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add mouse driver backdoor entry point (enables mouse in Last half of Darkness, PC-BLOX)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2869
This commit is contained in:
Sebastian Strohhäcker 2007-06-03 16:46:33 +00:00
parent 432c61d1fa
commit 7859569c6d
3 changed files with 103 additions and 8 deletions
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24
src/cpu/callback.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: callback.cpp,v 1.36 2007-01-08 19:45:38 qbix79 Exp $ */
/* $Id: callback.cpp,v 1.37 2007-06-03 16:46:33 c2woody Exp $ */
#include <stdlib.h>
#include <string.h>
@ -155,6 +155,16 @@ Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress, bool use_
}
phys_writeb(physAddress+0x00,(Bit8u)0xCB); //A RETF Instruction
return (use_cb?5:1);
case CB_RETF8:
if (use_cb) {
phys_writeb(physAddress+0x00,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+0x01,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+0x02, callback); //The immediate word
physAddress+=4;
}
phys_writeb(physAddress+0x00,(Bit8u)0xCA); //A RETF 8 Instruction
phys_writew(physAddress+0x01,(Bit16u)0x0008);
return (use_cb?7:3);
case CB_IRET:
if (use_cb) {
phys_writeb(physAddress+0x00,(Bit8u)0xFE); //GRP 4
@ -300,6 +310,18 @@ Bitu CALLBACK_SetupExtra(Bitu callback, Bitu type, PhysPt physAddress, bool use_
phys_writeb(physAddress+0x0e,(Bit8u)0x58); // pop ax
phys_writeb(physAddress+0x0f,(Bit8u)0xcf); //An IRET Instruction
return (use_cb?0x14:0x10);
case CB_MOUSE:
phys_writew(physAddress+0x00,(Bit16u)0x07eb); // jmp i33hd
physAddress+=9;
// jump here to (i33hd):
if (use_cb) {
phys_writeb(physAddress+0x00,(Bit8u)0xFE); //GRP 4
phys_writeb(physAddress+0x01,(Bit8u)0x38); //Extra Callback instruction
phys_writew(physAddress+0x02,callback); //The immediate word
physAddress+=4;
}
phys_writeb(physAddress+0x00,(Bit8u)0xCF); //An IRET Instruction
return (use_cb?0x0e:0x0a);
case CB_INT16:
phys_writeb(physAddress+0x00,(Bit8u)0xFB); //STI
if (use_cb) {