Peter Fitzsimmons wrote in a message to Francois Thunus:

 PF> MS C 6.0 supports OS/2.  There was also an unreleased 
 PF> OS/2-32bit "MS C 6.5", that is hidden away on the IBM DDK cdrom.

It says:

   [C:\ddkx86\tools]cl386
   Microsoft (R) Microsoft 386 C Compiler. Version 6.00.054
   Copyright (c) Microsoft Corp 1984-1989. All rights reserved.

:-)

 FT> The os/2 2.0 was a large rewrite to make OS/2 32 bit, 
 FT> and Microsoft no longer had acces to that code.

 PF> MS and IBM developed 2.0 together (I have of a beta of 2.0 that 
 PF> actually came from MS).  MS has (and can use) the code, 
 PF> including SOM and WPS,from OS/2 2.0.  The split occurred during 
 PF> the development of 2.0.

The legal split in September 1992 did follow the release of both OS/2 2.0
and Windows 3.1 on the same day, April 1, 1992.  As a result, Microsoft and
IBM have access to each other's code for these products although they are
still subject to royalty.  However, the formal break in September 1992 was
the end of a long process of negotiation, and Microsoft had played no
active role in OS/2 development since the release of OS/2 1.2.  When IBM
found out that Microsoft's "OS/2 3.0" project had actually become
the "Windows/NT" project, that was what led to OS/2 1.3 being
developed by IBM rather than Microsoft.
 
-- Mike


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