Re: //c 3.5" Disk, ARRGH!

[musjndx@gsusgi2.gsu.edu (Jonathan N. Deitch)]

kupiec@tigger.jvnc.net (Bob Kupiec) writes:

>Please help me!

>Recently, my //c stopped recognizing the 3.5" Apple drives.  The
>5.25" internal AND external drives work fine.  It's just that all 3.5"
>disk operations cannot be done.  No programs will recognize them
>either!

>I tied cleaning the pins, and I know both 3.5" are good.  Why can't my
>machine use them any longer?  I've tried just about everything.

>BTW- It *IS* an enhanced //c.  Everything else works just fine.

It is quite possible that the controller boards in the Unidisks have
fried.  This is usually caused by the failure of the 65C02 inside the
drive itself (it *is* an intelligent device, remember ...).

I can't think of any other reason your //c won't recognize 3.5" drive
and still recognize the 5.25".  Have you tried :

- a known good Unidisk 3.5 on your //c
- your Unidisks on a known good //c or //gs ?

- Jonathan
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