DL205 User Manual, 4th Edition, Rev. B
5–88
Chapter 5: Standard RLL Instructions - Math
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A
B
C
D
Math Instructions
Add (ADD)
Add is a 16-bit instruction that adds a BCD value in the
accumulator with a BCD value in a V-memory location
(Aaaa). (You cannot use a constant (K) as the BCD value in
the box.) The result resides in the accumulator.
NOTE:
The status flags are only valid until another instruction that uses the same flags is executed.
In the following example, when X1 is on, the value in V2000 will be loaded into the
accumulator using the Load instruction. The value in the lower 16 bits of the accumulator are
added to the value in V2006 using the Add instruction. The value in the accumulator is
copied to V2010 using the Out instruction.
ADD
A aaa
Direct
SOFT
Handheld Programmer Keystrokes
LD
V2000
X1
Load the value in V2000 into
the lower 16 bits of the
accumulator
ADD
V2006
Add the value in the lower
16 bits of the accumulator
with the value in V2006
OUT
V2010
Copy the value in the lower
16 bits of the accumulator to
V2010
V2010
V2000
4 9 3 5
7 4 3 5
0 0 0 0 4 9 3 5
+
2 5 0 0
Acc.
7 4 3 5
(V2006)
(Accumulator)
The unused accumulator
bits are set to zero
SHFT
ANDST
L
3
D
STR
$
SHFT
0
A
3
D
3
D
OUT
GX
SHFT
AND
V
2
C
0
A
1
B
0
A
ENT
1
B
ENT
2
C
0
A
0
A
0
A
ENT
2
C
0
A
0
A
ENT
6
G
þ
þ
þ
þ
230
240
250-1
260
Operand Data Type
DL230 Range
DL240 Range DL250-1 Range DL260 Range
A
aaa
aaa
aaa
aaa
V-memory V
All
See memory map
All
See memory map
All
See memory map
All
See memory map
Pointer P
-
All V-memory.
See memory map
All V-memory.
See memory map
All V-memory.
See memory map
Discrete Bit Flags
Description
SP63
On when the result of the instruction causes the value in the accumulator to be zero
SP66
On when the 16 bit addition instruction results in a carry
SP67
On when the 32 bit addition instruction results in a carry
SP70
On anytime the value in the accumulator is negative
SP75
On when a BCD instruction is executed and a NON-BCD number is encountered
DS
Used
HPP Used
