Kl8/e Asynchronous Data Control

This document provides comprehensive engineering specifications, circuit schematics, and configuration instructions for the Digital Equipment Corporation (DEC) KL8/E Asynchronous Data Control board, designed for use with the PDP-8/E computer.

The KL8/E is a single quad-board interface that facilitates connections for devices such as teleprinters. The document details:

• Configurations: Various options for baud rates (ranging from 110 to 2400 baud), interface types (20mA loop or EIA), and machine variations (KL8/E through KL8/EG).
• Technical Specifications: Requirements for environment, communications variables (start/stop bits, data bits), and physical limitations like cable length.
• Circuit Functionality: Information on receiver and transmitter circuits, reader run control, and EIA signal handling.
• Programming: A list of instructions for the KL8/E, including commands to clear flags, skip on flags, and load teleprinter data.
• Device Code Selection: Technical guidance on setting device codes through physical jumper (split lug) strapping on the board to ensure unique identification on the PDP-8/E bus.
• Assembly and Maintenance: Includes detailed wiring diagrams, parts lists, and accessory lists for cable assemblies and necessary support hardware.