Oki MSM85C154HVS - Page 350

DESCRIPTION OF INSTRUCTIONS
343
84. ORL data address, #data (Logical OR immediate data to memory)
01000011
70
Instruction code
Data address
#data
Operation
Number of bytes
Number of cycles
Flags
(PSW)
Description
Example ORL 55H, #11H
Instruction code
: Byte 1
I7 I6 I5 I4 I3 I2 I1 I0
70
Byte 3
(data address)←(data address) OR #data:
C AC F0 RS1 RS0 OV F1 P
:
:
:
The logical OR between an 8-bit immediate data value and the
specified data address contents is determined. The result is
placed in the specified data address.
:
01000011
70
Byte 1
55H
10000100
70
3
2
01010101
70
Byte 2
Before execution
55H
10010101
70
After execution
:
a7 a6 a5 a4 a3 a2 a1 a0
70
Byte 2
00010001
70
Byte 3