Article View: comp.sys.atari.st
Article #26696Re: RGB to video composite for ATARI 1040/Mega ST computer.
From: Richard Andrews
Date: Thu, 07 May 1987 03:39
Date: Thu, 07 May 1987 03:39
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I did some genlock work on the 520/1040 ST machines and have discovered the following. When in external sync mode the 520/1040 does not produce hsync-subcarrier locked video. This causes a color banding effect on the screen. Depending on the version of GLUE the screen display may be either jumpy, 1/2 black, or 3/4 black when in the extrenal sync mode. The h-sync is missing equalization pulses, hence, no NTSC standard output. The composite output of the ST stinks. There is no delay line in the RGB to composite coverter (modulator) which causes this. There are other problems but they can be elimated quite easily. In short, unless Atari re-works GLUE or the system clock or both there can be no genlock. Richard Andrews Asst. Chief Engineer WCFC-TV Chicago -- ******************************************************************************* Any opinions expressed above are my own. Rich Andrews They can be yours too. Please send $19.95 to.....ihnp4!chinet!cabbie *******************************************************************************
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-lcc!styx!ames!ptsfa!ihnp4!chinet!cabbie From: cabbie@chinet.UUCP (Richard Andrews) Newsgroups: comp.sys.atari.st Subject: Re: RGB to video composite for ATARI 1040/Mega ST computer. Message-ID: <965@chinet.UUCP> Date: Wed, 6-May-87 23:39:13 EDT Article-I.D.: chinet.965 Posted: Wed May 6 23:39:13 1987 Date-Received: Sat, 9-May-87 10:17:26 EDT References: <8705060843.AA21103@cogsci.berkeley.edu> Reply-To: cabbie@chinet.UUCP (Richard Andrews) Organization: Chinet - Public Access Unix Lines: 31