ETOS V5B

This document, titled ETOS V5B: System Manager's Guide, contains a list of updates and revisions for the operating system as of September 30, 1980. It provides technical documentation on various system error messages, including SCALE error messages like ?BAD NUMBER, ?FILE SPECIFICATION ERROR, and ?UNKNOWN COMMAND. Additionally, it covers runtime error messages such as ?ILLEGAL IOT, ?JMP/JMS TO NON EXISTENT FIELD, and ?% VM HLT, including recovery procedures for system halts. Finally, the document outlines several errors indicating potential system malfunctions, such as READ, SWAP, and R/W errors, with suggestions for hardware and file structure diagnostics.