RCA 70/46 - Load Negative (LNER) (LNDR)

Load Negative
(LNER) (LNDR)
General Description
Format
(RR Short)
(RR Long)
Condition Code
Interrupt Action
Notes
Floating-Point InsfJructions
•
The operand in the floating-point register specified by the second address
(R
2
)
is loaded into the floating-point register specified by the first address
(R
1
)
and the operand sign is made minus.
(LNER) 31
o 7 8
11 12 15
(LNDR) 21
o
7 8
11 12 15
• 0 - result mantissa is zero.
1 -
result mantissa is less than zero.
2-not used.
3-not used.
• Address error:
Specification.
• 1. The exponent and mantissa are unaltered.
2.
Short operands do not alter the low-order half of the register specified
by the first address.
209