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Added a multiplex handler for 0x1680 for dos programs to give up their time slice

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@362
This commit is contained in:
Sjoerd van der Berg 2002-10-19 17:27:28 +00:00
parent 85f1ac7d9e
commit 35cfe5d5c7
1 changed files with 11 additions and 0 deletions
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11
src/dos/dos_misc.cpp
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@ -54,6 +54,16 @@ static Bitu INT2A_Handler(void) {
return CBRET_NONE;
};
static bool DOS_MultiplexFunctions(void) {
switch (reg_ax) {
case 0x1680: /* RELEASE CURRENT VIRTUAL MACHINE TIME-SLICE */
//TODO Maybe do some idling but could screw up other systems :)
reg_al=0;
return true;
}
return false;
}
void DOS_SetupMisc(void) {
/* Setup the dos multiplex interrupt */
@ -61,6 +71,7 @@ void DOS_SetupMisc(void) {
call_int2f=CALLBACK_Allocate();
CALLBACK_Setup(call_int2f,&INT2F_Handler,CB_IRET);
RealSetVec(0x2f,CALLBACK_RealPointer(call_int2f));
DOS_AddMultiplexHandler(DOS_MultiplexFunctions);
/* Setup the dos network interrupt */
call_int2a=CALLBACK_Allocate();
CALLBACK_Setup(call_int2a,&INT2A_Handler,CB_IRET);