Article 31842 of comp.sys.apple2.marketplace:
Message-ID: <3982F77E.366F9ACA@intergate.bc.ca>
Date: Sat, 29 Jul 2000 08:25:52 -0700
From: Wayne Stewart <waynes@intergate.bc.ca>
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Subject: Re: Dead external 800k floppy or case
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Harry Dodsworth wrote:

>   This may be an opportunity to ask which 3 1/2 inch disk drive
> is used with the Apple II series.
>   I know of three:
> 1) Labelled Apple 3.5 drive A9M0106 part 825-1304-A
>
>      and       5 inch drive A9M0107 part 825-1278-A
>
> 2) Labelled 800K External M0131     part 825-1174-A
>
> 3) A taller chunky drive (no description) M0130. I've seen this with
>    Mac Pluses. Mine has 400k pencilled on, possibly a downgrade :-)
>
> --
> Harry Dodsworth Ottawa Ontario Canada  af877@freenet.carleton.ca
> ----------------------------------------------------------------

M0130 is a 400k drive that originally came with the 128k & 512k Mac.
It can only be used with an Apple II with a UDC (Universal Disk
Controller)
card

M0131 is a Mac 800k drive and can only be used in an Apple II with a UDC

card.

A9M0106 is an 800k drive that can be used with a IIgs, IIc+ and an Apple
II
containing either a SuperDrive card or a UDC card.

G7287 is the 1.44mb 800k drive(3.5” SuperDrive. It will only work as a
1.44mb drive on an Apple II with a SuperDrive controller card. It will
function
as an 800k drive if connected to the disk port on a IIgs or a IIc+ or a
UDC card.

2A2M2053 is the 3.5” UniDisk. An 800k drive that can be used with a
IIgs,IIc,
IIc+, and an Apple II containing a Liron card or a SuperDrive card. Some
versions
of the UDC card support this drive and others don’t.

There’s other 3rd party 3.5” drives that’ll work on an Apple II but I
think that
covers the ones made by Apple.

    Wayne






Yor name wrote:

> Hmmm.  I just got a 3 1/2 drive from a seller in IL (don't ask how much,
> you'll cry), and it has an eject button.  While at my local Flea Market,
> getting fleas, I found another 3 1/2 drive (again, don't ask how much, it'll
> really get the old tearducts running) without an eject button.  I assume
> that the buttonless one is a "unidrive".  From the sources I've read on the
> Internet, the unidrive is supposed to be compatible with the GS only slower.
> Since I'm distracted by something else right now, I'm not going to verify
> this.
>
> So, what is what here?
>
> Is the 3.5 inch Unidrive (buttonless) compatible with the GS and Mac?
>
> Is the GS 3.5 inch (with eject button) compatible with the GS and Mac?

There were two Apple drives made without buttons, M0130, a 400k drive
and the M0131, an 800k drive. These will only work on the Mac unless
you have a rare controller card in your Apple II.

The A9M0106 has a button and will work with Mac or the IIgs or IIc+.
It'll also work with a II+ or IIe that has one of two rare controller cards.
It will not work with the IIc.

The G7287 is Apples 1.4mb drive. It has an eject button and will work
with Macs although some like the Mac plus will only use it as an 800k
drive. It will function in the IIc+ and IIgs as a 800k drive too unless you
have a Superdrive controller card that lets it use 1.4mb disks. The
SuperDrive controller card also works nicely in the II, II+, and IIe.

The 3.5" Unidisk A2M2053 has a button  but will not work with the Mac.
It will work with the IIgs although more slowly than the A9M0106. It'll
also work with some IIc, all IIc+ and any IIe or II+ with one of three
controller cards

    Wayne




In article <3BD37686.73A33C19@intergate.ca>, Wayne Stewart 
<waynes@intergate.ca> wrote:

> Declan Macleoid wrote:

>> Had a thought over the weekend....
>> Given that PPC Macs have documented difficulty in reliably creating GS disks,
>> has anyone tried switching out a later manual inject drive in a PPC box for
>> an earlier auto-inject drive from a m68k machine?  Could the earlier drive be
>> installed in the later machine?

> I tried that on a beige G3, the last Mac to use a floppy drive. The drive
> would immediately eject any disk inserted into it. I never looked into why it
> does this, did they change the pinout or is the drive just not compatible with
> those machines?

> Wayne

When I tried connecting my Apple IIgs' Apple 3.5 Drive to my iMac it did
something similar. I had connected the drive directly to the iMac, but I
found that leaving the daisy chain board in place allowed it to work, which
seemed odd.

I found an article in Apple's archive at
<http://karchive.info.apple.com/article.html?artnum=1605>. The table is
munged on the web page so I've reproduced it below. It would appear that the
cable has changed at least once.


TITLE
Apple 800K Drive Mechanism and Cable Compatibility

DISCUSSION
Drive and Cable Compatibility Chart

(YES = Compatible NO = Not Compatible)


                   | APPLE 3.5 MECHANISM   |800K DRIVE MECHANISM
                   | Part # 661-0345       |Part # 661-0305
                   | MFD-51W-03            |MFD-51W or 51W-10
                   | red on silver label   |black on silver label
-------------------|-----------------------|---------------------
INTERNAL MACINTOSH | Yes- w/ yellow        | Yes- w/ red internal
                   | internal drive cable  | drive cable
                   | part # 590-0437       | part # 590-0167
-------------------|-----------------------|---------------------
EXTERNAL           | YES                   | YES
800 K DRIVE        |                       |
-------------------|-----------------------|---------------------
UNIDISK 3.5 DRIVE  | YES                   | YES
-------------------|-----------------------|---------------------
APPLE 3.5 DRIVE    | YES                   | NO
-------------------|-----------------------|---------------------

NOTES:

1. If an Apple 3.5 Drive mechanism (P/N 661-0345) is installed as
an internal Macintosh drive, it will require a YELLOW striped
internal cable (P/N 590-0437) in order to operate.

2. If an older version of the Apple 800K Drive mechanism
(P/N 661-0305) is installed as an internal Macintosh drive,
it will require a RED striped internal flat cable (P/N 590-0167)
in order to operate.

3. It is possible to install the recently released Apple 3.5
Drive mechanism in an external Macintosh 800K Drive or in a
UniDisk 3.5 Drive. However, you should NEVER try to install
the older verison 800K Drive mechanism in an Apple 3.5 Drive.

4. You can distinguish the Apple 3.5 Drive mechanism
(P/N 661-0345) from the older version 800K Drive mechanism
(P/N 661-0305) by its Apple and vendor part numbers. Also,
each mechanism has a different colored drive label. Refer to
the chart above for the details.

--
Roger Johnstone, Invercargill, New Zealand

Apple II - Future Cop:LAPD - iMac Voodoo2 - Warcraft II
http://homepage.mac.com/rojaws
______________________________________________________________________

Marketer to coder: "You start coding. I'll go find out what they want."





Tony Cianfaglione wrote:
> Oh, I was thinking the A2 3.5" card was just a regular 3.5" drive card 
> for the IIe.  I thought the SuperDrive card had a different name.
> 
> -----------------------------
> 
> On 15 Oct 2003, Michael J. Mahon wrote:
> 
> 
>>Ah, but the Apple II 3,5" Disk Controller Card _is_ the special card.  ;-)

It's easy to understand the confusion, Apple really could have chosen
better names for their Apple II 3.5" controllers

The 3.5" UniDisk controller card is marked
APPLE 3.5 FLOPPY DISK DRIVE INTERFACE CARD

The Superdrive controller card is marked
Apple II 3.5" Disk Controller Card

Wayne



