Tandon TM-100-1 electronics repair

Chuck Guzis cclist at sydex.com
Fri Apr 28 00:49:28 CDT 2017

> On Thu, 27 Apr 2017, Ethan Dicks via cctalk wrote:
>> Additionally, for a testing framework to poke signals through the 
>> drive for debugging during the repair, what's a good platform?  A
>> PC running MS-DOS?  The TRS-80 Model 4 itself?  Besides doing 
>> directories, are there any good bits of software anyone can
>> recommend for exercising floppy drives on a sub-system-by-subsystem
>> basis? (move the heads, do a read, do a write...)

I'd still recommend Dave Dunfield's ImageDisk--it's got several good
functions--test RPM, Clean heads, check alignment, etc.

Runs on MS-DOS and, AFAIK, even on the 5150.

I'm actually a bit surprised that nobody's done a floppy exerciser for
the lowly Arduino.  Easy enough--if you use the timer "capture" feature
on the AVR, you can even do simple disk read testing.


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