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Page Description
The 'page
description' display enables you to display and,
in some cases, alter selected data in page frames in main
storage (in VSE mode only).
*DISPLAY/ALTER*
G GENERAL REGISTERS
C CONTROL REGISTERS
P CURRENT PSW
F FLOATING POINT REGS
D PAGE DESCRIPTION
S CAPACITY COUNTS
V MAIN STORAGE
*MAIN STORAGE DISPLAY*
+
PAGE UP
- PAGE DOWN
SELECTION:
D ADDRESS:
To select this display:
KEY
BBBB
*PAGE DESCRIPTION*
PROG.BITS
BBB
FRC
BBB
ACD
BBB
ADDRESS:XXXXXX
FRAME INDEX:XXXX
ADDRESS AND FRAME INDEX IN HEX, OTHER
DATA IN BINARY
1.
Type D into the 'display/alter' display next to SELECTION.
2.
Type in the main storage address in hexadecimal notation.
The leading zeros must be included.
3.
Press ENTER.
The following data in the page description can be altered:
•
Storage key
•
Programmable bits
•
Fetch protection (F) bit
•
Reference (R) bit
•
Change (C) bit
3 - 3
2
43 31 Processor Operators Guide
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