Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site tektronix.UUCP
Path: utzoo!linus!decvax!tektronix!davec
From: davec@tektronix.UUCP (Dave Clemans)
Newsgroups: net.micro.cbm
Subject: VIC-20 Graphics
Message-ID: <1392@tektronix.UUCP>
Date: Thu, 22-Sep-83 13:35:51 EDT
Article-I.D.: tektroni.1392
Posted: Thu Sep 22 13:35:51 1983
Date-Received: Fri, 23-Sep-83 04:51:25 EDT
Organization: Tektronix, Beaverton OR
Lines: 17

Does anyone know how to get graphics out of a VIC-20 without buying CBM's Super
Expander Cartridge???  I can't quite figure out how it's done...  The Super
Expander has a resolution of 160x160 pixels.  Each character cell is 8x8, which
would require 20x20, or 400, unique characters when only 256 are possible with
8 bit data.  The Video Chip (a 6560, I think) has a 12 bit data bus, the upper
four used for color.  Are these possibly being used to increase the character
addressing to 9 bits???
If anyone knows the answer, I would appreciate hearing from you via mail.

							Thanx,

							Greg Muth

							   aka

   						    tektronix!gregorym