MP01910 MCA25 Cache Pager Engineering Drawings Jul84

This document is the "MCA25 Field Maintenance Print Set" from Digital Equipment Corporation (DEC), copyrighted 1984, with order number MP01910-01. It provides comprehensive field maintenance documentation for the MCA25, MCA25-AA, and MCA25-AB unit variations.

The print set includes:

• A table of contents outlining all included documents.
• A Cache Option Location Chart, detailing the physical slot assignments for various modules (e.g., M852, M856, M853, M857) within the KL10-PW system, along with installation notes.
• An Option/Serial Number Chart, listing configuration options (e.g., 50Hz, Cache Avail, Extended Addressing CPU) and their corresponding serial number sources.
• Detailed engineering documentation for various option modules, which typically includes drawing directories, component side views, schematics (e.g., for data bits, control logic, parity, power, and ground), part lists, and terminator information. The modules covered are:
  • M852 Cache Directory
  • M853 Cache Extension
  • M854 Physical Memory Address
  • M855 Paging Board (including different revisions like multiwire and etched versions, with specific rework instructions for updates)
  • M856 Cache Data
  • M857 MBOX Control #3