gtpo1m10Operations

ZACOR-Alter Core

Use this command to change as many as 16 bytes of system virtual memory (SVM), also known as core memory.

Requirements and Restrictions

You must specify the IS parameter in a tightly coupled system when prefixing applies; for example, when you change storage in page 0 of an I-stream, or when you change the I-stream unique global areas.

Format




address
is a 1- to 8-digit (4-byte) hexadecimal SVM address.

newdata
is the new data that replaces the old data. The new data must be an even number of hexadecimal digits and cannot exceed 32 digits (16 bytes).

Valdata-olddata
verifies that olddata matches the data being changed. If there is a discrepancy, no data is changed. The olddata variable must be an even number of hexadecimal digits and cannot exceed 32 digits (16 bytes). The length of olddata can be different from the length of newdata.
Note:
If you do not specify this parameter, the data is changed without any verification.

Is-xx
specifies the I-stream that this change affects, where xx is a decimal number from 1 to 16.

Additional Information

Examples

In the following example, 4 bytes of data in the prefix area of I-stream 1 are changed.

+--------------------------------------------------------------------------------+
|User:   ZACOR 900 41EE0001                                                      |
|                                                                                |
|System: ACOR0010I 15.28.54 BEGIN DISPLAY                                        |
|         00000900- 00000000 00000000 00000000 00000000 ........ ........        |
|         00000910- 00000000 00000000 00000000 00000000 ........ ........        |
|        ALTERED TO-                                                             |
|         00000900- 41EE0001 00000000 00000000 00000000 ........ ........        |
|         00000910- 00000000 00000000 00000000 00000000 ........ ........        |
|        END OF DISPLAY - ZEROED LINES NOT DISPLAYED                             |
+--------------------------------------------------------------------------------+

Related Information

See TPF Main Supervisor Reference for more information about system virtual memory (SVM).