December 2001 Commands 7 – 89
Word processing
with the LOAD NOT
command
Syntax: LN (LOAD NOT)
Operands: B, W, D, K
Action:
Load the complement of the addressed operand, or of a constant, into the
word accumulator. If necessary, the accumulator is supplemented with the
correct algebraic sign. In contrast to logical operations, you must always begin
a sequence of word gating operations with an L command. You cannot replace
the L command with a logical gating instruction.
Example:
Gate the complement of byte B6 and byte B5 with AND, and assign the result
to byte B8.
Initial state:
Byte B5 = 2A (hex)
Byte B6 = B6 (hex)
Byte B8 = ?
Function STL Accumulator contents [bit] Operand contents [bit]
31..15 ..................... 7 ................. 0 7 ............. 0
Invert byte 6, and
load into the word
accumulator.
LN B6 0 ..... 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 10110110
Gate the contents of
word accumulator
and byte B5 with
AND.
A B5 0 ..... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 00101010
Assign the gating
result to byte B8.
= B8 0 ..... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 00001000
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