Xref: utzoo sci.electronics:20880 rec.games.video.arcade:1353 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!lll-winken!uop!quack!mrapple From: mrapple@quack.sac.ca.us (Nick Sayer) Newsgroups: sci.electronics,rec.games.video.arcade Subject: Analog RGB->NTSC ? Message-ID: Date: 13 Jun 91 20:45:35 GMT Followup-To: sci.electronics Organization: The Duck Pond, Stockton, CA Lines: 20 Followups-to: sci.electronics I've managed to obtain at a rediculously low price a motherboard for the grand old video game "Robotron: 2084". I know it generates analog R, G, and B signals, and separate TTL horizontal and verticle sync outputs. Fine and dandy. Setting aside for the moment concerns about losing definition, is there a way (I know it won't be easy) to convert this signal into an NTSC format? Monochrome will do, by the way. If not, all is not lost. I know that the Apple IIgs monitor is an Analog RGB monitor, but it needs a composite sync signal. My bright idea is to send the TTL H and V sync into the control pins of a pair of CD4066 "digital switch" elements, whose inputs attach to a pair of pots, and outputs connect together and go to the composite sync output. Will this plan work? -- Nick Sayer | Official Scapegoat for the | RIP: Mel Blanc mrapple@quack.sac.ca.us | MC68HC11 Mailing List. | 1908--1989 N6QQQ | To subscribe, send mail to | May he never 209-952-5347 (Telebit) | mc68hc11-request@quack.sac.ca.us | be silenced.