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