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DESCRIPTION OF INSTRUCTIONS
361
101. SWAP A (Exchange nibble in accumulator)
11000100
70
Instruction code
Operation
Number of bytes
Number of cycles
Flags
(PSW)
Description
Example SWAP A
Instruction code
: Byte 1
(A
4~7)
←
→
(A0~3):
C AC F0 RS1 RS0 OV F1 P
:
:
:
The contents of the four higher order bits (4 thru 7) of the
accumulator are exchanged with the contents of the four lower
order bits (0 thru 3)
:
11000100
70
Byte 1
Accumulator
10110100
70
1
1
Before execution
Accumulator
01001011
70
After execution
: