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Individual Instruction Descriptions
4-143
Assembly Language Instructions
4.14.49 NOTAC One’s Complement Negation of Accumulator
Syntax
[label] name dest, src
[
, mod
] Clock,
clk
Word,
w
With RPT,
clk
Class
NOTAC A
n
[~], A
n
[~] [,
next A
] 1 1 n
R
+3 3
Execution [premodify AP if
mod
specified]
dest
⇐ NOT
src
PC ⇐ PC + 1
Flags Affected OF, SF, ZF, CF are set accordingly
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
NOTAC A
n
[~], A
n
[~] [,
next A
] 1 1 1 0 0
next A
A
n
0 0 0 0 1 0 A~ ~A
Description Premodify accumulator pointer if specified. Perform one’s complement of
src
accumulator and store result in
dest
accumulator.
See Also NOTACS, AND, ANDB, ANDS, OR, ORB, ORS, XOR, XORB, XORS,
NEGAC, NEGACS
Example 4.14.49.1 NOTAC A3~, A3, ––A
Predecrement accumulator pointer AP3. One’s complement (invert bits) accumulator A3 and put result
in accumulator A3~.