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Path: utzoo!linus!decvax!harpo!eagle!allegra!alice!rabbit!ss
From: ss@rabbit.UUCP
Newsgroups: net.micro
Subject: Re: NEC color vector graphics chip
Message-ID: <2171@rabbit.UUCP>
Date: Fri, 4-Nov-83 10:53:35 EST
Article-I.D.: rabbit.2171
Posted: Fri Nov  4 10:53:35 1983
Date-Received: Mon, 7-Nov-83 00:37:30 EST
References: <13229@sri-arpa.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 25

The chip you are thinking about is the NEC uPD7220 (mu P D). It is
a Graphics Display Controller with some pretty features. It takes care
of the video display memory. Among other things it has
 : DMA transfers between system and display memory via 8257 or 8237 type
DMA controllers
 : Light pen input
 : Graphics and character modes (mixed or independent)
 : Independently scrollable areas on the screen
 : Line,arc,circles,rectangle drawing capability
 : Zoom and pan functions for graphics

They have an extensive Design manual for the chip. It was described in
more detail in the April 7,1981 issue of ELECTRONICS.

You can get more information from

NEC Electronics U.S.A. Inc.
Microcomputer Division
One Natick Executive Park
Natick, MA 01760

(617) 655-8833


Sharad Singhal