370
Symbol Math Instructions Section 3-10
Operand Specifications
Description *(420) multiplies the signed binary values in Md and Mr and outputs the result
to R, R+1.
Flags
Precautions When *(420) is executed, the Error Flag will turn OFF.
If as a result of the multiplication, the content of R is 0000 hex, the Equals
Flag will turn ON.
If as a result of the multiplication, the content of the leftmost bit of R+1 and R
is 1, the Negative Flag will turn ON.
Area Md Mr R
CIO Area CIO 0 to CIO 6143 CIO 0 to
CIO 6142
Work Area W0 to W511 W0 to W510
Holding Bit Area H0 to H511 H0 to H510
Auxiliary Bit Area A0 to A959 A448 to A958
Timer Area T0000 to T4095 T0000 to T4094
Counter Area C0000 to C4095 C0000 to C4094
DM Area D0 to D32767 D0 to D32766
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0000 to #FFFF (binary)
&0 to &65535 (unsigned decimal)
−32768 to 32767 (signed decimal)
---
Data Registers DR0 to DR15 ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
R + 1 R
×
Md
Mr
(Signed binary)
(Signed binary)
(Signed binary)
Name Label Operation
Error Flag ER OFF
Equals Flag = ON when the result is 0.
OFF in all other cases.
Negative Flag N ON when the leftmost bit of the result is 1.
OFF in all other cases.
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