Date: Thu, 03 Mar 2005 20:18:52 -0800 From: Dave Huseby <[EMAIL PROTECTED]>
When I pulled the logic board, I was surprised to find that my 512K has been upgraded to a Mac Plus with a Sophisticated Circuits ROM/process upgrade with a Macs-a-Million memory expansion. Here's a photo: <http://www.linuxprogrammer.org/512_plus_upgrade_small.jpg>
If the "Logic" chip is labeled 5380 or 53C80 then it is definitely a SCSI port adapter. I can't imagine what else it could be. That's the only thing I know of that plugged into the ROM sockets and then piggybacked the ROMs on top.
The other board looks like most of the memory sockets are unpopulated. I imagine you have a bit more capacity there. How much memory does the thing have wiwth the card installed? 1 MB, 2 MB?
Jeff Walther
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