RCA 70/46 Reference Manual page 140

Load
Positive
(LPR)
General Description
Format
(RR)
Condition Code
Interrupt Action
Notes
Fixed-Point
Instructions
• The operand in the register specified by the second address (R
2 )
is
made positive, if negative, and loaded into the general register specified by
the first address (R
1 ) .
In loading the absolute value of the operand, nega-
tive numbers are complemented and positive numbers remain unaltered.
The magnitude of the absolute value determines the condition code.
10
Rl R2
0
7
8
11
12 16
•
o -
result is zero.
1-not used.
2 -- result greater than zero.
3 - overflow on complement.
•
Fixed-point overflow.
• 1. A fixed-point overflow interrupt exists if a maximum negative num-
ber is complemented.
2. The operand specified by the second address is unaltered.
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