This patch fixes an MCL 2.0 problem that was introduced by the 
68040LC chip used in the Centris 610 and some models of the Centris 
650. If you have a Centris model that has a floating point unit (FPU), 
you do not need this patch (although it should do no harm to install it 
anyway).

This file describes how to install the patch. You should also
have a file called "FPU-.hqx" -- it contains the patch itself.

Applying this patch requires the use of ResEdit. You'll use ResEdit to 
copy the "FPU-" resource from the patch file into the "MCL 2.0" 
application, replacing MCL's original "FPU-" resource. This patch does 
not care what other patches you may have applied to MCL -- simply 
read "MCL 2.0p<n>" wherever you see "MCL 2.0" in these instructions.

Here are the step-by-step directions, using ResEdit version 2.1.1.

First, make sure you have a backup copy of the "MCL 2.0" 
application, just in case. If you don't have a copy of the ship disks 
nearby, make a copy of the application before proceeding.

The patch file is in BinHex format, so you'll need to decode this file. 
You can use any of a number of freely available programs that know 
how to do this (StuffIt, for example, or Compact Pro). This will create 
a file called "FPU-".

Now launch ResEdit. Open "FPU-" in ResEdit. A window will open, 
showing two resources: one called "FPU-", the other called "vers". 
Ignore the "vers" resource; it's there only so we can tell one version 
of this patch from another. Select the icon for the "FPU-" resource (by 
single-clicking on it), then select "COPY" under ResEdit's "Edit" menu.

Now open "MCL 2.0" in ResEdit. You'll see a large number of MCL 
resources. Locate the "FPU-" icon in the MCL 2.0 window, select it (by 
single-clicking on it), then select "PASTE" under ResEdit's "Edit" 
menu. ResEdit will now display a dialog with three buttons and this 
text:

	"Press the unique ID button if you
	want new resource IDs assigned to
	the resources with conflicting IDs.

	Replace resources with the same ID?"

Select the YES button.

You've now installed the patch, but let's check just to be sure. Open 
MCL's FPU- resource by double-clicking on the FPU- icon. The 
window that opens in response to this should show one resource: ID=1, 
Size=1250, and Name="SANE". If this is what it says, you've 
successfully applied the patch.

Now select "Save" under ResEdit's "File" menu. You should rename 
the application to something that reminds you you've installed this 
patch. 

If this isn't clear, if you can't locate a copy of ResEdit, or if you have 
any other problems installing this patch, please let us know at bug-
mcl@cambridge.apple.com.

Thanks for using Macintosh Common Lisp 2.0!