fried disk][ controller - any hope ?

[Ronny Svedman <rosv4119@student.uu.se>]

I am working on a small ][ project at our university computer club here
in Uppsala, sweden. (basically leeching asimov for software and putting
it on disk][ floppies to play nostalgia games, and maxing out the
machines with plugin boards for no money at all)

We have three ][ pluses and a ][e (unenhanced) 3 silentypes, 3 green
monitors (one apple, 2 others (zenith / datavision)), a heap of disk][
drives and a box full of assorted pluginboards. I have scrounged an old
486 to use for disk transfers, and i traded Dos 3.3 and Prodos
bootfloppies for a superserialcard for the ][e, so i can use ADT to
transfer floppy images. (thanks a lot to the guy who wrote that program
- it rocks!)

I have pirated a Buggie power supply (without knowing - i just connected
it up, long before i started reading csa2) for the third ][plus, when it
went *zap* long ago. 

Anyway: i have a few extra disk][ interface cards, and a small heap of
drives in varying condition. most work ok, so i'm not at a crisis point,
but it would sure be nice to get the last few working. So , to get to
the point:

I would like to know if anyone knows whats the most probable cause for
the following behaviour of Apple disk][ interfaces:



**  one card, whips dating spring 1982 (came with the ][e) reads &
wirtes disks just fine, but it never stops the drivemotors spinning.
When I boot Dos3.3 in drive 1, the light stays on, and the disk spins
perpetually. Then, if i access drive 2 on the card, it stops drive 1,
and starts drive 2, (and reads&wirtes just fine), and thene never turns
drive 2 off. What could cause this, and can it be fixed ?


** the other "problem" card simply doesnt spin up the drives at all. i t
doenst prevent booting the computer; i can reset it into basic, but it
doenst spin the drives..  this one is a really old one (13 sectors,
judging from the IC numbers


Any ideas?


/Ronny Svedman, update computer society, Uppsala sweden