SS10 console settings

tony duell ard at
Mon Jun 15 00:05:00 CDT 2015

> How in hell a *cable* can result in garbage beats me. I would expect
> data, or no data - not garbage data...

Two things spring to mind :

1) Open-circuit signal ground, with the ground therefore completed by mains earth. I had a nasty
version of that years ago, the system would work with a VT100 (at lower baud rates), but not at all
with my Tandy M100 laptop. 

2) Too much stray capacitance. Given a sensible output impedance on the driver (and there is a 
specification for this), this will round off the pulses, make narrow pulses too small, and so on. This
is the more likely cause I think. How long was the defective cable?


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