Privileged Operations

This document serves as an operational guide for system managers and privileged users of the ETOS system, covering advanced management, system maintenance, and real-time programming.

Key Topics Covered:

• Privileged Operations: Explains how to acquire privileges using the PRIV command, which allows access to system-level commands, writes to SYS, and special memory manipulation functions (PEEK/POKE).
• System Commands: Details commands for system management, including BROADCAST (messaging terminals), FORCE/ECROF (remote command execution and buffer management), MOUNT/DISMOUNT (disk management), and SHUTUP (system shutdown).
• Privileged SYSCAL Functions: Outlines low-level system calls (LOCK, UNLOCK, HOOK, UNHOOK, MOUNT, DISMNT) that require privileged mode to interact directly with memory and hardware interrupts.
• Device Handling: Provides comprehensive procedures for modifying device handlers under stand-alone and virtual OS/8, including how to activate or deactivate drivers using the BUILD utility and how to manage spooling.
• System Automation: Offers instructions on automating system startup, including automatic login procedures and batch file creation for system tasks.
• Real-Time Programming: Outlines how to implement user-written real-time tasks that interact with the ETOS interrupt service, including task scheduling levels and memory management.
• Job Statistics: Explains the USAGE program, which tracks and displays cumulative runtime and connect-time statistics for system accounts.