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Article #2503Re: ST & ordinary monochrome monitors
From: mike knudsen
Date: Tue, 18 Feb 1986 23:42
Date: Tue, 18 Feb 1986 23:42
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Someone asked whether an ordinary monochrome monitor could be tweaked up to run on the ST. In color modes, yes (with some interface work). But for the 640x400, nope! I took a closer look at the pretty colored Atari flyer spec sheet, and not only is the vertical frequency up to 71 Hz, but the Horizontal is a whopping 35.7 KHz, or 2.13 times the NTSC standard 15.75! This answers a long-standing question-- ST Monochrome is NON-INTERLACED! It really draws all 400 lines in each of 70 frames/sec! Atari really went all the way on this. Maybe the IBM PC monitors are already up there (I think the Mac is only 22 KHz or so), but no 15.75 KHz monitor could be tweaked to over double its design freq. mike k PS: This assumes that the spec sheet is correct. PPS: The sheet also sez the RGB uses separate, not green, Sync.
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84 exptools; site ihwpt.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbosgd!ihnp4!ihwpt!knudsen From: knudsen@ihwpt.UUCP (mike knudsen) Newsgroups: net.micro.atari Subject: Re: ST & ordinary monochrome monitors Message-ID: <709@ihwpt.UUCP> Date: Tue, 18-Feb-86 18:42:27 EST Article-I.D.: ihwpt.709 Posted: Tue Feb 18 18:42:27 1986 Date-Received: Wed, 19-Feb-86 04:20:27 EST Distribution: net Organization: AT&T Bell Laboratories Lines: 24