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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Symbol Math Instructions
2
+BC/+BCL
Function
+BC
+BC(406) adds BCD values in Au, Ad, and CY and outputs the result to R.
+BCL
+BCL(407) adds the BCD values in Au and Au+1, Ad and Ad+1, and CY and outputs the result to R,
R+1.
Hint
• To clear the Carry Flay (CY), execute the Clear Carry (CLC(041)) instruction.
Sample program
+
CY
RCY
(BCD)
(BCD)
(BCD)
Au
Ad
CY will turn ON
when there is a
carry.
+
R+1
CY
RCY
(BCD)
(BCD)
(BCD)
Au+1
Ad+1
Au
Ad
CY will turn ON
when there is a
carry.
+BC
D100
D110
D120
0.00
+BCL
D100
D110
D120
0.00
When CIO 0.00 is ON in the following example, D100, D110,
and CY will be added as 4-digit BCD values, and the result will
be output to D120.
When CIO 0.00 is ON in the following example, D101, D100,
D111, D110, and CY will be added as 8-digit BCD values, and
the result will be output to D121 and D120.