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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Symbol Math Instructions
2
–BC/–BCL
–BC/–BCL
Applicable Program Areas
Operands
Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
BCD SUBTRACT WITH
CARRY
–BC @–BC 416
Subtracts 4-digit (single-word) BCD data and/or
constants with the Carry Flag (CY).
DOUBLE BCD SUBTRACT
WITH CARRY
–BCL @–BCL 417
Subtracts 8-digit (double-word) BCD data and/or
constants with the Carry Flag (CY).
Symbol
–BC –BCL
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description
Data type Size
–BC –BCL –BC –BCL
Mi
–BC: Minuend word
–BCL: First minuend word
WORD DWORD 1 2
Su
–BC: Subtrahend word
–BCL: First subtrahend word
WORD DWORD 1 2
R
–BC: Result word
–BCL: First result word
WORD DWORD 1 2
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
Mi, Su
OK OK OK OK OK OK OK OK OK
OK
--- --- ---
R ---
Name Label
Operation
–BC –BCL
Error Flag P_ER • ON when Mi is not BCD.
• ON when Su is not BCD.
• OFF in all other cases.
• ON when Mi and/or Mi +1 are not BCD.
• ON when Su and/or Su +1 are not BCD.
• OFF in all other cases.
Equals Flag P_EQ • ON when the result is 0.
• OFF in all other cases.
• ON when the result is 0.
• OFF in all other cases.
Carry Flag P_CY • ON when the subtraction results in a borrow.
• OFF in all other cases.
• ON when the subtraction results in a borrow.
• OFF in all other cases.
–BC(416)
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word
–BCL(417)
R
Mi
Su
Mi: 1st minuend word
Su: 1st subtrahend word
R: 1st result word