From: Speed <speed AT remove-this DOT linux DOT dpilink DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: keyboard problem!
Date: Tue, 02 Dec 1997 19:44:46 -0800
Organization: Erol's Internet Services
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Yes, but don't forget that each key emits a code when pressed, and
another code when released.  The keyup code is the (keydown code + 128),
for anyone who was not aware. 

- Mark


Walter Luke wrote:
> 
> Paul Cartwright wrote:
> 
> > does anyone know an algorithm that will get the scan code from a
> > pressed key?
> 
>    The procedure below will gets the scan code from a pressed key, and
> prints it to screen if it's not in the normal character set (i.e. if
> it's something strange like the arrow keys). I hope this helps...
> 
> #include "dos.h"
> #include "stdio.h"
> 
> char y;
> 
> getkey(void) {
> 
> union REGS r;
> 
> r.h.ah = 0;
> return int86(0x16, &r, &r);
> 
> }
> 
> main() {
> 
>         union scan {
>           int c;
>           char ch[2];
>         } sc;
> 
>         do {
>           sc.c=getkey();
>           if(sc.ch[0]==0)
>             printf("special key number %d \n", sc.ch[1]);
>           else
>             {
>             putchar(sc.ch[0]);
>             printf("\n");
>             }
>         } while(sc.ch[0]!='q');
> 
>        }
> 
> --
> Walter Luke aka "Night Watchman"
> 
> mailto:NightWatchman AT Sacrilege DOT com
> Visit Shadows at http://shadows.sacrilege.com