Re: A86: Many Stupid Questions

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Many Stupid Questions
From: David Phillips <electrum@tfs.net>
Date: Wed, 19 Aug 1998 03:19:05 -0500
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <7bdbf3c0.35da70c7@aol.com>
Reply-To: assembly-86@lists.ticalc.org


Usually, grayscale accomplished by using port 0 to change the address of
video memory.  This is much better than actually turning the pixels on and
off 200 times a second, because it flickers less and uses less CPU time.

>No, the contrast is a hardware method of managing the amount
>of power going to the screen.  It is not possible to differentiate
>between pixels, using hardware or software.  If you want gray
>pixels, you have to use a grayscale routine (which works by
>flipping the pixels on and off a few dozen (or 200) times a second).


--
David Phillips
mailto:electrum@tfs.net
ICQ: 13811951
AOL/AIM: Electrum32

References:

Re: A86: Many Stupid Questions

From: TGaArdvark@aol.com

Prev: Re: A86: Many Stupid Questions
Next: A86: Compressing pictures
Index(es):
- Main
- Thread