Functional Description of the TOPS-20 MSCP Server, PHYMVR

This document provides the functional specification for the TOPS-20 MSCP server (PHYMVR). PHYMVR acts as an intelligent disk controller for the TOPS-20 MSCP driver (PHYMSC), facilitating disk access across the CI-20. The document covers:

• Architectural Position: Defines how PHYMVR interfaces with TOPS-20 as a device-independent disk driver and its reliance on the TOPS-20 Common File System.
• System Interfaces: Details the SETSPD, SMON%, and TMON% interfaces for system administrators to manage disk accessibility through ALLOW and RESTRICT commands.
• MSCP Driver Interaction: Lists supported and unsupported MSCP functions, unit flags, and controller flags.
• System Services: Outlines the interactions with PHYSIO for disk access and SCAMPI for communication services.
• Error Handling and Testing: Describes error mapping and testing procedures (DVT, PAGES, MULTIO).

The document also outlines the necessary documentation updates for related manuals (Monitor Calls, System Managers Guide, etc.) following the implementation of this server.