Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!elroy.jpl.nasa.gov!swrinde!zaphod!rpi!uupsi!cci632!ph
From: ph@cci632.UUCP (Pete Hoch)
Newsgroups: comp.sys.mac.system
Subject: Re: IIcx ROM Question
Summary: An INIT will just not do it.
Message-ID: <47134@cci632.UUCP>
Date: 14 Jan 91 21:13:55 GMT
References: <41599@nigel.ee.udel.edu>
Organization: Computer Consoles Inc. an STC Company, Rochester, NY
Lines: 35

In article <41599@nigel.ee.udel.edu>, johnston@oscar.ccm.udel.edu writes:
> In article <12925@spt.entity.com>, mdc@spt.entity.com (Marty Connor) writes...
> >Can someone tell me whether it will be possible to put 20 megabytes of
> >physical RAM in a IIcx and have System 7 use it all properly?

> >Will this require a ROM upgrade?

> Naively, it would seem that whatever is lacking could be taken care
> off by an init.

> What's the big deal?


The big deal is that the Memory Manager will either boot in 24 or 32
bit mode.  However once booted you cannot switch.  Therefore an init
to clean things up is just a little too late to save the system from
calling its own 32-Bit unclean ROM code.

As to the original question.  You can put as much memory in a IIcx
as you like, 20, 40, 100 Meg.  Go crazy.  However with Maxima or
System 7.0 you will only be able to access the first 14 Meg.

As a side note I sent a question to DTS that went sometnig like this.

  Hi,

  I want to follow your suggestions and write code that is 32-Bit 
  clean.  However I have a IIcx and so I can't run in 32-Bit mode.
  Do you have any suggestions as to how I can test my applications
  for 32-Bit cleaness?

They never even acknowleged that I sent in the question.
ROM upgrade?  I would like one but I am not holding my breath.

Pete