Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84 (Fortune 01.1b1); site graffiti.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!qantel!dual!lll-crg!seismo!ut-sally!ut-ngp!shell!graffiti!peter From: peter@graffiti.UUCP (Peter da Silva) Newsgroups: net.micro.pc Subject: Re: New color card: 256 colors on a PC! Message-ID: <242@graffiti.UUCP> Date: Tue, 24-Sep-85 18:21:25 EDT Article-I.D.: graffiti.242 Posted: Tue Sep 24 18:21:25 1985 Date-Received: Sun, 29-Sep-85 05:41:36 EDT References: <7700013@prism.UUCP> <372@bbncc5.UUCP> Organization: The Power Elite, Houston, TX Lines: 18 > No, on a color composite video monitor or analog RGB display. It's > impossible to display more than 16 colors on an IBM-CGA-compatible > monitor or 64 colors on an Enhanced Color Display: the RGB signals > are digital, not analog, and there are only 4 separate inputs > (or 6, for the ECD). Infoworld, Sep 16 1985: A new graphics board from a division of AT&T lets standard IBM-PC color displays produce images with as many as 256 colors simultaneously, 32 times the existing limit... [it] overcomes the inherent limit in the current digital RGB monitor... "We're using a technique patented by Bell Labs several years ago to increase the number of colors. It's a form of pulse-width modulation that tricks the monitor into thinking it has more than 1 level for each component." The board is called the VDAD, for Visual Display Adapter/Digital.