Re: A86: Hiding Programs

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Hiding Programs
From: "JBrett" <tbarwick@esn.net>
Date: Fri, 23 Apr 1999 17:04:02 -0700
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org


>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):
>
> ld hl,progname-1
> rst 20h
> rst 10h

call _FINDSYM returns the pointer to the absolute address in bde, not ahl...
so first, you'd have to do:
ex hl,de
ld a,b
to get the pointer into ahl...

> ld de,6

I'm not sure how many type bytes there are in a program variable at the
moment... so I'm guessing this is correct...

> add hl,de    ;point hl to first character in VAT
> ld (hl),0

   ret =)
_________
JBrett
tbarwick@esn.net - http://brett.acz.org
ICQ UIN: 20607010
AIM: BarwickBJ
ACZ member - http://www.acz.org

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