On 7/13/2020 6:10 PM, Chuck Guzis via cctalk wrote:
Don't mention it--happy to help out!
I am especially impressed, for a few reasons. Backstory:
* I snagged 2 Model 12s at a CoCoFEST! a number of years ago during
the show auction. NO KBs
* I then spent too much I am sure buying extra boards from a chap
outside Atlanta who seemed to have sold these units for years.
* Peter Cetenski was gracious enough to get me a few bootable floppies
to try.
* Then, when picking up the Atlanta parts in Chicago (they came via
someone's back seat, I by plane), Jason Timmons loaded me up with
more Model II stuff (external drive, front bezels, and a few Model
IIs, including a batch of KBs.
* Finally, at Tandy Assembly 2018, I picked up 2 external HDDs for not
much coin)
* But, I have been sitting on all this collection in unusable form
since then. It's taking up valuable space and I know I don't need
it all, so I really need to get the units working I want, and then
move the rest to a new home.
* Still, all of the units collectively seemed a daunting task,
especially in light of my not knowing anything about the platform. I
don't even know how to list a dir in TS-DOS 2.0a (or whatever it is
called). LS-DOS uses dir, so there's that.
Of the 4 units, 1 requires a new resistor (well, at least 1 new
resistor), 2 were bad caps (now booting), and 1 has a good mech (swapped
logic board with another one), but the logic board has another issue.
Resistor is good, cap is good, and VR is outputting 11.9VDC. The
stepper moves when booted, and the drive motor also looks to be running
well. I can see the LED showing the index pulses, but not sure where I
should start (I have it sitting in a working mech, so I know all mech is
at least marginally OK (was booting from the mech with another logic board).
Jim
--
Jim Brain
[email protected]
www.jbrain.com
