Get Coprocessor Status

Returns information about whether or not a numeric
coprocessor exists, the type of coprocessor available (if
any), and whether or not the host or client is providing
coprocessor emulation.

Call With:

   AX     = 0E00H

Returns:

   if function successful
   Carry flag= clear (this function always succeeds in DPMI
           1.0)
   AX     = coprocessor status

           Bit    Significance
           0      MPv (MP bit in the virtual MSW/CR0)
                  0 = numeric coprocessor is disabled for
           this client
                  1 = numeric coprocessor is enabled for
           this client
           1      EMv (EM bit in the virtual MSW/CR0)
                  0 = client is not emulating coprocessor
           instructions
                  1 = client is emulating coprocessor
           instructions
           2      MPr (MP bit from the actual MSW/CR0)
                  0 = numeric coprocessor is not present
                  1 = numeric coprocessor is present
           3      EMr (EM bit from the actual MSW/CR0)
                  0 = host is not emulating coprocessor
           instructions
                  1 = host is emulating coprocessor
           instructions
           4-7    coprocessor type
                  00H = no coprocessor
                  02H = 80287
                  03H = 80387
                  04H = 80486 with numeric coprocessor
                          05H-0FH  reserved for future
           numeric processors
           8-15   not applicable


   if function unsuccessful
   Carry flag= set (this function always fails in DPMI 0.9)

Notes:

o  If the real EM (EMr) bit is set, the host is supplying or
   is capable of supplying floating point emulation.
o  If the MPv bit is not set, the host may not need to save
   the coprocessor state for this virtual machine to improve
   system performance.
o  MPr bit setting should be consistent with the setting of
   coprocessor type information. Ignore MPr bit information
   if it is in conflict with the coprocessor type
   information.
o  If the virtual EM (EMv) bit i
s set, the host delivers all coprocessor exceptions to the client, and
   the client is performing its own floating point emulation
   (whether or not a coprocessor is present or the host also
   has a floating point emulator).  In other words, if the
   EMv bit is set, the host sets the EM bit in the real CR0
   while the virtual machine is active, and reflects
   coprocessor not present faults (Int 7) to the virtual
   machine.
o  A client can determine the CPU type with Int 31H Function
   0400H, but a client should not draw any conclusions about
   the presence or absence of a coprocessor based on the CPU
   type alone.