IBM System/370 Operator's Reference Manual page 49

System/370 Model 145 (cont'd)
Alter/Display Chart
STORAGE
ALTER DISPLAY ADDRESS
AREA
MNEMONIC
MNEMONIC RANGE
MAIN STORAGE AM DM OOOOOO-OFFFFF*
STORAGE KEY AK OK
OOOOOO-OF FFF F'
CONTROL REGISTER AC DC
O-F
GENERAL
AG DG O-F
REGISTER
FLOATING-POINT
AF DF 0,2,4,6
REGISTER
CURRENT PSW AP
DP None required
STORE STATUS
NONE ST None required
VIRTUAL STORAGE
AV
DV OOOOOO-FF F FF F
'The upper boundary is movable and depends
upon the capacity of main storage.
To Alter Ragisten, PSW, and Main Storage
1.
Alter operations can be performed from the PR-KB. Press the STOP key or
set the RATE switch to either INSTRUCTION STEP or SINGLE CYCLE
HARD STOP.
2. Press the ALTER/DISPLAY key.
3.
Wait for both the ALTER/DISPLAY MODE and PROCEED indicators to
turn
on.
4. Select
the appropriate 2-character mnemonic from the Alter/Display chart
and type the mnemonic and address of the information to be altered.
5. Enter data, 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 space bar is operated.
6. To end the alter operation, press the ALTER/DISPLAY key or the END
key.
7.
To resume program processing, retul)1 the RATE switch to PROCESS and
press the START key.
To Stop on Main Storage Address
1.
Press STOP key. MAN indicator comes on.
2.
Set
STORAGE SELECT switch to MAIN STORAGE position.
3. Set
main storage address in STORAGE SELECT rotary switches CDEFGH.
4. Set
ADDRESS COMPARE to ANY. NOTE: To guarantee a match on in-
!<truction address!!!', the I·COUNTI'R rosition Ireal or logicall
mil'" ,,~ , ... ~
5. Set
ADDRESS COMPARE CONTROL toggle switch to STOP.
6. Press START key.
TO Clear Main Storage
1. Hold the ENABLE SYSTEM CLEAR key in the operated position.
2. Press the SYSTEM RESET or LOAD key.
3.
Release the ENABLE SYSTEM CLEAR key.
Hard Stop Option
On getting a red light error and at the suggestion of service personnel:
1.
Set CHECK CONTROL switch to STOP AFTER LOG. The LOG PRES
indicator comes on after an error occurs and the machine stops.
2. IPL the SEREP deck and save printout for CEo
3.
Press SYSTEM RESET and begin operating.
4.
Should second error occur, call CEo
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