Re: 800k vs 1.44k floppy drives (UPDATE)

["william strutts" <wrstrutts1@nospam.home.com>]

"Mark Cummings" <NOTfigjams@primus.com.au> wrote in message
3bb85153@news.iprimus.com.au">news:3bb85153@news.iprimus.com.au...
>
> Hey William,
>
> I have studied this problem extensively with my own Apple II system(s) and
> come to the conclusion that the daisychain board is faulty in the 2nd 3.5"
> drive.
> To prove it (sort of) you can remove the 2nd 3.5" drive and then put your
> two 5.25" drives onto your first 3.5" drive. If they both work then try
> swapping out the 3.5" drive with the faulty one, and you will see that the
> second 5.25" drive stops working.

I thought about that last night. I experimented with it and found that
my second 3.5" was indeed bad.

> I have two out of five 3.5" drives that exhibit this fault. I went as far
as
> swapping out the daisychain board to find the fault. Alas there is no cure
> for this daisychain board as they are only found in 800K Apple 3.5"
drives.
> I suspect the LSI chip on it is faulty as there are very few other parts.
If
> the drive mechanism itself was faulty then it's an easy fix by putting in
a
> 1.4M auto inject drive mechanism from a old Mac which are plentiful and
> cheap.

No known cure eh?

UPDATE:

I found a new 3.5" Apple Floppy drive at a Thrift store for a
$1 and it appears to be of a slightly modified design. It has a
large fat connector for the 19-pin connector. It is similar in
design to the Mac High Res Monitor cable. The connector
extends about an inch beyond the normal drive connector
and is about a half inch round.  Anyway, I plug this newer
drive into my IIgs and voila! It works with GS/OS and it
recognizes both 3.5" and 5.25" drives. So it appears that the
daisychain board is indeed at fault as Mark Cummings
suggested above.  Thanks Mark for the solution.



--
--
William R. Strutts - wrstrutts1@nospam.home.com - Whatever!

C'est moi!  http://www.facelink.com/wrstrutts

Just hacking away...

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