User guide

Chapter 20
Math Instructions
20–18
An example of clearing S:14 before executing the FRD instruction is shown
below.
When the input condition is set (1), a BCD value (from a 4-digit thumbwheel switch for example) is
moved from word N7:2 into the math register. Status word S:14 is then cleared to make certain
that unwanted data is not present when the FRD instruction is executed.
CLR
CLEAR
Dest S:14
0
FRD
FROM BCD
Source S:13
00001234
Dest N7:0
1234
APS displays S:13 and
S:14 in BCD.
MOV
MOVE
Source N7:2
4660
Dest S:13
4660
] [
I:1.0
0
0001 0010 0011 0100
0000 0100 1101 0010