DL205 User Manual, 4th Edition, Rev. D
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Chapter 5: Standard RLL Instructions
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Add Top of Stack (ADDS)
Add Top of Stack is a 32-bit instruction that adds the BCD
value in the accumulator with the BCD value in the first
level of the accumulator stack. The result resides in the
accumulator. The value in the first level of the accumulator
stack is removed and all stack values are moved up one level.
NOTE: Status flags are valid only until another instruction uses the same flag.
In the following example, when X1 is on, the value in V1400 and V1401 will be loaded into
the accumulator using the Load Double instruction. The value in V1420 and V1421 is loaded
into the accumulator using the Load Double instruction, pushing the value previously loaded
in the accumulator onto the accumulator stack. The value in the first level of the accumulator
stack is added with the value in the accumulator using the Add Stack instruction. The value in
the accumulator is copied to V1500 and V1501 using the Out Double instruction.
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ADDS
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 carr
SP67 On when the 32-bit addition instruction results in a carry.
SP70 On anytime the value in the accumulator is negativ.
SP75 On when a BCD instruction is executed and a NON-BCD number was encountered
LDD
V1400
X1 Load thevalue in V1400 and
V1401 into theaccumulator
LDD
V1420
Load thevalue in V1420 and
V1421 into theaccumulator
OUTD
V1500
Copy thevalue in the
accumulatortoV1500
and V1501
XXXX
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