Re: A85: What's wrong with this code

To: assembly-85@lists.ticalc.org
Subject: Re: A85: What's wrong with this code
From: mgp4007@omega.uta.edu (Michael Pearce)
Date: Wed, 13 May 1998 21:16:43 GMT
Delivered-To: assembly-85-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <19980513.152247.9430.1.egillespie@juno.com>
References: <19980512.182942.19414.0.egillespie@juno.com> <3559084e.14321903@omega.uta.edu> <19980513.152247.9430.1.egillespie@juno.com>
Reply-To: assembly-85@lists.ticalc.org


use the '&' for any relative address in the program.  a relative
address is one that resides somewhere inside the code (like a .db or a
function label).  in zshell, you had to add the program address.
anytime the address is an absolute address (where you write the exact
location of the address in memory, such as TEXT_MEM is ALWAYS = $80DF
or call's to functions in the ROM or the OS) you don't need to use an
'&'.

InitClipping:
   ld    a, (SomeByte)
   ld    hl, ClipLeft
   ld    b, 4
   CALL_(SplitByte)

becomes:

InitClipping:
   ld    a, (&SomeByte)
   ld    hl, ClipLeft
   ld    b, 4
   call  &SplitByte
   ld

-mike pearce

References:

A85: What's wrong with this code

From: egillespie@juno.com (Erik L Gillespie)

Re: A85: What's wrong with this code

From: mgp4007@omega.uta.edu (Michael Pearce)

Re: A85: What's wrong with this code

From: egillespie@juno.com (Erik L Gillespie)