cpp,v 1.62 2006-04-22 15:25:45 c2woody Exp $ */
#include <string.h>
#include <math.h>
@ -905,46 +905,26 @@ static Bitu INT74_Handler(void) {
return CBRET_NONE;
}
void WriteMouseIntVector(void)
{
// Create a mouse vector with weird address
// for strange mouse detection routines in Sim City & Wasteland
real_writed(0,0x33<<2,RealMake(CB_SEG+1,(call_int33<<4)-0x10+1)); // +1 = Skip NOP
};
void CreateMouseCallback(void)
{
// Create callback
call_int33=CALLBACK_Allocate();
CALLBACK_Setup(call_int33,&INT33_Handler,CB_IRET,"Mouse");
// Create a mouse vector with weird address
// for strange mouse detection routines in Sim City & Wasteland
Bit16u ofs = call_int33<<4;
phys_writeb(CB_BASE+ofs+0,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+ofs+1,(Bit8u)0xFE); //GRP 4
phys_writeb(CB_BASE+ofs+2,(Bit8u)0x38); //Extra Callback instruction
phys_writew(CB_BASE+ofs+3,call_int33); //The immediate word
phys_writeb(CB_BASE+ofs+5,(Bit8u)0xCF); //An IRET Instruction
// Write weird vector
WriteMouseIntVector();
};
void MOUSE_Init(Section* sec) {
// Callback 0x33
CreateMouseCallback();
// Callback for mouse interrupt 0x33
call_int33=CALLBACK_Allocate();
CALLBACK_Setup(call_int33,&INT33_Handler,CB_IRET,"Mouse");
// Wasteland needs low(seg(int33))!=0 and low(ofs(int33))!=0
real_writed(0,0x33<<2,RealMake(CB_SEG+1,(call_int33<<4)-0x10));
// Callback for ps2 irq
call_int74=CALLBACK_Allocate();
CALLBACK_Setup(call_int74,&INT74_Handler,CB_IRET,"int 74");
if(MOUSE_IRQ > 7) {
real_writed(0,((0x70+MOUSE_IRQ-8)<<2),CALLBACK_RealPointer(call_int74));
} else {
real_writed(0,((0x8+MOUSE_IRQ)<<2),CALLBACK_RealPointer(call_int74));
}
Bit8u hwvec=(MOUSE_IRQ>7)?(0x70+MOUSE_IRQ-8):(0x8+MOUSE_IRQ);
RealSetVec(hwvec,CALLBACK_RealPointer(call_int74));
// Callback for ps2 user callback handling
useps2callback = false; ps2callbackinit = false;
call_ps2=CALLBACK_Allocate();
CALLBACK_Setup(call_ps2,&PS2_Handler,CB_IRET,"ps2 bios callback");
ps2_callback=CALLBACK_RealPointer(call_ps2);
memset(&mouse,0,sizeof(mouse));
mouse.shown=-1; //Hide mouse on startup
mouse_reset_hardware();