Asynchronous Serial Interface for Connecting a PDP-11to the ARPANET (BBN 1822).

摘要

This report describes an interface to permit the connection of any PDP-11 to either the Packet radio network or the ARPAnet. The interface connects to an IMP on one side, meeting the specifications published in BBN report number 1822, and to a 16 bit parallel interface (DRV-11 or DR11-C) as described in the DEC peripherals and interfacing handbook. The interface card itself is a double height board (5.2in.x8.5in.) which can be plugged into any peripheral slot in a PDP-11 backplane. The interface card is connected to the parallel interface card via two cables with Berg 40 pin connectors (DEC H-856) and to the IMP via an Amphenol bayonet connector (48-10R-18-31S). All 3 cables and connectors are supplied with the I/O interface card. The parallel interface card (DEC DR11-C or DRV-11) together with the special I/O interface card described in this report comprise the 1822 interface. The report includes descriptions of the operation of circuits, programming, and diagnostics for the 1822 interface. (Author)