Re: Drive swaps

["Roger Johnstone" <rojaws@mac.com>]

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
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