2 Aug
1998
2 Aug
'98
10:37 a.m.
Most modern drives are 90 ips. The Sidewinder comes in
both versions.
There are a couple of quick ways of telling which one you have :
1) Look at the board on the bottom of the drive itself. There's a 3 pin
header with a jumper link. It's marked 30 and 90. The meaning is obvious
The drive is jumpered 90 ips.
2) At the back of the lower board in the controller
there's a link marked
'90' with a 14 pin chip that may be missing alongside it. 90 ips
controllers have the link, but the chip is not fitted. 30 ips controllers
have the link, and the chip isn't fitted (The chip is a 74LS74, wired as
a /3 counter. It divides a master clock by 3 to get the 30ips write
clock. On 90 ips drives, the chip is not fitted, and the link connects
the write clock line to the master clock).
Ok, the link is fitted, and the chip immediatly to the left of the link is
fitted, but is a 74LS01, the Chip just below that is NOT fitted.
If you've got a 90 ips controller, plug in the
Wangtek drive and see what
happens. If not, then you'll have to start fixing the sidewinder properly.
"Drive not responding" -- Would the fact that I am using an external
supply have any affect here?
BTW, is the drive roller (on top of the motor spindle)
in good condition?
If it's decayed (and they often do), and you've cleaned off the 'gunge',
then it'll now be too small, and the tape speed with be wrong. Worth
checking.
The roller is pretty much decayed, Would any QIC-02 drive plugged in here
work?
Cheers
karl
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Karl Maftoum
Computer Engineering student at the University of Canberra, Australia
Email: k.maftoum(a)student.canberra.edu.au