DZ11

The DZ11 is an asynchronous multiplexer that interfaces a PDP-11 processor with eight asynchronous serial lines. It supports local terminal communication at speeds up to 9600 baud using either EIA RS232C or 20 mA current loop interfaces. The guide covers:

• General Description: Features, configurations (A-F), and performance specifications.
• Installation: Unpacking, setting up distribution panels, static filters, cabling, module installation (M7819 and M7814), and diagnostic testing.
• Programming: Register assignments (CSR, RBUF, LPR, TCR, MSR, TDR), bit functions, and programming examples in PDP-11 assembly for various modes, including interrupt-driven communication.
• Appendix: Guidance for connecting 20 mA DZ11 units to active devices using H319 current loop receivers.