Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!amdahl!uunet!dg!podlipec
From: podlipec@dg.dg.com (Mark Podlipec)
Newsgroups: comp.sys.amiga
Subject: Re: Taking the plunge
Summary: Reason for Amiga not to boot with some RGB cables
Message-ID: <108@dg.dg.com>
Date: 1 Feb 89 22:58:56 GMT
References: <5817@cbmvax.UUCP> <6954@killer.DALLAS.TX.US> <8518@dasys1.UUCP>
Organization: Data General Corp, Westboro, MA
Lines: 13

In article <8518@dasys1.UUCP>, gil@dasys1.UUCP (Gil Winokur) writes:
> 
> I had a difficult time connecting my Diamondscan to my Amiga 500 when I first
> got them (wouldn't boot with cable in place) but after I got bought a cable
> (from Abel - cheap!) I have had no more problems - and the persistence is high 
Pin 2 of the RGB connector on your Amiga is an external clock enable(active low)
. If the cable you hooked up grounds this pin then the amiga is expecting its sy
stem clock(or rather multiple of      ) to come from pin 1 of the RGB connector.
I had similar problems when debugging a Genlock 1300 I bought for $50. In additi
on to a bad cap in part of the Vertical sync section, it was'nt generating the
 28Mhz clock that was supposed to go to pin 1 of the RGB connector.

Mark Podlipec