SuperEGA REV 3.0

TwinHead CT-8290  SEGA

higher end EGA that can automatically, on software demand,

fall back to CGA, Hercules, MGC

CHIPS P82C435 / P82C436 GPU chipset

 with the full 256K RAM installed

works in 8-bit computers such as IBM PC 5150 and PC/XT 5160

not for the IBM Portable 5155

supports 25MHz, as well as all other CGA and EGA monitors

it is very doubtful that this card supplies any type of composite output

this is a higher end EGA card that was made in 1988,

and is the most promising Super-EGA card ever made

Although this card is very well designed and feature-heavy

we are selling it primarily for eclectic collectors

because it is a very very rare version

it may be a early version that was supplied to a local 

software developer for consideration

The neat thing about this card is that it has a socket for 

a CHIPS  82C437 SharpScan chip (CHIP NOT INCLUDED)

that is an EGA-compatible graphics chip set capable of 1,128x560 line resolution !\

also of interest is the markings on the back that 

credit a CADtrak patent, CADtrack was a crazy company that 

made $1B+ by patent lawsuits and supposedly drove Commodore out of business!

(CADtrack was run by Jerome H. Lemelson)

this is a very very capable EGA card and it comes with a LOT of history!

It would take a year-long course to cover all the technology and history that is wrapped up in this card

PLEASE DON'T BUY THIS CARD UNLESS YOU ENJOY EXPLORING

IT IS SET FOR EGA BUT WE DO NOT KNOW WHAT ANY JUMPERS OR SWITCHES DO

https://worldradiohistory.com/Archive-Electronics/80s/87/Electronics-1987-07-09.pdf

CHIPS AND TECHNOLOGIES' ICs INCREASE EGA GRAPHICS RESOLUTION TO 1,128x560 PIXELS

The 82C437 SharpScan delivers 1,128-by-560-pixel resolution while still retaining 100% compatibility with the 640-by350-pixel Enhanced Graphics Adapter standard from IBM. It uses a proprietary pixel-multiplexing function that enables users to trade off the number of colors available—four instead of the normal 16—for higher resolution, says Gordon Campbell, president of Chips and Technologies.

EGA COMPATIBLE. Using the chip in an EGA chip set means that up to 300% more information can be presented on the screen than present EGA standards allow, he says. Additional software or setup changes to regular EGA monitors are not required.  Users can switch back and forth between high-resolution and normal EGA operation, depending on their application requirements. Because the new chip incorporates on-chip video drivers that were previously implemented externally with the Chips and Technologies EGA implementation, the total chip count for complete EGA implementation remains at 13—the lowest number in any  configuration currently available, says Campbell.

USED but in good condition.   WORKING.