RQDX1 Controller Module

This document provides comprehensive information on the RQDX1 disk drive controller module, which interfaces RD51 fixed disk drives and RX50 diskette drives with LSI-11 bus systems. It covers environmental and functional specifications, hardware configuration via jumpers, installation procedures including the use of the RQDX1-E extender module, register definitions for LSI-11 addressability, error detection using diagnostic LEDs, and details on Mass Storage Control Protocol (MSCP) and Diagnostics and Utilities Protocol (DUP).