7 Feb
2011
7 Feb
'11
9:06 p.m.
On Mon, Feb 7, 2011 at 7:21 PM, Terry Stewart <terry at webweavers.co.nz> wrote:
http://www.classic-computers.org.nz/temp/lisa2-10-bottom-of-drive-circuit-b…
I've looked up the ICs on the bottom circuit board. ?Apart from the
microprocessor(?) these are:
8402 - rectifier?
What I'm reading from that one is...
(MMI logo)
MCI
(c)1982
8402
Since it's made by MMI, I'm going to say it's a programmable device
that Apple called an "MCI" with a copyright on the source file of
1982, manufactured the second week of 1984. That doesn't say what it
_does_ but 20-pin PALs aren't unusual, not even ones from 1984.
Perhaps you'll find a reference in a tech manual to the "MCI". I
don't recognize the acronym in this context.
-ethan