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Individual Instruction Descriptions
4-185
Assembly Language Instructions
4.14.87 ZAC Zero Accumulator
Syntax
[label] name dest
[
,
mod
] Clock,
clk
Word,
w
With RPT,
clk
Class
ZAC A
n
[~] [,
next A
] 1 1 n
R
+3 3
Execution [premodify AP if
mod
specified]
dest
⇐ 0
PC ⇐ PC + 1
Flags Affected ZF = 1
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ZAC A
n
[~] [,
next A
] 1 1 1 0 0
next A
A
n
0 0 0 1 1 0 0 ~A
Description Zero the specified accumulator. Preincrement or predecrement accumulator
pointer AP
n
, if specified.
See Also ZACS
Example 4.14.87.1 ZAC A2
Reset the content of accumulator A0 to zero.
Example 4.14.87.2 ZAC A1~, ++A
Preincrement AP1 by 1. Reset the content of new accumulator A1~ to zero.