Phil,
  I do know that the Lisa logic board had provisions for a battery
backup and serial number prom socket . The MacXL logic board does not.
The Lisa board I have has the batterybackup on it. I removed the
batteries as they were corroded. I am not sure of what other changes in
the boards are. I saw an article years ago explaining the changes but
that was years ago. I can ask my friend in Minneapolis Minnesota if he
remembers. He still has several Mac XL's in his stash the last time I
talked to him.
               Al

-----Original Message-----
From: LisaList [mailto:[EMAIL PROTECTED] On Behalf Of Philip
Lord
Sent: Thursday, August 25, 2005 10:52 AM
To: LisaList
Subject: I/O board compatibility?

I read in the Sun Remarketing 'do it yourself guide' that Lisa I/O cards
will not work in a XL. My question is, what is it about an XL that makes
it an XL, and what is it about a Lisa that makes it a lisa? is it the
Motherboard?

For example: if I had a lisa 2 upgraded to a XL (new roms for 800k
floppy, and widget drive) that has a dead original lisa 2 motherboard
(parallel port version), and I'm replacing the dead motherboard and card
cage with a motherboard and card cage from an XL (no Parallel port
version), will the original lisa I/O card still work or do I have to
change that too?

Thanks in advance.

Phil



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