HEIDENHAIN TNC 426 PB/M Technical Manual page 960

Word processing
with the
EXCLUSIVE OR
command
Function
Load byte B6 into
the word
accumulator.
Gate the contents of
the word
accumulator and
byte B5 with
EXCLUSIVE OR.
Assign the gating
result to word W8.
December 2001
Syntax: XO (EXCLUSIVE OR)
Operands: B, W, D, K
Action:
Gate the contents of the word accumulator and the operand with EXCLUSIVE
OR. In accordance with the different sizes of operand (B = 8 bit; W = 16 bit; D
= K = 32 bit), 8, 16 or 32 bits will be influenced in the accumulator. Thus, bit 0
of the accumulator is gated with bit 0 of the operand, bit 1 of the accumulator
with bit 1 of the operand, etc. The TNC saves the result of the operation in the
word accumulator.
Example:
Gate the content of byte S B5 and B6 with EXCLUSIVE OR, and assign the
result to word W8.
Initial state:
Byte B5 = 2A (hex)
Byte B6 = 36 (hex)
Word W8 = ?
STL Accumulator contents [bit]
31..15 ..................... 7 ................. 0 1 5 .......... 8 7 ............ 0
L B6 0 ..... 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0
XO B5 0 ..... 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0
= W8 0 ..... 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0
Commands
Operand contents [bit]
0 0 1 1 0 1 1 0
0 0 1 0 1 0 1 0
0 0 0 1 1 1 0 0
7 – 111