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2 Instructions
2-172
CP1E CPU Unit Instructions Reference Manual(W483)
–B/–BL
Applicable Program Areas
Operands
Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
BCD SUBTRACT WITHOUT
CARRY
–B @–B 414
Subtracts 4-digit (single-word) BCD data and/or
constants.
DOUBLE BCD SUBTRACT
WITHOUT CARRY
–BL @–BL 415
Subtracts 8-digit (double-word) BCD data and/or
constants.
Symbol
–B –BL
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description
Data type Size
–B –BL –B –BL
Mi
–B: Minuend word
–BL: First minuend word
WORD DWORD 1 2
Su
–B: Subtrahend word
–BL: First subtrahend word
WORD DWORD 1 2
R
–B: Result word
–BL: 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
–B –BL
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.
–B(414)
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word
–BL(415)
R
Mi
Su
Mi: 1st minuend word
Su: 1st subtrahend word
R: 1st result word