HEIDENHAIN TNC 306 Technical Manual - Manual (Page 319)

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TNC 416/TNC 406/TNC 306 Commands 7-29
Word execution with the LOAD NOT command
Operands: B, W, D, K
Operation:
The complement of the contents of the addressed Operand (B, W, D) or Constant (K) is loaded into
the Word Accumulator. In addition, the Accumulator is filled, if necessary, according to the sign bit.
In contrast to logic execution a word gating chain must always start with a load command. It is not
possible to use a gating command.
Example:
The complement of Byte B6 and Byte B5 is to be gated with AND and the result assigned to Byte
B8.
Initial state: Byte B5 = 2A (hex)
Byte B6 = B6 (hex)
Byte B8 = ?
Line Instruction Accumulator contents Operand contents
Bit 31 . . . 15 7 0 7 0
... x x x x x x x x x x x x x x x x x x
1 LN B6 ... 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 10110110
2 A B5 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 00101010
3 = B8 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 00001000
Line 1: The inverted contents of Byte B6 are loaded into the Word Accumulator.
Line 2:
The contents of the Word Accumulator and Byte B5 are gated with AND.
Line 3: The gating result is assigned to Byte B8.