DMP11 Synchronous Controller

The DMP11 Synchronous Controller is a microprocessor-based intelligent multi-point synchronous serial line interface for the UNIBUS. It uses DMA to transfer data to and from main memory. The DMP11 can operate in either half-duplex or full-duplex, at baud rates up to 1M bits/second (half-duplex) or 512K bits/second (full-duplex); when operating as a control station, it can control up to 32 tributary stations.

It consists of two hex boards:

• a microprocessor module (M8207-YA)
• a line module (M8203), which can be configured to one of 4 choices via jumpers and DIP switches, one of:
  • DMP11-AA RS-232 or RS-423 or null modem (up to 9.6K bps)
  • DMP11-AB V.35
  • DMP11-AC integral modem (56K, 1M bps)
  • DMP11-AE RS-422

Both plug into SPC slots, preferably adjacent; the two boards communicate over a BC08S flat cable. The device driver communicates with the DMP11 via four control and status registers.

It supports DDCMP (version 4.0), including support for CRCs.

See also

• DMR11 Synchronous Controller

Further reading

• DMP11 Field Maintenance Print Set (MP-00795 - not online)

External links

• DMP11 Synchronous Controller Technical Manual (EK-DMP11-TM-001)
• M8207 Microprocessor Technical Manual (EK-M8207-TM-002)
• M8203 Line Unit Technical Manual (EK-M8203-TM-002)