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/*
** ISXKBRD.C - public domain by Ed Kowalski.
**
** isxkeybrd() - detects enhanced kbd
*/
#include <dos.h>
/*
** Check for enhanced keyboard support.
*/
int isxkeybrd(void)
{
union REGS rg;
unsigned kbdflags;
rg.h.ah = 0x02; /* check BIOS supports enhanced kbd */
int86(0x16, &rg, &rg); /* get kbd flags */
kbdflags = rg.h.al;
/* mess 'em up, get enhanced flags */
rg.x.ax = 0x1200 + kbdflags ^ 0xff;
int86(0x16, &rg, &rg);
if (rg.h.al == kbdflags) /* BIOS supports enhanced keyboard */
{
/* if bit 4 at 40:96h is set machine has an enhanced kbd */
if ((*(( char far *) 0x400096L) & 0x10))
return 1; /* enhanced keyboard present */
}
return 0; /* don't use enhanced keyboard calls */
}
#ifdef TEST
#include <stdio.h>
main()
{
if (isxkeybrd())
puts( "Enhanced Keyboard supported" );
else puts( "Enhanced Keyboard NOT supported ");
return 0;
}
#endif /* TEST */
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