HEIDENHAIN TNC 306 Technical Manual - Manual (Page 344)

7-54
TNC 416/TNC 406/TNC 306 Commands 3/2000
Word execution with the EXCLUSIVE OR NOT command
Operands: B, W, D, K
Operation:
The contents of the Word Accumulator and the contents of the operand (B, W, D, K) are gated with
EXCLUSIVE OR NOT. 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 in the Accumulator is gated with bit 0 in the operand
Bit 1 in the Accumulator is gated with bit 1 in the operand and so on.
The result of the operation is stored in the Logic Accumulator.
Example:
The contents of Word W4 and Word W6 are to be gated with EXCLUSIVE OR NOT and the result
assigned to Word W8.
Initial state: Word W4 = 36 AA (hex)
Word W6 = 3C 36 (hex)
Word W8 = ?
Line Instruction Accumulator contents Operand contents
Bit 31 . . . 15 7 0 15 8 7 0
... x x x x x x x x x x x x x x x x x x
1 L W6 ... 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 1 1 0 00111100 00110110
2 XON W4 ... 1 1 1 1 1 1 0 1 0 1 0 1 1 0 0 0 1 1 00110110 10101010
3 = W8 ... 1 1 1 1 1 1 0 1 0 1 0 1 1 0 0 0 1 1 11110101 01100011
Line 1: The contents of Word W6 are loaded into the Accumulator.
Line 2: The contents of the Word Accumulator and Word W4 are gated with
EXCLUSIVE OR NOT.
Line 3: The gating result is assigned to Word W8.