S1 plus 1 key, S2 minus 1 key
Requirement: All off when powered on. Each time S1 is pressed, one more light is on; each time S2 is pressed, one less light is on. Repeat the start state after pressing 8 times.
ORG 0000H
LJMP MAIN
ORG 0003H
LJMP INT0
ORG 0013H
LJMP INT1
ORG 0030H
MAIN:SETB EA
HERE:SJMP HERE
INT0:MOV A,B
INT1:MOV A,B
Reference address：Experiment 4 External Interrupt (80C51 MCU Assembly Language Programming)
Requirement: All off when powered on. Each time S1 is pressed, one more light is on; each time S2 is pressed, one less light is on. Repeat the start state after pressing 8 times.
ORG 0000H
LJMP MAIN
ORG 0003H
LJMP INT0
ORG 0013H
LJMP INT1
ORG 0030H
MAIN:SETB EA
HERE:SJMP HERE
INT0:MOV A,B
INT1:MOV A,B
Previous article：Experiment 5 Timer (80C51 MCU Assembly Language Programming)
Next article：Experiment 3: Table Lookup, Multi-branch (80C51 MCU Assembly Language Programming)
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