Echelon Neuron - Manual (Page 102)

NOT (Not)
The NOT instruction performs a logical NOT operation on the value in TOS. The
NOT instruction uses the implicit addressing mode. This instruction clears the
Carry flag.
The NOT instruction applies to Series 3100, 5000, and 6000 devices.
Syntax:
The NOT instruction requires no operands:
NOT
Table 35 describes the attributes of the NOT instruction.
Table 35. NOT Instruction
Instruction Hexadecimal
Opcode
Instruction
Size (Bytes)
CPU Cycles
Required
Affect on
Carry Flag
NOT 3D 1 2 Cleared
Example:
The following example defines a clear_flags function. This function assumes that
flag values to be cleared are in TOS. This function uses the NOT instruction to
invert the passed flag values, then pushes a saved set of flags onto the stack,
performs a logical AND of the inverted flags and the saved flags so that the
passed flag values are cleared, then pops the updated flags to memory.
%clear_flags APEXP ; ( clrMe -- )
not ; ( !clrMe -- )
push flags ; ( flags, !clrMe -- )
and
pop flags ; ( -- )
ret ; return to caller
92 Neuron Assembly Language Instruction Statements