DL205 User Manual, 4th Edition, Rev. B
5–116
Chapter 5: Standard RLL Instructions - Math
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A
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Divide by Top of Stack (DIVS)
Divide Top of Stack is a 32-bit instruction that divides the
8-digit BCD value in the accumulator by a 4-digit BCD
value in the first level of the accumulator stack. The result
resides in the accumulator and the remainder resides in the
first level of the accumulator stack.
NOTE:
Status flags are valid only until another instruction uses the same flag.
In the following example, when X1 is on, the Load instruction loads the value in V1400 into
the accumulator. The value in V1420 is loaded into the accumulator using the Load Double
instruction, pushing the value previously loaded in the accumulator onto the accumulator
stack. The BCD value in the accumulator is divided by the BCD value in the first level of the
accumulator stack using the Divide Stack instruction. The Out Double instruction copies the
value in the accumulator to V1500 and V1501.
ý
ý
ý
þ
230
240
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5
0
-1
2
6
0
D
I
V
S
Discrete Bit Flags
Description
SP53
On when the value of the operand is larger than the accumulator can work with.
SP63
On when the result of the instruction causes the value in the accumulator to be zero.
SP70
On anytime the value in the accumulator is negative.
SP75
On when a BCD instruction is executed and a NON-BCD number was encountered.
LD
V1400
X1
Load the value in V1400 into
the accumulator
LDD
V1420
Load the value V1420 and
V1421 into the accumulator
OUTD
V1500
Copy the value in the
accumulator to V1500
and V1501
X X X X X X X X
Level 1
X X X X X X X X
Level 2
X X X X X X X X
Level 3
X X X X X X X X
Level 4
X X X X X X X X
Level 5
X X X X X X X X
Level 6
X X X X X X X X
Level 7
X X X X X X X X
Level 8
0 0 0 0 0 0 2 0
Level 1
X X X X X X X X
Level 2
X X X X X X X X
Level 3
X X X X X X X X
Level 4
X X X X X X X X
Level 5
X X X X X X X X
Level 6
X X X X X X X X
Level 7
X X X X X X X X
Level 8
DIVS
Divide the value in the
accumulator by the value in
the first level of the
accumulator stack
Acc.
V1400
0 0 2 0
0 0 0 0
0 0 2 0
Acc.
V1420
0 0 0 0
0 0 5 0
0 0 0 0
Accumulator stack
after 1st LDD
Accumulator stack
after 2nd LDD
Acc. 0 0 0 2
5 0 0 0
0 0 0 2
5 0 0 0
V1500
V1501
The unused accumulator
bits are set to zero
Handheld Programmer Keystrokes
SHFT
ANDST
L
3
D
STR
$
SHFT
3
D
8
I
AND
V
OUT
GX
SHFT
3
D
1
B
5
F
0
A
0
A
ENT
1
B
ENT
1
B
4
E
0
A
0
A
ENT
ENT
SHFT
ANDST
L
3
D
1
B
4
E
2
C
0
A
RST
S
ENT
3
D
V1421
0 0 5 0
0 0 0 0 0 0 0 0
Level 1
X X X X X X X X
Level 2
X X X X X X X X
Level 3
X X X X X X X X
Level 4
X X X X X X X X
Level 5
X X X X X X X X
Level 6
X X X X X X X X
Level 7
X X X X X X X X
Level 8
The remainder resides in the
first stack location
Direct
SOFT
DS
Used
HPP Used