17 Nov
2007
17 Nov
'07
8:40 p.m.
From: rescue at hawkmountain.net
OK... so I took it apart...
There are 3 boards... all made by TEC
CPU Board:
CPU.KEY.RAMI/F
HEIID 028930
ASSY NO.HE82D054701
It doesn't sound like anything I recognize. Still, look at the RAM.
If it has at least 32K, CP/M is possible.
See what type of keyboard interface it has on it. If parallel,
it should be relatively easy to get it going. Serial would
be more difficult.
Display Interface Board:
DISPLAY I/F
HEIID 029340
ASSY NO.HE82D054801
FDC Board:
FDC CNT
HEIID 029040
ASSY NO.HE82D054901
The edge connectors have 59 pins on each side. There is a slit (key)
between
pins 6 and 7 .... not sure if this matches any 'standard' bus.
This is probably all custom stuff... but hoping (probably in vain), that
maybe this
thing is simply built from 'standard' parts... and can run something
else (CPM ? etc)
I have some pictures... but I haven't gotten them uploaded anywhere yet.
The 2 floppy drives are 5.25" FH (like IBM PC/XT) Qume Qumetrak 542 drives
(belt drive of course). So looks like 300RPM 360K drives. Not sure of belt
health (the look OK... but not sure how much tension they should have).
These
floppy drives good models ? Suppose you could use them in a PC/XT
restoration
(minus the fact they wouldn't be Tandons or have IBM P/Ns).
Even if you don't get something to just plug into it, it would still
be a fun project to get something running on it. Look at the components
used on the various boards, it will give you clues on how things
work. I wouldn't split it up if not needed.
For the belts, try holding the hub of flywheel and turn the motor shaft.
If it turns easily without transfering torque to the hub, then it will
need to be tightened. Usually the motor has some play in the mount
but if needed one can use a small rat tail file to elongate the mounting
holes.
More important is to make sure there is no gunk or lumpy oxide
on the flywheel. If so, smooth this down or it will cause erratic
disk writes and reads. The motor pully should be smooth as well
but I've found it not as critical as the flywheel surface.
Dwight
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