"Random Stuff" on serial ports can be a speed, data-bits, or even parity
mis-match.
I assume you have tried tweaking these?
Dave
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at
classiccmp.org] On Behalf Of Brad H
Sent: 05 August 2016 06:58
To: 'General Discussion: On-Topic and Off-Topic Posts'
<cctalk at classiccmp.org>
Subject: RE: SWTPC 6800
I think this 6800 is live but I am being dogged by my inabilities when it
comes
to cabling. I'm going to purchase a
'proper' db25 female connector and
the
molex pins for the MP-S connector and solder it up. I
tried sort of using
jumper wires to make it go. When I turn the 6800 on, the PC terminal I'm
using reacts by producing single or strings of random characters.
According to the SWTPC 'system checkout' stuff, if I get anything at all
showing up on the terminal it usually means the 6800 is alive. Based on
the
notes written on the MP-S, I'm confident I have
the correct baud rate and
bit
(8) and parity (1) settings, but alas, doesn't
seem to work. When I ran
into
this sort of thing with MSI 6800 it turned out the
baud rate switch on the
serial card wasn't correct, despite factory labelling. That might be the
case
here but not really sure how to sort it.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at
classiccmp.org] On Behalf Of Paul
Birkel
Sent: Thursday, August 4, 2016 12:29 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
<cctalk at classiccmp.org>
Subject: RE: SWTPC 6800