A86: Re: external strings

To: assembly-86@lists.ticalc.org
Subject: A86: Re: external strings
From: rabidcow@juno.com (Joshua J Seagoe)
Date: Wed, 23 Sep 1998 22:08:31 -0700
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <01a001bde672$bad01060$5e10e6a5@sammy.rutgers.edu>
Reply-To: assembly-86@lists.ticalc.org

On Tue, 22 Sep 1998 17:48:25 -0400 "Dux Gregis" <assets@eden.rutgers.edu>
writes:
>
>/ ex de,hl>.  <call $4c3f> will increment ahl twice so that ahl points 

i believe that $4c3f is inefficient (time-wise) because it's on a
different page than _inc_ptr_ahl.  it's better to just call _inc_ptr_ahl
twice.
calling an off-page rom call takes 354 clocks.  most page d calls take 27
extra as well.
calling _inc_ptr_ahl twice would take 762 clocks in page switching, etc.
calling $4c3f uses 1089.
so, that's a difference of 327 clocks.  of course, you also save a huge 3
bytes!

ok, maybe none of you care.  i just think it's a bit wasteful.

-josh

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