8 Apr
2015
8 Apr
'15
9:57 p.m.
I have finally managed to get my hands on a TRS-80
Model 1. Trouble is, it
came without a monitor. I have been doing some searching to see if I can
find out what kind of monitor it is and I am left unsure. All I have found
so far is a statement which says it is a TV without a tuner. I am not sure
what that means. I still have a CRT TV, can that be made to work, or have I
bought something that I can't use?
Did you get the PSU brick? That is a little harder (but only a little) to replicate?
The TRS-80 M1 drives a normal [1] composite video monitor. The original one was an RCA
portable TV that had had the tuner, etc, removed, but there is no reason why you have to
use that. I am sure you have something that will work.
[1] OK, US scan rates. 15770Hz horizontal, 60Hz vertical. But I've yet to find a
composite
monochrome monitor that can't be tweaked to do both US and European rates.
The only trick is the video output connector on the M1. It's a 5 pin DIN socket. The
connections are :
1 : +5V
4 : Composite video
2 ; N/C
5 : Ground
3 : N/C
And of course the pins are numbered in that order on the connector/
-tony