Groups > comp.os.msdos.programmer > #4088

How to access stack-based data (strings) when SS <> DS ?

From	"R.Wieser" <address@not.available>
Newsgroups	comp.os.msdos.programmer
Subject	How to access stack-based data (strings) when SS <> DS ?
Date	2021-12-04 08:56 +0100
Organization	Aioe.org NNTP Server
Message-ID	<sof888$9ts$3@gioia.aioe.org> (permalink)

Show all headers | View raw

Hello all,

As an assembly programmer I never needed to write *big* programs, and 
therefore always used the "tiny" memory model where CS = DS = SS.

Though at some point I realized that not having SS equal to DS creates its 
own problems - when trying to access stack-based data (strings).

A "lea dx,[Stack-based item]" will work, but, for example, using it with 
"mov ah,09h", "int 21h" will ofcourse fail, as DX is not pointing into DS.

My question :
Does anyone know how this is solved ?   Other than (manually!) wrapping all 
such calls in a "push ds", "mov ax,ss", "mov ds,ax" .... "pop ds" sequences 
I mean.

Regards,
Rudy Wieser

Back to comp.os.msdos.programmer | Previous | Next — Next in thread | Find similar

Thread

How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-04 08:56 +0100
  Re: How to access stack-based data (strings) when SS <>  DS ? "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-04 12:47 +0000
    Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-04 15:57 +0100
      Re: How to access stack-based data (strings) when SS <>  DS ? "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-04 16:13 +0000
        Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-04 18:41 +0100
          Re: How to access stack-based data (strings) when SS <>  DS ? "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-04 20:28 +0000
            Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-05 08:56 +0100
              Re: How to access stack-based data (strings) when SS <>  DS ? "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-05 10:32 +0000
                Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-05 13:11 +0100
                Re: How to access stack-based data (strings) when SS <>  DS ? "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-05 12:21 +0000
                Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-05 14:59 +0100
        Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-04 19:00 +0100
  Re: How to access stack-based data (strings) when SS <>  DS ? JJ <jj4public@gmail.com> - 2021-12-05 14:27 +0700
    Re: How to access stack-based data (strings) when SS <>  DS ? "R.Wieser" <address@not.available> - 2021-12-05 12:43 +0100
  Re: How to access stack-based data (strings) when SS <> DS ? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2021-12-05 22:25 -0800
    Re: How to access stack-based data (strings) when SS <> DS ? Mateusz Viste <mateusz@xyz.invalid> - 2021-12-06 09:30 +0100
    Re: How to access stack-based data (strings) when SS <> DS ? "R.Wieser" <address@not.available> - 2021-12-06 14:33 +0100
      Re: How to access stack-based data (strings) when SS <> DS ? Herbert Kleebauer <klee@unibwm.de> - 2021-12-06 19:01 +0100
        Re: How to access stack-based data (strings) when SS <> DS ? "R.Wieser" <address@not.available> - 2021-12-06 21:16 +0100
          Re: How to access stack-based data (strings) when SS <> DS ? Herbert Kleebauer <klee@unibwm.de> - 2021-12-07 00:19 +0100
            Re: How to access stack-based data (strings) when SS <> DS ? Mateusz Viste <mateusz@xyz.invalid> - 2021-12-07 09:31 +0100
            Re: How to access stack-based data (strings) when SS <> DS ? "R.Wieser" <address@not.available> - 2021-12-07 09:37 +0100
            Re: How to access stack-based data (strings) when SS <> DS ?   Newbie language. "R.Wieser" <address@not.available> - 2021-12-08 10:16 +0100
              Re: How to access stack-based data (strings) when SS <> DS ? Newbie language. Herbert Kleebauer <klee@unibwm.de> - 2021-12-08 17:39 +0100
                Re: How to access stack-based data (strings) when SS <> DS ? Newbie language. "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-08 17:37 +0000
                Re: How to access stack-based data (strings) when SS <> DS ? Newbie language. Herbert Kleebauer <klee@unibwm.de> - 2021-12-08 22:31 +0100
                Re: How to access stack-based data (strings) when SS <> DS ? Newbie language. "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-12-09 21:43 +0000
                Re: How to access stack-based data (strings) when SS <> DS ? Newbie language. "R.Wieser" <address@not.available> - 2021-12-08 22:19 +0100
      Re: How to access stack-based data (strings) when SS <> DS ? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2021-12-06 22:40 -0800
        Re: How to access stack-based data (strings) when SS <> DS ? "R.Wieser" <address@not.available> - 2021-12-07 10:17 +0100

csiph-web