Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!fernwood!portal!cup.portal.com!CPS
From: CPS@cup.portal.com (CHRIS PATRIC SMOLINSKI)
Newsgroups: comp.sys.mac.system
Subject: Re: Virtual 32-bit clean ROMs
Message-ID: <41524@cup.portal.com>
Date: 22 Apr 91 00:24:55 GMT
References: <3336@borg.cs.unc.edu>
  <1991Apr21.025813.5339@agate.berkeley.edu>
  <1991Apr21.093457.21425@wuarchive.wustl.edu>
Organization: The Portal System (TM)
Lines: 13

The ROM in a Mac sits at $400000.  At boot time, it is temporarily mapped
to $000000, (since the 680x0 starts execution there).


Yes, there are a few hardware hackers left.  I'm playing with a new found
Lisa myself, and in a similar situation.  I need to find the address of
the ROM and various I/O (IWM, other ports) when the Lisa is in the 
"Service Mode".  Trying to interface a 800K floppy drive.

Good luck with your project, I'm a fellow SE/30 owner myself, rather annoyed
with Apple's general attitude right now.

- CHRIS