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Appendix E
Error and Arithmetic Flag Operation
The following table shows the instructions that affect the ER, CY, GT, LT and EQ flags. In general, ER indi-
cates that operand data is not within requirements. CY indicates arithmetic or data shift results. GT indicates
that a compared value is larger than some standard, LT that it is smaller, and EQ, that it is the same. EQ also
indicates a result of zero for arithmetic operations. Refer to Section 3 Instruction Set for details.
Vertical arrows in the table indicate the flags that are turned ON and OFF according to the result of the in-
struction.
Although timer and counter instructions are executed when ER is ON, instructions with a vertical arrow under
the ER column are not executed if ER is ON. All of the other flags in the following table will also not operate
when ER is ON.
Instructions
0311 (ER)
0312 (CY)
0313 (LT)
0314 (EQ)
0315 (GT)
TIM
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
CNT
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
END(01)
OFF
OFF
OFF
OFF
OFF
STEP(04)
Unaffected
Unaffected
Unaffected
Unaffected
SNXT(05)
Unaffected
Unaffected
Unaffected
Unaffected
TIMM(20)
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
TIMH(21)
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
ATIM(22)
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
RDM(23)
Unaffected
Unaffected
Unaffected
Unaffected
CNTH(24)
Unaffected
Unaffected
Unaffected
Unaffected
ATM1(25)
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
ATM2(26)
Unaffected
Unaffected
Unaffected
Unaffected
Unaffected
MOV(30)
Unaffected
Unaffected
Unaffected
MVN(31)
Unaffected
Unaffected
Unaffected
CMP(32)
Unaffected
SFT(33)
Unaffected
Unaffected
Unaffected
Unaffected
BCMP(34)
Unaffected
Unaffected
Unaffected
Unaffected
ADD(40)
Unaffected
Unaffected
SUB(41)
Unaffected
Unaffected
ANDW(42)
Unaffected
Unaffected
Unaffected
ORW(43)
Unaffected
Unaffected
Unaffected
CLC(44)
Unaffected
OFF
Unaffected
Unaffected
Unaffected