335
Binary Calculation Instructions Section 5-22
Description MBS(––) multiplies the signed binary content of two words and outputs the 8-
digit signed binary result to R+1 and R. The rightmost four digits of the result
are placed in R, and the leftmost four digits are placed in R+1.
Note Refer to 1-7 Calculating with Signed Binary Data for more details.
Flags ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
EQ: ON when the result is 0000 0000, otherwise OFF.
Example In the following example, MBS(––) is used to multiply the signed binary con-
tents of DM 0010 with the signed binary contents of DM 0012 and output the
result to DM 0100 and DM 0101.
5-22-8 DOUBLE SIGNED BINARY MULTIPLY – MBSL(––)
Limitations Md and Md+1 must be in the same data area, as must Mr and Mr+1.
R and R+3 must be in the same data area.
DM 6143 to DM 6655 cannot be used for R.
Md
Mr
R +1 R
X
MBS(−−)
DM 0010
DM 0012
DM 0100
Address Instruction Operands
00000 LD 00100
00001 MBS(−−)
DM 0010
DM 0012
DM 0100
00100
Md: DM 0010
1 5 B 1
Mr: DM 0012
F C 1 3
R: DM 0100
D 8 2 3
X
R+1: DM 0101
F F A A
(5,553)
(−1,005)
(−5,580,765)
Md: First multiplicand word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
Mr: First multiplier word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
Ladder Symbols
Operand Data Areas
R: First result word
IR, SR, AR, DM, EM, HR, LR
MBSL(−− )
Md
Mr
R
@MBSL(−− )
Md
Mr
R
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