17 Mar
2003
17 Mar
'03
12:25 a.m.
Stumbling across this thread, I couldn't help but notice the problem. One of
the first order of business on the '89 is to check the power supply Molex
connector on the back of the supply. This has a habit of getting too hot and
carbonizing. Bypassing the heavy current lead is the usual way to handle
that. You also need to check on the controller board to see if it's set up
for hard-sectored disc or softsectored ones.
The hard sectored (10 sectors) are probably long gone from this world. I
still have mine and it occasionally gets the dust blown away.
For those who learned to use a good typewriter this is the best keyboard ever
installed on a PC.
17 Mar
17 Mar
6:35 p.m.
that. You also need to check on the controller board
to see if it's set up
for hard-sectored disc or softsectored ones.
There are several controller boards IIRC, and you can have 2 installed at
the same time. Mu Z90 has the hard-sectored controller (using a USRT
chip) connected to the internal drive and the double-density
soft-sectored controller (using a WD179x chip) connected to the 2
external drives (all 5.25" units). I beleive there was an 8" drive system
and a hard disk.
The hard sectored (10 sectors) are probably long gone
from this world. I
I still have one... Getting the disks is a problem. One day, when I've
got nothing better to do, I am going to modify a junk 5.25" drive by
mounting a punch/die in place of the index sensor and an indexing plate
on the spindle. Then I can punch my own hard-sector holes.
still have mine and it occasionally gets the dust
blown away.
For those who learned to use a good typewriter this is the best keyboard ever
installed on a PC.
I thought it was a fairly standard design, similar to the ones on the
VT100, early TRS-80, HP85, etc.
7969
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7969
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