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Groups > alt.lang.asm > #6773

Re: MS-DOS utility to distinguish between standard & enhanced

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On Wed, 07 Dec 2016 07:18:08 -0000
"Kerr Mudd-John" <admin@127.0.0.1> wrote:

> On Sun, 04 Dec 2016 15:02:27 -0000, Steve <Bogus@embarq.com> wrote:
> > "Kerr Mudd-John" <admin@127.0.0.1> writes:

> >> It's mostly asm. Toggles a shift key then uses an extended
> >> keyboard call to see if it's changed.
> >> Should be easily rewritten in asm or ascii asm for use in batch.  
> >
> >    That seems more of a test to see if the BIOS supports extended  
> > keyboard
> > functions.  The memory byte at 40H:96H should indicate a 101
> > keyboard is attached if bit 4 is set.
> >  
> 
> org 0x100
> 
> mov ax,0x0040
> push ds
> pop ds
> mov bx,0x0096
> mov al,[bx]
> and al,0x00010000           ; bit 4

Wot?
(I'm following Frank's lead on "push ax".)

Don't mix hex and binary.

For hex, you'll want 0x10 for bit 4.
For binary, you'll want 00010000b for bit 4.


Rod Pemberton

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Re: MS-DOS utility to distinguish between standard & enhanced keyboard? "Kerr Mudd-John" <admin@127.0.0.1> - 2016-12-03 19:50 +0000
  Re: MS-DOS utility to distinguish between standard & enhanced Bogus@Embarq.com (Steve) - 2016-12-04 15:02 +0000
    Re: MS-DOS utility to distinguish between standard & enhanced Donald G. Davis <dgdavis@blackhole.nyx.net> - 2016-12-05 19:19 +0000
      Re: MS-DOS utility to distinguish between standard & enhanced Bogus@Embarq.com (Steve) - 2016-12-06 15:59 +0000
        Re: MS-DOS utility to distinguish between standard & enhanced Donald G. Davis <dgdavis@blackhole.nyx.net> - 2016-12-08 20:38 +0000
    Re: MS-DOS utility to distinguish between standard & enhanced "Kerr Mudd-John" <admin@127.0.0.1> - 2016-12-07 07:18 +0000
      Re: MS-DOS utility to distinguish between standard & enhanced "Kerr Mudd-John" <admin@127.0.0.1> - 2016-12-07 07:19 +0000
      Re: MS-DOS utility to distinguish between standard & enhanced Frank Kotler <fbkotler@myfairpoint.net> - 2016-12-07 09:24 -0500
        Re: MS-DOS utility to distinguish between standard & enhanced "Kerr Mudd-John" <admin@127.0.0.1> - 2016-12-08 11:58 +0000
          Re: MS-DOS utility to distinguish between standard & enhanced Frank Kotler <fbkotler@myfairpoint.net> - 2016-12-08 11:49 -0500
            Re: MS-DOS utility to distinguish between standard & enhanced Melzzzzz <mel@zzzzz.com> - 2016-12-08 20:37 +0100
              Re: MS-DOS utility to distinguish between standard & enhanced JJ <jj4public@vfemail.net> - 2016-12-09 06:22 +0700
                Re: MS-DOS utility to distinguish between standard & enhanced Donald G. Davis <dgdavis@blackhole.nyx.net> - 2016-12-10 04:53 +0000
      Re: MS-DOS utility to distinguish between standard & enhanced Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2016-12-07 19:52 -0500

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