Re: A86: Hiding Programs

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Hiding Programs
From: Ben Mickle <bmickle@yahoo.com>
Date: Sat, 24 Apr 1999 05:33:20 -0700 (PDT)
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org




--- Chris Phelps <chicane@reninet.com> wrote:
> 
> >If the first character of a program is less than
> 'A',
> >then it is not detected by any shells or the os. 
> To
> >hide a program like this, use this routine (it
> isn't
> >tested):
> 
> Eh...Not exactly.
> MSE, ASE, YAS, and most others will detect this
> program ($00,"rog").
> As I am the author of MSE/ZAP-OS, i can tell you
> that neither will detect
> programs that start with [sqrt],'!','#',or 'mse'.

You're right :-) Just change the ld (hl),0 to ld
(hl),'!'

> 
> > ld hl,progname-1
> > rst 20h
> > rst 10h
> 
> ld	a,b
> ex	de,hl
> 
> > ld de,6
> > add hl,de    ;point hl to first character in VAT
> > ld (hl),0
> >
> >progname:
> > .db 4,"prog"     ;length followed by name
> >
> >This routine changes the program's name to:
> > .db 0,"rog"
> >
> Actually, its .db $04,$00,"rog"
> 
> 
> Chicane
> chicane@reninet.com
> http://zapo.calc.org
> 
> 
> 

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