Load Negative (Lner) (Lndr) - RCA 70/46 Reference Manual

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.
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