Electronic Systems TRS-80 Serial I/O Board?

Chuck Guzis cclist at sydex.com
Tue Jun 13 21:23:24 CDT 2017

On 06/13/2017 06:27 PM, Eric Smith wrote:

> They sold it, then spent a bunch of money on Field Service trips to make
> it work for customers. It cost them enough to justify multiple
> redesigns, including (finally) switching to a crystal.

The TRS-80 board?   Do you have any documentation on Field Service
Trips?  That'd be amazing.

I'll add that a lot of low-end MCUs make use of internal RC oscillators
for their BRG--and they do just fine, right up to 115Kbit.


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