RM Massbus Adapter

This technical manual describes the RM adapter, an electronic assembly that serves as an interface between MASSBUS controllers and disk drive units. It covers the adapter's physical configurations, interface-level operations (including MASSBUS and drive interface signals), and detailed circuit module technical descriptions. The manual also outlines the power-up sequencing, initialization, and device selection processes, and provides specific application details and backplane jumper modifications for various disk drive models (RM02, RM03, RM05, and RM80).