IBM System/360 Operating Guide

ALTER READ/WRITE STORAGE
This test can be used to alter the contents of suc-·
cessive main-storage locations as follows:
1. Set the Check Control switch to Stop.
2. Press the System Reset key.
3. Enter the address of the first location to be
altered using switches F, G. H, and J, and
then Set IC ke y .
4.
Enter ROS address OBF6, using switches F, G,
Hand J, and the ROAR Reset key.
5. Enter the desired character(s) from switches
Hand J. Press the Start key for each con-
secutive byte to be altered. The microprogram
stops after each location is altered. This step
is repeated as many times as required.
ALTER A BWCK OF READ/\VRITE STORAGE
This test can be used to alter the contents of a
specified block of main storage. The character
set in switch Hand J is loaded into all locations,
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starting at the address initially set in switches F,
G, H, and J, and ending with the location addressed
by switches A, B, C, and D.
1. Set the Check Control to Stop.
2. Press the System Reset key.
3. Enter the address of the first location to be
altered, using switches F, G, H, and J, and
then press the Set IC key.
4. Enter ROS address OBF6, using switches F,
G, H, and J, and the ROAR Reset key.
5. Enter the address of the last main-storage
location to be affected from switches A, B, C,
and D.
6. Set the Address Compare switch to SAR Stop.
7. Set the ROS Control switch to Inhibit CF Stop.
8. Enter the desired character in switches Hand
J. (Use 00 to reset the block.)
9. Press the Start key. The system stops after
the location addressed by switches A, B, C,
and D has been altered.

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English