Path: utzoo!mnetor!uunet!husc6!mit-eddie!bbn!uwmcsd1!gmwi1!marque!gryphon!cadovax!keithd
From: keithd@cadovax.UUCP (Keith Doyle)
Newsgroups: comp.sys.amiga
Subject: Re: Digital RGB with Amy
Message-ID: <1994@cadovax.UUCP>
Date: 16 Mar 88 18:55:44 GMT
References: <2684@crash.cts.com>
Reply-To: keithd@cadovax.UUCP (Keith Doyle)
Organization: Contel Business Systems, Torrance, CA
Lines: 25

In article <2684@crash.cts.com> mikeg@pro-charlotte.cts.com (Mike Gladden) writes:
>Has anyone out there in netdom had any success using a digital RGB monitor
>with the A500?  I have tried it with two different monitors to no avail.  The
>cable was properly assembled, I'm sure, but for the record here's what I
>carried through:  Red, Blue, Green, Intensity, Ground, Horizontal Sync, and
>Vertical Sync.  I used the pin marked DGnd (I assume that meant digital
>ground) for the ground connection.  Oh yes, I did use the DIGITAL RGB lines.  

I've done it, and I've got news for you, once you do, you'll realize it
was a waste of time.

At any rate, I don't remember the exact specifics, but I believe the
Hsync and Vsync polarities are reversed.  I have a cable here I made,
which has a 74LS04 hot-glued to the 13 pin connector and runs Hsync and
Vsync through it.

Once you do this, you find that you have to adjust the heck out of
preferences to be able to see what is going on on the screen, and 
there are several programs I seem to remember that override preferences
settings resulting in completely unreadable displays.  Anything darker
than some % of full white ends up BLACK.  I found most colors end up
BLACK with many screens on an digital monitor.

Keith Doyle
#  {ucbvax,decvax}!trwrb!cadovax!keithd  Contel Business Systems 213-323-8170