Browse Prior Art Database

End of Day Command

IP.com Disclosure Number: IPCOM000082543D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Jones, WF: AUTHOR

Abstract

The End of Day Command (EOD) is a new instruction in the CCAP/7 System/7 message handling program, which routes and processes messages between multiple terminals and a central system. The command is specified by #EXEC-EOD and permits a console operator monitoring the communications between the System/7 and multiple terminals, to cause all terminal lines to go idle at the completion of messages currently in process.

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End of Day Command

The End of Day Command (EOD) is a new instruction in the CCAP/7 System/7 message handling program, which routes and processes messages between multiple terminals and a central system. The command is specified by #EXEC-EOD and permits a console operator monitoring the communications between the System/7 and multiple terminals, to cause all terminal lines to go idle at the completion of messages currently in process.

When all lines and the channel are idle, a checkpoint is written. A message is then printed on the 5028 console to notify the operator of which checkpoint area was updated and that the end of day function is complete and the system may be stopped.

The EOD command performs:

(1) The function is activated by entering the #EXEC EOD (DRUP) command on the system console. This causes the EXEC overlay to be read into memory and be executed.

(2) The EXEC overlay performs two functions, system dry up and system shutdown. The program first turns on the stop input flag (STPIP) in the system vector area and then checks to see if the 'DRUP' option was specified. If 'DRUP' is specified, the system dry up function is performed followed by the system shutdown function. If 'DRUP' is not specified, only the system shutdown is performed.

(3) System dry up: This function monitors all active terminals and channel devices and maintains control, until all messages on queue for the active terminals and channel devices have been delivered.

(4) System shutdown...