Browse Prior Art Database

New Display Commands

IP.com Disclosure Number: IPCOM000079789D
Original Publication Date: 1973-Sep-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 4 page(s) / 116K

Publishing Venue

IBM

Related People

Fumagalli, FU: AUTHOR

Abstract

Four new operator's commands are described. Three of them are used to display some information which is available to the operating system (OS), but not to the operator, using the normal 0S commands; the fourth is particularly useful when, in a multitasking environment, a running task must be immediately stopped without cancelling it. (Image Omitted)

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New Display Commands

Four new operator's commands are described. Three of them are used to display some information which is available to the operating system (OS), but not to the operator, using the normal 0S commands; the fourth is particularly useful when, in a multitasking environment, a running task must be immediately stopped without cancelling it.

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This command is used to require the display of the boundaries of the fixed parts of main storage (i.e. the ones allocated to the operating system). The keywords mean: NUC to display the OS nucleus boundary SQA to display the system queue area boundary DYN to display the dynamic area boundary MAX to display the size of the maximum contiguous free core available to a new task.

UNL to display the total amount of free bytes in the system queue area when the command

has the format UD CORE the complete information is

displayed.
2) UD jobname

his command is used to require the display of a message

informing of

the status of the specified job.
3) UD SPACE, cuu

where cuu is the address of a direct access I/O device. This

command

is used to require a display of the free space (available for

allocation) on the volume mounted on the device.

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this command is used to stop (and subsequently to restart) a running task identified by its jobname.

Output format. All messages are sent to the operator's console and have the following format:

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