Hej Mikko!

Friday August 09 1996, Mikko Hyvarinen writes to Allan Mertner:

 MH> In OS/2 there are things that look like a physical COM port but are
 MH> actually something quite different. This includes VModem ports, CFOS
 MH> (ISDN) ports and COM ports redirected via LAN. If you try direct I/O on
 MH> these, you'll fail miserably. In addition direct I/O isn't exactly
 MH> multi-tasking friendly.

True.  However, for the purpose of porting DOS code to OS/2, it makes life
easier if the compiler accepts the port[] array initially.  Once the
program is up and running, it is your right to make it more OS/2-friendly
by replacing the Port[] accesses with DosDevIOCtl calls.  We just like to
provide our users with the functionality required to make porting as easy
as possible - and DosDevIOCtl calls certainly are not painless for the
uninitiated...

Yours,
Allan

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