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5-19-10 DOUBLE BCD MULTIPLY – MULL(56)
Md: First multiplicand word (BCD)
IR, SR, AR, DM, HR, TC, LR
Mr: First multiplier word (BCD)
IR, SR, AR, DM, HR, TC, LR
Ladder Symbols
Operand Data Areas
R: First result word
IR, SR, AR, DM, HR LR
MULL(56)
Md
Mr
R
@MULL(56)
Md
Mr
R
Limitations Md and Md+1 must be in the same data area, as must Mr and Mr+1.
R through R+3 must be in the same data area.
Description When the execution condition is OFF, MULL(56) is not executed. When the
execution condition is ON, MULL(56) multiplies the eight-digit content of Md and
Md+1 by the content of Mr and Mr+1, and places the result in R to R+3.
Md + 1 Md
Mr + 1 Mr
R + 1 RR + 3 R + 2
x
Flags ER: Md, Md+1,Mr, or Mr+1 is not BCD.
Indirectly addressed DM word is non-existent. (Content of DM word is
not BCD, or the DM area boundary has been exceeded.)
EQ: ON when the result is 0.
5-19-11 BCD DIVIDE – DIV(33)
Dd: Dividend word (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Ladder Symbol
Dr: Divisor word (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Operand Data Areas
DIV(33)
Dd
Dr
R
R: First result word (BCD)
IR, SR, AR, DM, HR, LR
Limitations R and R+1 must be in the same data area.
Description When the execution condition is OFF, DIV(33) is not executed and the program
moves to the next instruction. When the execution condition is ON, Dd is divided
by Dr and the result is placed in R and R + 1: the quotient in R and the remainder
in R + 1.
R+1 R
DdDr
QuotientRemainder
BCD Calculations Section 5-19