RCA 70/46 Reference Manual page 158

Store Multiple
(STM)
General Description
Format
(RS)
Condition Code
Interrupt Action
Notes
Fixed-Point
Instructions
• The operands in the set of general registers, beginning with the register
specified by the first address (R
1 )
and ending with the register specified
by the third address (R3)' are stored in main memory locations starting with
the location specified by the second address (B
2
/D
2 ) .
The second address
(BdD
2 )
refers to the main memory location where the first operand (word)
is to be stored. Storing of the operands continues in the ascending order
of the register number specified by R
1 ,
up to and including R
3 ,
storing as
many words as indicated in the main memory locations that immediately
follow the initial operand.
o
7 8 11 12 15 16 19 20
31
• Unchanged.
• Address error:
Addressing.
Specification.
Protection.
• 1.
If the same register is specified for R1 and R
3 ,
only one word is stored.
2. If
R3
is less than
R17
the register addresses wrap around from 15 to O.
For instance, all registers can be stored by making
R3
one less than
R1-
3. The operands in the set of registers designated are unaltered.
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