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half a dozen motherboards
Posted by: bigmessowires on 2011-10-06 16:01:30
photo.JPG

1. Make impulse purchase of six compact Mac motherboards

2. ???

3. Profit!

Actually I fixed a SCSI problem with my Mac Plus by swapping in ROMs from one of these motherboards, so I guess that counts as profit. 🙂

Posted by: theos911 on 2011-10-06 18:27:12
Are these all of a certain type, or mixed?
Posted by: jruschme on 2011-10-06 18:49:23
It looks like 4 Mac Plus boards, a 128/512 board and an SE(?) board.
Posted by: bigmessowires on 2011-10-06 19:14:28
Yup, jruschme got it exactly right.
Posted by: Scott Baret on 2011-10-07 16:11:22
I'm guessing the SE is an FDHD board since it has a battery holder. It seems all of the pre-FDHD SEs had soldered batteries. Of course, I have heard of guys who've installed battery holders on 800K SE boards.
Posted by: bigmessowires on 2011-10-07 17:02:28
Hmm, could be. How can I tell? The silkscreen on the motherboard says "IWM", not "SWIM", but I don't know if that's meaningful.
Posted by: LCGuy on 2011-10-07 18:58:04
That'd be an original SE mobo then - IWM (Integrated Woz Machine) is the 800k controller. SWIM (Super-Woz Integrated Machine) is the one used on the SE FDHD and indeed all HD floppy compatible Macs.
Posted by: techknight on 2011-10-07 19:42:08
i have the SWIM/ROM ICs for the SE.
Posted by: bigmessowires on 2011-10-07 21:44:22
But does the motherboard silkscreen actually say "SWIM" on the FDHD SE? If it was just a ROM change, it's likely they kept the old motherboard.
Posted by: bigmessowires on 2011-11-06 14:17:06
It turns out this actually is a SE FDHD motherboard, and the "IWM" on the silkscreen means nothing. I booted it up and checked the ROM revision number to be sure. Then connected a 1.4MB floppy drive, and it worked just fine. Woohoo!
Posted by: trag on 2011-11-09 09:54:54
Nice haul. I don't even know of any place around here where such great older stuff could be found.
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