Path: utzoo!attcan!uunet!husc6!m2c!wpi!dseah From: dseah@wpi.wpi.edu (David I Seah) Newsgroups: comp.sys.apple Subject: Re: Lack of games for the GS Message-ID: <8916@wpi.wpi.edu> Date: 22 Feb 90 16:54:07 GMT References: <1580@crash.cts.com> <8776@wpi.wpi.edu> Reply-To: dseah@wpi.wpi.edu (David I Seah) Organization: Worcester Polytechnic Institute, Worcester ,MA Lines: 20 In article gt0t+@andrew.cmu.edu (Gregory Ross Thompson) writes: [My stuff wiped] > What is this HAM mode? How does it work? How did ACS do it in one >of their demos? Feh...HAM stands for "Hold and Modify", and works by changing the previously drawn pixel value by the contents of the next pixel. When you are changing from one hue to a wildly different one, you'll get nasty color glitches. Carefully designed screens can get around this. Theoretically, you can display all 4096 colors, but it's my guess that you'll get the same or better results with a 640x400x256 color mode WITHOUT the color glitches. The "HAM" mode on the ACS demo is bogus...they only show 32 "grays" on the right side of the screen. I think they are doing it by switching between two palettes on every frame so that your eye averages out the difference into a "in between" gray. Nothing like HAM. Maybe they called it that because it flickers :) -- Dave Seah | O M N I D Y N E S Y S T E M S - M | Internet: dseah@wpi.wpi.edu | User Friendly Killing Machines | America Online: AFC DaveS