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Handle errant IRQs as a real BIOS does. Fixes Tandy DAC in Chuck Yeager's Air Combat. Also remove r3263 workaround, as it's no longer needed.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4009
This commit is contained in:
ripsaw8080 2017-05-01 15:32:29 +00:00
parent 97bb6e4127
commit d6e983b08d
3 changed files with 34 additions and 4 deletions
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5
src/cpu/callback.cpp
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@ -33,7 +33,7 @@
CallBack_Handler CallBack_Handlers[CB_MAX];
char* CallBack_Description[CB_MAX];
static Bitu call_stop,call_idle,call_default,call_default2;
static Bitu call_stop,call_idle,call_default;
Bitu call_priv_io;
static Bitu illegal_handler(void) {
@ -575,8 +575,6 @@ void CALLBACK_Init(Section* /*sec*/) {
/* Default handlers for unhandled interrupts that have to be non-null */
call_default=CALLBACK_Allocate();
CALLBACK_Setup(call_default,&default_handler,CB_IRET,"default");
call_default2=CALLBACK_Allocate();
CALLBACK_Setup(call_default2,&default_handler,CB_IRET,"default");
/* Only setup default handler for first part of interrupt table */
for (Bit16u ct=0;ct<0x60;ct++) {
@ -597,7 +595,6 @@ void CALLBACK_Init(Section* /*sec*/) {
}
// setup a few interrupt handlers that point to bios IRETs by default
real_writed(0,0x0e*4,CALLBACK_RealPointer(call_default2)); //design your own railroad
real_writed(0,0x66*4,CALLBACK_RealPointer(call_default)); //war2d
real_writed(0,0x67*4,CALLBACK_RealPointer(call_default));
real_writed(0,0x68*4,CALLBACK_RealPointer(call_default));