HEIDENHAIN TNC 426 PB/M Technical Manual page 938

Word processing
with the LOAD NOT
command
Function
Invert byte 6, and
load into the word
accumulator.
Gate the contents of
word accumulator
and byte B5 with
AND.
Assign the gating
result to byte B8.
December 2001
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 = ?
STL Accumulator contents [bit]
31..15 ..................... 7 ................. 0
LN B6 0 ..... 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1
A B5 0 ..... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
= B8 0 ..... 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
Commands
Operand contents [bit]
7 ............. 0
1 0 1 1 0 1 1 0
0 0 1 0 1 0 1 0
0 0 0 0 1 0 0 0
7 – 89