# MDB64 Series

The MDB64 Series includes the following hardware:

- ISA-MDB64
- PCI-MDB64
- PC104-MDB64

This series makes up the controller portion of the MetraBus system. The Universal Library contains no functions to communicate specifically with this board. The functions in the library are directed to the devices on the bus instead.

For example, if this board was installed in InstaCal as board 0, and an MII-32 was installed as board 1, the communication would be directed to board 1. To read digital bits from this configuration, the function would be cbDBitIn()/DBitIn(), and the value of the BoardNum argument would be 1.