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EORA
Operation:
(A)
Description:
Performs the logical exclusive OR between the content of accumulator
A and the content of memory location M. The result is placed in A. Each
bit of A after the operation is the logical exclusive OR of the correspond-
ing bits of M and A before the operation.
Condition Codes and Boolean Formulas:
S
–
N:
Z:
V:
Addressing Modes, Machine Code, and Execution Times:
Source Form
EORA # opr8i
EORA opr8a
EORA opr16a
EORA oprx0_xysp
EORA oprx9,xysp
EORA oprx16,xysp
EORA [D ,xysp ]
EORA [ oprx16,xysp ]
CPU12
REFERENCE MANUAL
Exclusive-OR A
⊕
(M) ⇒ A
X
H
I
N
Z
∆
∆
–
–
–
Set if MSB of result is set; cleared otherwise.
Set if result is $00; cleared otherwise.
0; Cleared.
Address Mode
IMM
DIR
EXT
IDX
IDX1
IDX2
[D,IDX]
[IDX2]
INSTRUCTION GLOSSARY
V
C
0
–
Object Code
88 ii
98 dd
B8 hh ll
A8 xb
A8 xb ff
A8 xb ee ff
A8 xb
A8 xb ee ff
EORA
Cycles
Access Detail
1
P
3
rfP
3
rOP
3
rfP
3
rPO
4
frPP
6
fIfrfP
6
fIPrfP
MOTOROLA
6-87
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