Re: Drive Keeps Running...

[shack@onyx.southwind.net (Randy Shackelford)]

In article <1dttlry.1po79sk6aq2d8N@dempson.actrix.gen.nz>,
David Empson <dempson@actrix.gen.nz> wrote:

>> I have a non-working MacPlus which I can get an IWM out of.  Are these
>> the same chip?
>
>Probably.
>
>There are two variants of the package: DIP (dual in-line package), as
>used in the IIc, and PLCC (plastic lead chip carrier, a.k.a. square
>pack), as used in the IIgs.
>
>I'm pretty sure the original Mac 128 has the DIP version of the IWM (I
>have a bare motherboard, but I haven't looked at it for a while), but
>I've never looked at a Mac Plus.

Actually, the Plus and SE have the DIP version as well. Makes it much handier
to do the superdrive upgrade on an SE. It might go for the original Mac II
as well, I'd have to peek at the board to be sure. Those had an upgrade to
superdrives as well.
 
>There might be generational differences between the chips, but I doubt
>it.  Have a look at the writing on the chip and see if there are any
>noticeable differences in the Apple part number.  There will probably be
>a manufacturing date code in the form MMYY, but I'd expect everything
>else to be the same.

I compared 'em once and I think there are varying rev letters but the part
number stayed the same.



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