AC Shifter

This document outlines the specifications for the M227 AC Shifter module. The M227 provides 9 bits of an accumulator with input gating and shifting logic. Two such modules are used in the PDP-15 central processor to create an 18-bit accumulator shift register, which is used for data manipulation and temporary storage. The document includes technical details on input load requirements, output drive capability (10 TTL unit loads), and power dissipation (5V at 420 mA maximum).