[A83] Re: Flash Apping + Menu ROutine

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Flash Apping + Menu ROutine
From: Patai Gergely <patai.ti@freemail.hu>
Date: Sun, 28 Apr 2002 21:56:53 +0200 (CEST)
In-Reply-To: <F228FaukyCKDkb9pPFR00002e8e@hotmail.com>
Reply-To: assembly-83@lists.ticalc.org


> Could you explain to me what exactly is selfmodifying 
code?
> 
Code that changes itself while running. Like:

 ld a,10
 ld (LABEL+1),a
 ...

LABEL:
 ld b,20    ; this will be modified to "ld b,10" by the
            ; load above

Of course the instructions themselves can also be replaced,
not only just numerical data. If, for instance, I had 
written "ld a,$76 \ ld (LABEL),a" then the original "ld 
b,20" would be interpreted as "halt \ inc d" when the 
program counter arrives there.

PG

References:

[A83] Re: Flash Apping + Menu ROutine

From: "Maarten Z." <m021085@hotmail.com>

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