Move With Offset (Mvo) - RCA 70/46 Reference Manual

MOVE with OFFSET
(MVO)
General Description
Format
(55)
Condition Code
Interrupt Action
Notes
Decimal Arithmetic
Instructions
• The operand specified by the second address (B
2
/D
2 )
is offset 4 bits to
the left (a I-digit left shift) and is placed to the left of, and adjacent to,
the low-order four bits of the operand specified by the first address (B1/D
1 ) .
If the first operand is not large enough to receive all bytes of the second
operand, the remaining bytes are ignored. If the second operand is shorter
than the first operand, the second operand is extended with high-order
zeros. The first and second operands may overlap.
F1
o
7 8 11 12 15 16 19 20 31 32 35 36 47
• Unchanged.
• Address error:
Addressing.
Protection.
•
1. Signs and digits are not checked for validity.
2. The second operand is not changed except when operands overlap.
..t
3. Processing is from right to left.
4. The initial low-order 4-bit digit of the operand specified by the first
address is left unaltered.
166