Manual Store/Display Operations - IBM System/370 145 Operating Procedures Manual

• MANUAL STORE/DISPLAY OPERATIONS
• The MANUAL indicator must be on for the STORE and
DISPLAY keys to be operative. If the CPU is running,
press the STOP key to turn on the MANUAL indicator.
If the CPU is stopped and the MANUAL indicator is
not on, check that the toggle and rotary switches are in
the normal positions, and press the START key to turn
on the MANUAL indicator.
Main Storage
With the system in manual (MANUAL indicator on), store/
display of main storage is performed as follows.
1. Set the STORAGE SELECT switch to the MAIN STOR-
AG E position.
2. Set the DISPLAY ASSEMBLER OUT roller switch to
the SDBO position (position 2).
3. Dial the desired word address into rotary switches
CDEFGH.
4. For a store operation, set rotary switches A and B to the
hexadecimal byte value to be stored.
5. Press the STORE or DISPLAY key.
The addressed main storage word is dispillyed in the
DISPLAY ASSEMBLER OUT roller switch indiclltors at
the end of the store or display opcrlltion. Any byte stored
is displayed in its stored condition.
General-Purpose and Floating-Point Registers
Store or display of the registers is performed as follows.
1.
Set the STORAGE SELECT switch to the LOCAL
STORAG E position.
2. Dial the word address of the desired register into
console switches F and G (see chart).
3. For store operations, set the value to be stored in
switches A and B.
4. Set the byte address at which the data is to be stored
in switch H (only the two low-order bits of switch H
designate the byte). For example, if switch H is set to
C (1100 binary), byte zero is selected.
5. Press the STORE or DISPLAY key.
The register addressed by switches F and G is displayed
in the A REG ISTER D ISPLA Y roller switch indicators at
the end of the store or display operation.
WORD
REGISTER DISPLAYED
ADDR
00 General-Purpose Register
0
01
General-Purpose Register
1
02
General-Purpose Register
2
03
General-Purpose Register
3
04
General-Purpose Register
4
05 General-Purpose Register
5
06
General-Purpose Register
6
07
General-Purpose Register
7
08
General-Purpose Register
8
09 General-Purpose Register
9
OA General-Purpose Register A
OB
General·Purpose Register B
OC Gunural·Purpose Ruoistcr C
00
GUllurul·Purpose Reoistcr 0
OE Gunerul·Purpose Register E
OF General-Purpose Register F
30
Floating-Point Register
0
31
Floating-Point Register
0
32 Floating-Point Register
2
33
Floating-Point Register
2
34
Floating-Point Register
4
35 Floating-Point Register
4
36 Floating-Point Register
6
37 Floating-Point Register
6
Operating Procedures
41