SWTPC CT1024

[Brad]

Side note.. I found some CT-1024 documentation online and it suggested 110
baud.  So I set it at that.. it generates nothing but the occasional 8 now.

I'm interested to see how much of my issue is RAM... I've suspected RAM from
the start with a lot of this and have some NOS MM2102N chips coming to try
out.  I'm assuming I can piggyback those and see if we get anywhere.

-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brad
Sent: Friday, October 16, 2015 1:49 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
<cctalk at classiccmp.org>
Subject: SWTPC CT1024

While I was fooling around with my ASCI I decided to test the serial
connection to my PC.  The only thing I had available was my CT-1024 terminal
with the optional serial board.  This unit never worked when I got it.
Thought it was its ancient and probably non functional PSU, but after
hooking it up to a bench PSU same issues:

 

1)      Unstable video display with large whitish band in the middle.

2)      No response to keypresses.

3)      Field of blinking ? marks if cursor is switched off, garbled one
line of random characters up top if switched on.

 

When I connected it to my PC running PUTTY via serial cable, I fully
expected it to do nothing.  But to my surprise, it generates a continuous
stream of Js (punctuated by the odd H) on the PUTTY screen if the RECV
switch is off.  If I hit Break, it generates a whole bunch of Bs.  If I
switch the RECV switch ON, the Js stop but I can still generate Bs with the
Break key.

 

One thing I'm wondering now that I've switched power supplies and the video
situation isn't cleared up.. I'm wondering if this thing was set up to
connect to a composite monitor at all?  I've seen pictures of the CT1024
with a Sanyo monitor just like mine.. but on the Sanyo it does the same
thing it does on all the others.

 

Anyway, thoughts/ideas welcome.  Would love to get this thing running again.

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.6172 / Virus Database: 4447/10805 - Release Date: 10/12/15