The text read off it
[90.02.08]
IOC REFERENCE NUMBERS
A knowledge of the 7090 IOCS is necessary in understanding most of the IOC Numbers.
SYSTEM REFERENCE — FORMAT and/or FUNCTION
IOC)1
PZE L,,N
A cell in the CT Monitor communications area which locates (L) a list of files, and designates the number (N) of files in the list. This List is used in Opening and Closing files.
IOC)2
PZE L,,12*N
A cell in the CT Monitor communication area which locates (L) a number (N) of IOCS file blocks. I/O information is kept in each of the 12 word blocks for every file in the CT program.
IOC)3 The entry point to the IOCS DEFINE subroutine.
IOC)4 The entry point to the IOCS JOIN subroutine.
IOC)5 The entry point to the IOCS ATTACH subroutine.
IOC)6 The entry point to the IOCS CLOSE subroutine.
IOC)7 The entry point to the IOCS OPEN subroutine.
IOC)8 The entry point to the IOCS READ subroutine.
IOC)9 The entry point to the IOCS WRITE subroutine.
IOC)10 The entry point to the IOCS COPY subroutine.
IOC)11 The entry point to the IOCS REWIND subroutine.
IOC)12 The entry point to the IOCS WRITE-END-OF-FILE subroutine.
IOC)13 The entry point to the IOCS BACKSPACE-RECORD subroutine.
IOC)14 The entry point to the IOCS BACKSPACE-FILE subroutine.
IOC)15 The entry point to the IOCS CHECKPOINT subroutine.
IOC)16 The entry point to the IOCS STASH subroutine.
IOC)17 The entry point to the IOCS MESSAGE-WRITER subroutine.
IOC)29 This is a 14 word area within IOCS which is used to process all labels.