DP805x Instructions set details
- 59 -
3.29. ORL
Instruction:
Function:
ORL <dest-byte>, <src-byte>
Logical OR for byte variables
Description: ORL performs the bit wise logical OR operation between the indicated
variables, storing the results in the destination byte. No flags are
affected (except P, if <dest-byte> = A).
The two operands allow six addressing mode combinations. When the
destination is the accumulator, the source can use register, direct,
register-indirect, or immediate addressing; when the destination is a
direct address, the source can be the accumulator or immediate data.
Note:
When this instruction is used to modify an output port, the value used
as the original port data will be read from the output data latch, not the
input pins.
3.29.1.
ORL A, RN
Operation: (PC) ← (PC) + 1
(A) ← (A) or (Rn)
Bytes:
Cycles:
1
1
Encoding:
0
1
0
0
1
r
r
r
3.29.2.
ORL A, DIRECT
Operation: (PC) ← (PC) + 2
(A) ← (A) or (direct)
Bytes:
Cycles:
2
2
Encoding:
0
1
0
0
0
1
0
1
direct address
All trademarks mentioned in this document
are trademarks of their respective owners.
http://www.DigitalCoreDesign.com
http://www.dcd.pl
Copyright 1999-2003 DCD – Digital Core Design. All Rights Reserved.
DCD [ DIGITAL CORE DESIGN ]
