SYSCSS - Common System Subroutines

This document is an assembly language listing, dated August 9, 1965, for "SYSCSS - Common System Subroutines". It provides the code and details for several system-level routines. Key subroutines defined include: DATE (to return the current system date), TIMER (to return the system's run time in 60ths of a second), SWITCH (to return data switches), STOAC (to store data in the user's accumulator), and DVCHR (to provide device characteristics, including searching for devices, checking user ownership, and acquiring job numbers). The document also outlines a HASH routine for computing an XOR hash type index from names, routines for setting DDT and POV pointers (SETDDT, SETPOV), and a WAIT routine to manage I/O channel inactivity until operations are complete. The listing concludes with a comprehensive symbol table that details internal and external identifiers used across these subroutines.