Rx01 Engineering Drawings

This document is a collection of engineering drawings, diagrams, and firmware documentation for the Digital Equipment Corporation RX01 Floppy Disk Drive. It includes:

• System Architecture: Assembly diagrams and component lists for the RX01 floppy disk drive, including chassis, power supplies (H771), read/write control boards (M7727), and floppy disk control boards (M7726).
• Circuit Schematics: Detailed electrical schematics for the H771 power supply, the M7727 read/write control board, and the M7726 floppy disk controller, including signal lists and pin assignments.
• Firmware Listing: Comprehensive assembly-level firmware code for the floppy disk controller (PAL10 V142A), detailing instructions, branch conditions, scratchpad register operations, and error codes.
• Component Documentation: Print set indexes and unit variation charts for different configurations of the RX01 system, as well as maintenance print set references for plenum and fan assemblies.