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INSTRUCTION SET
CLR
A Clear Accumulator
10010101111
The contents of the accumulator are cleared to zero.
A.-O
CLR C Clear Carry
Bit
11001101111
During normal program execution, the carry bit can
be set
to
one by the ADD, ADDC, RLC, CPL
C,
RRC,
and
DAA instructions. This instruction resets the carry bit
to
zero.
C.-O
CLR
F1
Clear
Flag
1 (Not in 8021,8022)
1
1010
101011
Flag 1
is
cleared
to
zero.
(F1)'-
0
CLR
FO
Clear
Flag
0 (Not in 8021, 8022)
1
1
00
0
101011
Flag 0 is cleared
to
zero.
(FO).-
0
CPL A Complement Accumulator
10011101111
The contents of the accumulator are complemented.
This is
strictly a one's complement. Each one is
changed
to
zero and vice-versa.
(A).-
NOT
(A)
Example: Assume accumulator contains 01101010.
CPLA: CPL A ;ACC CONTENTS ARE COMPLE-
;MENTED
TO 10010101
CPL C Complement Carry
Bit
1
1010
101111
The setting of the carry bit is complemented; one
is
changed
to
zero, and zero is changed
to
one.
(C).-
NOT
(C)
Example: Set C
to
one; current setting
is
unknown.
CT01:
CLR C ;C IS CLEARED TO ZERO
CPL C ;C IS SET TO ONE
Mnemonics copyright Intel Corporation
1976.
4-13