ICUS UnixPC hard disk mod.
JIM PICKERING
jrp at rducky
Wed Aug 2 13:44:18 AEST 1989
I just completed Lenny and Gil's modifications to add the second drive
on my 3B1. Worked fine on the first try. Great job guys. I'll get to
the questionaire another evening.
I had a parts 7300 I bought some time ago and used the drive from it.
It is a Miniscribe 3425 (20MB) and did not have any drive select jumpers but
a set of dip switches. Rather than guess which ones to set, I just made a
cable with a twist ala IBM PC's (lines 25-29), and it worked! I also found
that if the second drive is powered down and the computer is not, the kernal
is not happy. Gotta disconnect the data/address lines too.
The whole project took all day, but I also gave it a thorough cleaning
(there were enough dust bunnies to weave a rug and the case was quite
yellowed ... evil nicotine and grunge) and installed a 120v fan (seems
quieter than the 12v). Couldn't find a source for a battery and holder,
so I'm stuck with a dead battery. Next time, as I have promised myself
to open the box at least once every 6 months to blow out the dust.
Thanks again Lenny and Gil. It is great to have some more disk space.
Now if I could only afford 2 of those 150MB CDC half height drives which
will fit in the case ...
jim
--
Jim Pickering c/o Technical Solutions || (north) ..csustan!polyslo!rducky!jrp
P.O. Box 1045 || (south) ..sdsu!polyslo!rducky!jrp
Arroyo Grande, CA 93420 || (south) ..csun!polyslo!rducky!jrp
(805) 473-1037 || (east) ..csufres!polyslo!rducky!jrp
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