DQ11 NPR Synchronous Line Interface Manual

The DQ11 is a high-speed, double-buffered communications interface designed for the PDP-11 Unibus. This manual provides comprehensive details on the DQ11 system, including:

• Features and Specifications: Support for up to 1 megabaud, full/half-duplex operation, and programmable sync characters/error detection.
• Configurations: Descriptions of standard modules including the Basic Unit and expander options (Error Detection/Character Recognition).
• Installation: Procedures for module assembly, device/vector address selection via jumpers, and power requirements.
• Programming: Detailed register bit assignments and procedures for data transmission/reception, including use of NPR cycles.
• Detailed Logic Description: In-depth technical breakdown of the M7818, M7815, M7812, M7813, M7816, and M7817 modules, explaining their specific logic and signal handling.