About MSDOS drivers for Computone Products.

Some Computone products have drivers available for MSDOS.  However,
this does not mean that all MSDOS applications currently using COM1,
COM2 and so on will be able to run.  The reason is, many applications
running under MSDOS are designed to access the serial hardware directly.
When an application has been written in that way, it is impossible for
a DOS driver to circumvent this, and the application will only run on
hardware which is compatible with COM1, COM2, and so on.

Some applications can ONLY use COM1-4 and are not configurable beyond 
this.

Some applications will support COM1-4 as well as any other hardware using
the same type of UART (i.e., 16450's or 16550's).  This generally precludes
using any intelligent multiport board, but may support such products as the
V4-ISA, which uses 16450/16550's.

Some applications can be configured to use the "INT 14" or "BIOS" interface
to the serial ports.  In that case, an MSDOS driver which contains an
"INT 14 handler" might be expected to work.  The IntelliPort-II MSDOS driver
includes such a handler, the older IntelliPort/ATVantage drivers do not.

Some applications are written to use any "named device".  An example would
be re-directing output from the command prompt (say, to a printer).  In
that case, any MSDOS driver might be expected to work.

Examine your application carefully to ensure that your chosen product
is likely to work.  

The older IntelliPort/ATVantage product line used boards which were
memory mapped.  Using such boards under MSDOS requires them to be placed
at addresses below 1Meg.  This is often impossible because of address 
conflicts with other devices.  The IntelliPort-II/IIEX product line
does not have this limitation, since it is not memory-mapped.