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5-19-9 BCD MULTIPLY – MUL(32)
Md: Multiplicand (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Mr: Multiplier (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Ladder Symbols
Operand Data Areas
R: First result word
IR, SR, AR, DM, HR LR
MUL(32)
Md
Mr
R
@MUL(32)
Md
Mr
R
Limitations R and R+1 must be in the same data area.
Description When the execution condition is OFF, MUL(32) is not executed. When the exe-
cution condition is ON, MUL(32) multiplies Md by the content of Mr, and places
the result In R and R+1.
Md
Mr
R +1 R
X
Example When IR 00000 is ON with the following program, the contents of IR 013 and DM
0005 are multiplied and the result is placed in HR 07 and HR 08. Example data
and calculations are shown below the program.
MUL(32)
013
DM 0005
HR 07
00000
R+1: HR 08 R: HR 07
00083900
Md: IR 013
3356
Mr: DM 0005
0025
X
Address Instruction Operands
00000 LD 00000
00001 MUL(32)
013
DM 00005
HR 07
Flags ER: Md and/or Mr 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.)
CY: ON when there is a carry in the result.
EQ: ON when the result is 0.
BCD Calculations Section 5-19