Io Bus Driver Wioi

This document is a technical schematic for an "IO Bus Driver" circuit produced by the Digital Equipment Corporation in 1964. The schematic displays a repetitive circuit design consisting of six parallel channels. Each channel includes a transistor (identified as DEC 2894-1B), multiple diodes (D-662 and D-664), and resistors (68k ohm and 12k ohm). The circuit is designed to operate between a +10V supply, a ground reference, and a -15V supply. The document also includes a "Transistor & Diode Conversion Chart" and specifies that all components should be treated as proprietary, intended only for test and maintenance purposes.