Path: utzoo!utgpu!watserv1!watmath!att!dptg!ulysses!andante!mit-eddie!snorkelwacker!apple!uokmax!drtiller From: drtiller@uokmax.uucp (Donald Richard Tillery Jr) Newsgroups: comp.sys.amiga.tech Subject: Re: impedance values for Diamondscan Message-ID: <1990Jul23.073000.9071@uokmax.uucp> Date: 23 Jul 90 07:30:00 GMT References: Distribution: na Organization: Engineering Computer Network, University of Oklahoma, Norman, OK Lines: 35 I too made my own cable when I first got my Diamond Scan while I awaited the "official" one from Redmond. I had the same problem. When the cable arrived I had another problem, evidently the 23 pin connector had an inductance or capacitance problem which caused the green line to be delayed by about a high res pixel. The result was that an increase in intensity from a pixel to the next resulted in a pink/purple looking effect and a decreasing intensity saw a green tint effect. After some destructive testing of the cable, I determined the 23-pin connector to be at fault and built another cable using a hack-sawed 25 pin as the Amiga end. What I ended up hooking up (different from the interim cable with the boot up problem) was the R,G and B lines (obviously), the composite sync (made of both horz and vert syncs) and one ground from the sync ground. Here is what I use (and it works completely): Amiga Diamond Scan ----- ------------ 3 2 4 4 5 14 10 16 16 1,2,4,15 Believe it or not this works flawlessly and there is no need for separate horz and vert syncs (and indeed this causes problems) or the inverter included with the Redmond cable (the montor is versitile enough to allow positive or negative syncs). I hope this helps, and any other queries are welcome. _______ __________ _/____) ' __ /_/ / ' / / __ _ "N.I.N.J.A.J.I.S."-Me / \___/__/___/ |_ /__/__/__/_/_-_/__/_/ The Displaced Razorback. ___________________________________________/ Founder: IDGAFF Ltd. The Amiga Computer - "...a more fiendish disputant than the Great Hyperbolic Omni-Cognate Neutron Wrangler of Ciceronicus Twelve..." -D.Adams; Well, almost.