BA08 Peripheral Expander

This document provides a detailed functional description of the BA08 Peripheral Expander, an accessory designed for the PDP-8/L computer to house options that cannot be installed directly within the main chassis. It covers the physical description, logic circuit functions (including bus drivers, inverters, loads, and diode clamps), and maintenance requirements. The manual also includes tables detailing required modules and specific options supported, such as the CR8/L Card Reader, various DC02 Teletype controls, and memory extension options. Comprehensive engineering drawings and schematics are provided to assist with implementation and servicing.