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From: bill@bilver.uucp (Bill Vermillion)
Newsgroups: comp.sys.tandy
Subject: Re: TRS-80 Model 1 question
Message-ID: <1991Feb28.191738.29181@bilver.uucp>
Date: 28 Feb 91 19:17:38 GMT
References: <0bmzJQ_00VI8I0t_5p@andrew.cmu.edu>
Organization: W. J. Vermillion - Winter Park, FL
Lines: 33

In article <0bmzJQ_00VI8I0t_5p@andrew.cmu.edu> dd26+@andrew.cmu.edu (Douglas F. DeJulio) writes:
>I've got this old TRS-08 Model 1 that I've just recently found in the
>basement of my parents' house during a visit, and I'd like to hook it
>up and test it out (and play some of those Big Five games again).  The
>problem?  No monitor.  Does anybody know what I'd need to do to wire
>something from the video out of the TRS-80 to the video in of a VCR?

The video connector on the back of the I is a 5-pin din connector.
On the connector there are 3 significant signals.  video, +5 v, and
ground.

The original monitor was made by RCA and was a hot-chassis tv set
with the tuner out.

The 5v powered an opto-isolator circuit to keep the 110vac out othe
computer (and user).

The easiest way is to get a mono 5pin din (with 3 connectors) to
two RCA plugs.  They were available for the original cassette
machines. One plug will have the video signal on it with the
associated ground.  Cut of the other and wire directly to a
standard video monitor.

Or build your own.   This is from memory (about 11 years ago now)
the only pins you need to worry about a 1,3 and 5.  You could check
with an ohm-meter and find ground.  Then find 5v.  Use the one that
is NOT 5v and the ground.  Video is standard composite.  I used
non-RS monitors for years.  Big improvement.


-- 
Bill Vermillion - UUCP: uunet!tarpit!bilver!bill
                      : bill@bilver.UUCP