Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 ◄Summary►                                   ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────────────────────────────────────────────────────────────────
 
     This function is available only on machines using the Micro
     Channel Architecture (MCA) bus.
 
     After a slot is enabled with Subfunction 01h, specific information
     can be obtained for the adapter in that slot by performing port
     input operations:
 
     Port     Function
 
     100h     MCA ID (low byte)
     101h     MCA ID (high byte)
     102h     Option Select Byte 1
              (bit 0 = 1 if enabled, = 0 if disabled)
     103h     Option Select Byte 2
     104h     Option Select Byte 3
     105h     Option Select Byte 4
              (bits 6-7 = channel check indicators)
     106h     Subaddress Extension (low byte)
     107h     Subaddress Extension (high byte)
                                    -♦-