Re: A83: Grayscale

To: assembly-83@lists.ticalc.org
Subject: Re: A83: Grayscale
From: Olle Hedman <oh@hem.passagen.se>
Date: Wed, 28 Apr 1999 03:52:17 +0200
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-83@lists.ticalc.org
References: <6b7a546d.2457aa8f@aol.com>
Reply-To: assembly-83@lists.ticalc.org

If you should be 100% accurate, there _is_ a lcd driver in all calcs..  the
thing is that in the others the transition from mem to the screen is done
automaticly, but on the 83 you have to do it "manually", that is, the system
processor (the z80) has to do that work to...
not that it changes anything, but thats the way it is.. :)

//Olle

BJTkid@aol.com wrote:
> 
> Grayscale isn't possible except to a certain extent on the 83 because of the
> way things are taken from the calculator and put on the screen.. In other
> calculators, the screen is memory mapped, which means there is a section of
> memory that you can directly access that is basically displayed on the
> screen.. On the 83, however, there is an lcd driver.. and everything to be
> displayed has to first go to that driver

References:

A83: Grayscale

From: BJTkid@aol.com

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