RCA Spectra 70 - Page 137

Load Halfword
(LH)
General Description
Format
(RX)
Condition Code
Interrupt Action
Fixed-Point
Instructions
• The halfword operand in the main memory specified by the second
address (XdB2/D2) is loaded into the general register specified by the
first address (R
1
).
o 7 8 11 12 15 16 19 20
31
• Unchanged.
• Address error:
Addressing.
Specification.
Notes • 1. When the halfword (second operand) is fetched from main memory,
it is expanded to a full word by propagating the sign-bit value
through the 16 high-order positions of the receiving register.
2. The operand specified by the second address is unaltered.
128