Pr-Kb Manual Operations - IBM System/370 145 Operating Procedures Manual

• PR-KB MANUAL OPERATIONS
Data Entry
During a program-controlled read operation, PROCEED is
turned on when entry of data from the keyboard is re-
quired. This information is entered into the system by the
operator. The operation is ended by pressing the END key.
Alter/Display Operations
Alter/display operations are performed by the operator
from the PR-KB. The PR-KB provides a record of the op-
eration, the location(s) accessed, and the data involved.
Display operations print data from storage for inspection
by the operator. The data is not changed.
Alter operations change the stored data.
Alter/Display Procedure
1. Press the CPU STOP key
2.
Press the ALTER/DISPLAY key.
3. Wait for both ALTER/DISPLAY MODE and PROCEED
to turn on.
4.
Type the appropriate two-character mnemonic and ad-
dress of the information or register to be altered or
displayed from the following.
STORAGE ALTER DISPLAY ADDRESS
AREA MNEMONIC MNEMONIC RANGE
iviAI N STORAGE AM OM 000000-03 F F F F
STORAGE KEY AK
DK 000000-03F F F F
GENERAL-PURPOSE
AG
OG O-F
REGISTER
FLOATING-POINT
AF DF 0,2,4,6
REGISTER
CURRENT PSW AP OP None required
Alter
Data may be entered, one digit at a time, using the space-
bar to skip over positions not being altered. The data in
the skipped-over positions remains unchanged and prints
out each time the spacebar is operated. To end the alter
operation, press the ALTER/DISPLAY or END key.
5. To continue program processing, press the CPU START
key.
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Display
Data is printed starting at the address specified and
continues until the ALTER/DISPLAY or END key is
pressed.
When zeros are typed to the left of the address, the
operation is started automatically. When zeros are
not inserted, press the RETURN key.