Re: A83: How about??

To: assembly-83@lists.ticalc.org
Subject: Re: A83: How about??
From: LGB240 <LGB240@aol.com>
Date: Fri, 22 May 1998 07:26:03 EDT
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-83@lists.ticalc.org


In a message dated 98-05-22 07:14:17 EDT, you write:

There is already programs that do this on the 83.  ZPROT and ZUNPROT.
> I figure this is posible but I was wondering what you guys thought of. A
>  program that protects and unprotects a program. I think for protecting
>  programs you change one of the first bytes from 05h to 06h, and vice versa
>  to unprotect a program. Now the only problem of this idea is how you chande
>  it. Can you find the memory adress of this byte and then do something like
>  this...
>          ld (hl), 05h
>  If someone can confirm this I might actually get off my butt and make it.
>  From
>                            ''~``
>                          ( o o )
>    ____.oooO__(_)__Oooo.____
>   /  Steven Conway                         \
>  [                                                        ]
>  [   Conway@ssc.net.au                 ]
>  [  (   )                                                ]
>   \__\ (____(   )______________/
>         \_)        ) /
>                   (_/
>  
>

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