DPV11 Serial Synchronous Interface

This document is the official user guide for the DPV11 serial synchronous interface, designed for connecting an LSI-11 bus to a serial synchronous modem. It covers the following key areas:

• General Description: Explains the DPV11's functionality, including its role as a bus request device, support for character-, byte count-, and bit-oriented protocols (such as BISYNC, DDCMP, and SDLC), and its electrical compatibility with EIA standards.
• Installation: Detailed instructions on unpacking, inspection, pre-installation jumper configurations (using the provided configuration sheet), hardware setup, and verification of operation using diagnostics like CVDPV and DEC/X11.
• Programming Information: Covers register descriptions and bit assignments for the five 16-bit registers (RXCSR, RDSR, PCSAR, PCSCR, and TDSR), data transfer methods, and interrupt vector information.
• Technical Appendices: Includes details on the diagnostic supervisor, the USYNRT chip, integrated circuit specifications, and programming examples in both bit- and byte count-oriented formats.