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INSTRUCTION SET
Example: INP12: IN A,P1
MOV
R6,A
IN A,P2
;INPUT
PORT 1
CONTENTS
;TO
ACC
;MOVE
ACC
CONTENTS
TO
;REG 6
;INPUT
PORT 2
CONTENTS
;TO
ACC
MOV
R7,A
;MOVE
ACC
CONTENTS
TO
REG 7
INC A Increment Accumulator
10001101111
The
contents
of
the
accumulator
are incremented
by one.
(A)--
(A)+1
Example:
Increment
contents
of
location
100 in external
data memory.
INCA:
MOV
RO,#100
;MOVE '100' DEC
TO
ADDRESS
;REG 0
MOVX
A,@RO
;MOVE
CONTENTS
OF
LOCATION
;100
TO
ACC
INC
A
;INCREMENT
A
MOVX
@RO,A
;MOVE
ACC
CONTENTS
TO
;LOCATION
100
INC
Rr
Increment Register
1000111rrri
The
contents
of
working
register
Or'
are incremented
by
one.
r=0-7
(Rr)--
(Rr)+1
Example: INCRO:
INC
RO
;INCREMENT
ADDRESS REG 0
INC @R
r
Increment Data Memory Location
100011000ri
The
contents
of
the
resident data
memory
location
addressed by register
Or'
bits 0-5*are incremented
by one.
((Rr))--
((Rr))+1 r=0-1
Example:
INCDM:
MOV R1,#03FH ;MOVE ONES
TO
REG 1
INC
@R1
;INCREMENT
LOCATION
63
Mnemonics
copyright
Intel
Corporation
1976.
4-17
'0-6
.Ior
8039/8049