Tuesday 1 March 2016

Traffic Light Interface Using 8085

TRAFFIC LIGHT
AIM:
USING 8255 SIMULATE THE  TRAFFIC LIGHT FOR THE FOLLOWING STATES USING 8085.
State: 1-Vehicles from south should move to north, west and east directions
State: 2-Vehicles from east should move to west, north and south directions
State: 3-Vehicles from west should move to north, south and east directions
State: 4-Vehicles from north should move to south, west and east directions

Generate states opcode and simulate.


ADDRESS
OPCODE
LABEL
MNEMONICS
OPERAND
COMMENT
8800


MVI A
80

8801





8802


OUT
43H

8803





8804

AGAIN
MVI C
04H

8805





8806


LXI H
8850

8807





8808





8809

NEXT
MOV
A,M

880A


OUT
40H

880B





880C


INX
H

880D


MOV
A,M

880E


OUT
41H

880F





8810


INX
H

8811


MOV
A,M

8812


OUT
42H

8813







ADDRESS
OPCODE
LABEL
MNEMONICS
OPERAND
COMMENT
8814


INX
H

8815


CALL
DELAY

8816





8817





8818


DCR
C

8819


JNZ
NEXT

881A





881B





881C


JMP
AGAIN

881D





881E





881F

DELAY
MVI
B,0FH

8820





8821

D1
LXI
D,FFFF

8822





8823





8824

D2
NOP


8825


NOP


8826


DCX
D

8827


MOV
A,D

8828


ORA
E

8829


JNZ
D2

882A





882B





882C


DCR
B

882D


JNZ
D1

882E





882F





8830


RET



DATA
ADDRESS
OPCODE
LABEL
MNEMONICS
OPERAND
COMMENT
8850



88
STATE 1
8851



83
    ''
8852



F2
    ''
8853



83
STATE 2
8854



88
    ‘’
8855



F8
    ‘’
8856



88
STATE 3
8857



38
    ‘’
8858



F1
    ‘’
8859



38
STATE 4
885A



88
 ‘’
885B



F4
    ‘’

OBSERVATION:

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