TRS-80 Mod I Video Display

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Sat Jul 19 17:04:33 2003

> You'll need to solder at least two wires to make a cable from 5 pin DIN to
> composite. (in a pinch, you could take cut up a DIN cable and a composite
> cable and twist them together).
> For permanent use, drill a hole in the case and install an RCA jack.
>
> I don't remember the pinout, but I think that the video 5 pin DIN had
> video, ground, and 5V?

Yes, composite video, ground, and 5V from the CPU to the monitor to power
the input buffer on the video interface PCB. One thing to be aware of is
that on 99% of 5 pin DIN plugs, pin 2 is ground. On this one, pin 2 is
not connected. So a normal audio cable (say 5 pin DIN to 4 RCA plugs,
which is a common tape recorder lead over here) doesn't work!

The pinout (from the TRS-80 TechRef) is :

1 : +5V
2 : N/C
3 : N/C
4 : Composite video
5 : Ground

Note that the pins are numbered in the order 1, 4, 2, 5, 3

> I don't even remember which of the three side by side 5 pin DINs was the

The middle one!

-tony
Received on Sat Jul 19 2003 - 17:04:33 BST