mirror of
https://github.com/reactos/wine.git
synced 2024-12-12 13:56:38 +00:00
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
|
|
* BIOS interrupt 11h handler
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "miscemu.h"
|
|
#include "msdos.h"
|
|
#include "drive.h"
|
|
#include "debugtools.h"
|
|
|
|
/**********************************************************************
|
|
* INT_Int11Handler
|
|
*
|
|
* Handler for int 11h (get equipment list).
|
|
*/
|
|
void WINAPI INT_Int11Handler( CONTEXT86 *context )
|
|
{
|
|
int diskdrives = 0;
|
|
int parallelports = 0;
|
|
int serialports = 0;
|
|
int x;
|
|
|
|
/* borrowed from Ralph Brown's interrupt lists
|
|
|
|
bits 15-14: number of parallel devices
|
|
bit 13: [Conv] Internal modem
|
|
bit 12: reserved
|
|
bits 11- 9: number of serial devices
|
|
bit 8: reserved
|
|
bits 7- 6: number of diskette drives minus one
|
|
bits 5- 4: Initial video mode:
|
|
00b = EGA,VGA,PGA
|
|
01b = 40 x 25 color
|
|
10b = 80 x 25 color
|
|
11b = 80 x 25 mono
|
|
bit 3: reserved
|
|
bit 2: [PS] =1 if pointing device
|
|
[non-PS] reserved
|
|
bit 1: =1 if math co-processor
|
|
bit 0: =1 if diskette available for boot
|
|
*/
|
|
/* Currently the only of these bits correctly set are:
|
|
bits 15-14 } Added by William Owen Smith,
|
|
bits 11-9 } wos@dcs.warwick.ac.uk
|
|
bits 7-6
|
|
bit 2 (always set)
|
|
*/
|
|
|
|
if (DRIVE_IsValid(0)) diskdrives++;
|
|
if (DRIVE_IsValid(1)) diskdrives++;
|
|
if (diskdrives) diskdrives--;
|
|
|
|
for (x=0; x!=MAX_PORTS; x++)
|
|
{
|
|
if (COM[x].devicename)
|
|
serialports++;
|
|
if (LPT[x].devicename)
|
|
parallelports++;
|
|
}
|
|
if (serialports > 7) /* 3 bits -- maximum value = 7 */
|
|
serialports=7;
|
|
if (parallelports > 3) /* 2 bits -- maximum value = 3 */
|
|
parallelports=3;
|
|
|
|
AX_reg(context) = (diskdrives << 6) | (serialports << 9) |
|
|
(parallelports << 14) | 0x02;
|
|
}
|