Re: A82: saving hl

To: assembly-82@lists.ticalc.org
Subject: Re: A82: saving hl
From: Barubary <darkstar_usa@pipeline.com>
Date: Fri, 10 Apr 1998 16:25:43 -0700
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-82@lists.ticalc.org


>you could use this instead:
>.dw $0

Use self-modifying code.  It's pretty simple to do.  Change ONE of
the load HLs with (save) to save: ld hl,0.  Then change all the
(save)s to (save+1).  Example below.

Change this:

ld (save),hl
...
ld hl,(save)
...
ld hl,(save)
...
ld (save),hl

To this (note that changing ANY ld hl,(save) is alright):

ld (save+1),hl
...
save:
ld hl,0
...
ld hl,(save+1)
...
ld (save),hl


This only works with ld de,... ld hl,... and ld bc,...

-- Barubary

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