Visit the
Molecular Expressions Website

Photo Gallery
Silicon Zoo
Chip Shots
Screen Savers
Web Resources
Java Microscopy
Win Wallpaper
Mac Wallpaper
Custom Photos
Image Use
Contact Us

Integrated Circuit Image Gallery

Weitek 91460 Graphics Processor

The Weitek 91460, released in 1992, was the "brains" behind some of the innovative graphics abilities displayed by the Commodore Amiga. Assisted with 2 Mbytes of memory, Ameristar Technologies featured the 91460 chip on their Model 1600GX graphics adapter card.

View a medium magnification image of the Weitek 91460 processor.

View a high magnification image of the Weitek 91460 processor.

Ameristar's 1600GX graphics adapter card featured the Zorro III bus and met Amiga's then-brand-new RTG graphics standard. An acronym for ReTargetable Graphics, RTG was an Amiga-specific true color standard that allowed processors to direct output from any graphics chipset to a monitor, a big step for computers at the time. The card had programmable resolutions from 640 x 480 pixels up to 1600 x 1280 pixels for non-interlaced video based on 256 colors from a 24-bit palette. Connectors included both BNC (British Naval Connector or Bayonet Nut Connector) and VGA (video graphics array) standards.

The Weitek 91460, an 8-bit chip, featured a 180-MHz dot clock, 100 million pixels, 2 Mbytes random-access memory, and 16 ZIP screen modes. Weitek went out of business in 1997, but was absorbed into the Brooktree Division of Rockwell Semiconductor, which survives as an independent spin-off, Conexant Systems. Although no longer manufactured, Commodore Amigas still capture some retro aficionados' hearts and minds.

Contributing Authors

Omar Alvarado, Thomas J. Fellers and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310.



Questions or comments? Send us an email.
© 1995-2021 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last Modification Friday, Nov 13, 2015 at 02:19 PM
Access Count Since September 17, 2002: 10012
Visit the website of our partner in introductory microscopy education: