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Fake PCI Bios Call

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Add detection of serial ports to be placed in bios data segment.


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@990
This commit is contained in:
Sjoerd van der Berg 2003-05-05 22:13:25 +00:00
parent bbb7cf45b0
commit 656ceb60fd
1 changed files with 14 additions and 3 deletions
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17
src/ints/bios.cpp
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@ -29,6 +29,9 @@ static Bitu call_int1a,call_int11,call_int8,call_int17,call_int12,call_int15,cal
static Bitu call_int1,call_int70;
static Bitu INT70_Handler(void) {
/* Acknowledge irq with cmos */
IO_Write(0x70,0xc);
IO_Read(0x71);
if (mem_readb(BIOS_WAIT_FLAG_ACTIVE)) {
Bits count=mem_readd(BIOS_WAIT_FLAG_COUNT);
if (count>997) {
@ -91,7 +94,11 @@ static Bitu INT1A_Handler(void) {
CF clear if sound chip is free
Note: the value of CF is not definitive; call this function until CF is
clear on return, then call AH=84h"Tandy"
*/
*/
case 0xb1: /* PCI Bios Calls */
LOG(LOG_BIOS,LOG_ERROR)("INT1A:PCI bios call %2X",reg_al);
CALLBACK_SCF(true);
break;
default:
LOG(LOG_BIOS,LOG_ERROR)("INT1A:Undefined call %2X",reg_ah);
}
@ -335,8 +342,12 @@ void BIOS_Init(Section* sec) {
CALLBACK_Setup(call_int1,&INT1_Single_Step,CB_IRET);
RealSetVec(0x1,CALLBACK_RealPointer(call_int1));
/* Test for some hardware */
if (IO_Read(0x378)!=0xff) real_writed(0x40,0x08,0x378);
/* Test for parallel port */
if (IO_Read(0x378)!=0xff) real_writew(0x40,0x08,0x378);
/* Test for serial port */
Bitu index=0;
if (IO_Read(0x3f8)!=0xff) real_writew(0x40,(index++)*2,0x3f8);
if (IO_Read(0x2f8)!=0xff) real_writew(0x40,(index++)*2,0x2f8);
}