Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!well!oster
From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.misc
Subject: Re: reset button for si?
Message-ID: <22883@well.sf.ca.us>
Date: 25 Jan 91 08:33:05 GMT
References: <kscott.664550201@locke.mmwb.ucsf.edu> <bic.664574995@pom.mmwb.ucsf.edu> <42971@ut-emx.uucp>
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 11

According to Apple's notes for developers, in addition to the 68030 in the
si, there is a processor in the keyboard, and a third processor, a 6800,
in the CPU box, who's dole job is to service the keyboard. If the 6800
sees a long <Command><Power>, it sends an NMI to the 68030. Unlike on an
IBM PC, on a 68030 you can't mask an non-maskable interrupt.

(No smiley, due to stupid hardware design at intel, you really can mask
a non-maskable-interrupt on an intel processor.)
-- 
-- David Phillip Oster - At least the government doesn't make death worse.
-- oster@well.sf.ca.us = {backbone}!well!oster