_bios_equiplist

raw OCR

Checks equipment.

Defined in header <bios.h>

Syntax

#include <bios.h>
unsigned _bios_equiplist(void);

Portability

DOS	UNIX	Windows	ANSI C	C++ only
■		■

Remarks

_bios_equiplist uses BIOS interrupt 0x11 to return an integer describing the equipment connected to the system.

Return value

The return value is interpreted as a collection of bit-sized fields. The IBM PC values follow:

Bits 14-15	Number of parallel printers installed 00 = 0 printers 01 = 1 printer 10 = 2 printers 11=3 printers
Bit 13	Serial printer attached
Bit 12	Game I/O attached

DOS only sees two

Bits 9-11	Number of COM ports

ports but can be

000 = 0 ports

pushed to see four;

001 = 1 port

the IBM PS/2 can

010 = 2 ports

see up to eight.

Oil =3 ports 100 = 4 ports 101 = 5 ports 110 = 6 ports 111 =7 ports

Bits	Direct memory access (DMA) 0 = Machine has DMA 1 = Machine does not have DMA; for example, PC Jr.
Bits 6-7	Number of disk drives 00 = 1 drive 01 = 2 drives 10 = 3 drives 11=4 drives, only if bit 0 is 1

Bit 4-5	Initial video mode 00 = Unused 01 = 40x25 BW with color card 10 = 80x25 BW with color card 11 = 80x25 BW with mono card
Bits 2-3	Motherboard RAM size 00 = 16K 01 = 32K 10 = 48K 11 = 64K
Biti	Hoating-point coprocessor
BitO	Boot from disk

Example

#include <stdio.h>
#include <bios.h>
ttdefine CO PROCESSOR MASK 0x0002
int main(void)
{
   unsigned equip_check;

   /* Get the current equipment  configuration. */
   equip_check = _bios_equiplist ();

   /* Check to see if there is a  coprocessor installed. */
   if (equip_check & CO_PROCESSOR_MASK)
      printf("There is a math coprocessor  installed.\n");
   else
      printf("No math coprocessor  installed.\n");
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/bios.h/_bios_equiplist/ · short form /3.1/_bios_equiplist/