PDP-9, 9/L Interface Manual

This manual serves as a comprehensive guide for design engineers to interface with Digital Equipment Corporation's PDP-9 and PDP-9/L computers. It provides fundamental interface data, assuming familiarity with logic design, interface design principles, and PDP-9 programming.

The document covers DEC logic symbology, detailed descriptions of the PDP-9 and PDP-9/L computer systems with a focus on input/output (I/O) facilities, and various interfacing techniques. These techniques include program-controlled transfers, direct memory access (DMA), and interactions via the Automatic Priority Interrupt (API) option and Data Channel. Additional sections provide general wiring rules and suggestions, ground system specifications, and details on user terminal interfaces like the Teletype. Appendices offer summaries of the I/O bus, characteristics and interconnections of DEC Flip Chip modules, and a practical design example for a standard I/O interface.