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[LOOKING FOR] HOLMES Engineering, DX-3D Manual

Patrick.B (TTR)

Experienced Member
Joined
May 11, 2011
Messages
490
Location
Houston, Texas, USA
I am looking for the HOLMES Engineering, DX-3D schematics and or Manual
This is a TRS-80 floppy drive controller board
Does anyone have a copy of it?

here is what the board looks like
wlOH9qA.jpg
 
I'm just judging here by the absolutely comical routing on that board that this was a low-run product? Mail-order?
 
I can't read the number but I would expect a floppy controller chip on a floppy controller card. Maybe from Fujitsu? (8876)
 
Well there's a lot of well thought-out arrangement of traces, followed by spots where you can clearly tell they messed up and drew it in by hand.
Stuff like the lower right where you have one nice trace that links to a via, then two traces that loop around it.
Ah ... I did notice that one -- actually it's hard to miss! Had considered it to be "relaxed routing rule applied here" :->.
 
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