IBM System 360 Operating Manual page 21

2. Select the area of storage (to be altered) with
the rotary display-storage-selection switch
(switch E). Use the MS position for storing
into Main Storage and the AS position for storing
into Auxiliary Storage (see lower section of
Figure 2).
3. Set the address of the selected byte of storage
into rotary switches A, B, C, and D.
Note: If you are going to store a byte into auxiliary
~ge, set rotary switch A to l.S (for Local
Storage) or to the desired MPX (multiplexor storage)
position. Then set switches C and D to the address
to be used in auxiliary storage.
4. Set the byte of information to be stored in
rotary switches Hand J (hexadecimal represen-
tation of byte).
5. Press the store key (see Figure 2, lower left
portion).
6. The data byte to be stored is dis played in the
main storage data register indicators on the
2030 console. The address at which the dis-
played byte is stored is displayed in the main-
storage address register indicators (see Part 2
of Figure 3). Check these indicators to make
sure the correct data is entered onto the
desired location.
Addressing Bytes of AUxiliary Storage
In most instances, you will have no need to store
or display in auxiliary storage. The following
descriptions, however, are provided here for
reference. The other areas of auxiliary storage
are not applicable to operator use, or not used,
or used only in special situations (such as for
compatibility modes). Follow the appropriate pro-
cedure as described in the Display Information
from Storage and Store Information in Storage
sections. Use this section to determine the address
of a particular location in auxiliary storage.
1. Set rotary switch A to the desired area of
auxiliary storage (Figure 5):
Figure 5. Rotary Switch A
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