ET> OK.  For using MASM/TASM on DOS, is there any specific porting
 ET> functions that you need to define or do before it compiles?

/Oi if you use TASM.  (so TASM generates standard .OBJ-files without
Borland extensions)

 ET> under OS/2 which is a serial communication library.  The second is some
 ET> screen functions in my user interface, such as mouse functions, filling
 ET> functions, color functions, text saving and restoring functions, cursor

Screen functions are pretty easy to port.  First you get the address to the
logical screen buffer and then you write to it instead of 0xB800:xxxx, then
you call VioShowBuf() to tell OS/2 which parts of the screen you have
modified.

If you already support Desqview then you probably can port your routines in
an hour or two.

I've never tried porting mouse routines but it seems pretty simple to me.

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