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ORAB
Operation:
(B)
Description:
Performs bitwise logical inclusive OR between the content of accumula-
tor B and the content of memory location M. The result is placed in B.
Each bit of B after the operation is the logical inclusive OR of the corre-
sponding bits of M and of B before the operation.
Condition Codes and Boolean Formulas:
S
–
N:
Z:
V:
Addressing Modes, Machine Code, and Execution Times:
Source Form
ORAB # opr8i
ORAB opr8a
ORAB opr16a
ORAB oprx0_xysp
ORAB oprx9 , xysp
ORAB oprx16 , xysp
ORAB [D ,xysp ]
ORAB [ oprx16,xysp ]
MOTOROLA
6-152
Inclusive OR B
+
(M) ⇒ B
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
CA ii
DA dd
FA hh ll
EA xb
EA xb ff
EA xb ee ff
EA xb
EA xb ee ff
ORAB
Cycles
Access Detail
1
P
3
rfP
3
rOP
3
rfP
3
rPO
4
frPP
6
fIfrfP
6
fIPrfP
CPU12
REFERENCE MANUAL
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