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Technotools (Chestnut CD-ROM)(1993).ISO
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msqc25t1
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sysinfo.c
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C/C++ Source or Header
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1990-09-08
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3KB
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79 lines
/* SYSINFO.C illustrates miscellaneous DOS and BIOS status functions
* including:
* _dos_getdrive _dos_setdrive _dos_getdiskfree
* _bios_memsize _bios_equiplist _bios_printer
*
* See DISK.C for another example of _dos_getdiskfree.
*
* Also illustrated:
* union bitfield struct
*/
#include <dos.h>
#include <bios.h>
#include <conio.h>
#include <stdio.h>
#define LPT1 0
void main()
{
struct diskfree_t drvinfo;
unsigned drive, drivecount, memory, pstatus;
union
{ /* Access equiment either as: */
unsigned u; /* unsigned or */
struct /* bit fields */
{
unsigned diskflag : 1; /* Diskette drive installed? */
unsigned coprocessor : 1; /* Coprocessor? (except on PC) */
unsigned sysram : 2; /* RAM on system board */
unsigned video : 2; /* Startup video mode */
unsigned disks : 2; /* Drives 00=1, 01=2, 10=3, 11=4 */
unsigned dma : 1; /* 0=Yes, 1=No (1 for PC Jr.) */
unsigned comports : 3; /* Serial ports */
unsigned game : 1; /* Game adapter installed? */
unsigned modem : 1; /* Internal modem? */
unsigned printers : 2; /* Number of printers */
} bits;
} equip;
char y[] = "YES", n[] = "NO";
/* Get current drive. */
_dos_getdrive( &drive );
printf( "Current drive:\t\t\t%c:\n", 'A' + drive - 1 );
/* Set drive to current drive in order to get number of drives. */
_dos_setdrive( drive, &drivecount );
_dos_getdiskfree( drive, &drvinfo );
printf( "Disk space free:\t\t%ld\n",
(long)drvinfo.avail_clusters *
drvinfo.sectors_per_cluster *
drvinfo.bytes_per_sector );
/* Get new drive and number of logical drives in system. */
_dos_getdrive( &drive );
printf( "Number of logical drives:\t%d\n", drivecount );
memory = _bios_memsize();
printf( "Memory:\t\t\t\t%dK\n", memory );
equip.u = _bios_equiplist();
printf( "Disk drive installed:\t\t%s\n", equip.bits.diskflag ? y : n );
printf( "Coprocessor installed:\t\t%s\n", equip.bits.coprocessor ? y : n );
printf( "Game adapter installed:\t\t%s\n", equip.bits.game ? y : n );
printf( "Serial ports:\t\t\t%d\n", equip.bits.comports );
printf( "Number of printers:\t\t%d\n", equip.bits.printers );
/* Fail if any error bit is on, or if either operation bit is off. */
pstatus = _bios_printer( _PRINTER_STATUS, LPT1, 0 );
if( (pstatus & 0x29) || !(pstatus & 0x80) || !(pstatus & 0x10) )
pstatus = 0;
else
pstatus = 1;
printf( "Printer available:\t\t%s\n", pstatus ? y : n );
}