Re: Kit-Based Lisa

From: James MacPhail <gg__at_email.domain.hidden>
Date: Mon, 17 Mar 2008 17:11:57 -0700

>Are there any custom chips in the Lisa?

Only one comes to mind: There is a mask programmed COP421 microcontroller on the I/O board that handles keyboard, mouse, and RTC. We don't have the source code, and no-one has extracted the binary AFAIK, although attempting that is on my to-do list.

The Lisa 2/10 version has a second custom chip on the I/O board, which is much like the IWM in the original Mac.

Some other chips are obsolete and may be quite difficult to find or very expensive, especially in quantity.

HTH, James

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. Received on 2015-07-15 16:43:00

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