1040641_20161102.asm

ORG 0000h
MOV 40h,#0
MOV 41h,#6
MOV 42h,#4
MOV 43h,#1
MOV DPTR, #Led_table

back: 
MOV R0,#40h
MOV 0E0h,#0FEh

loop: 
MOV 0E8h,A
ACALL Covled
INC R0
ACALL Delay	 
RL A
JNB ACC.4 ,back
SJMP loop

Delay:	MOV r4, #1
delay0: MOV r5, #4
delay1: MOV r6, #100
delay2: MOV r7, #100
delay3: DJNZ r7, delay3
DJNZ r6, delay2
DJNZ r5, delay1
DJNZ r4, delay0
RET 

Covled:
PUSH 0E0h
MOV 0E0h, @R0
ANL a, #0fh
MOVc a, @a+dptr															 
MOV p0, a
POP 0E0h
RET

Led_table:
DB 0c0h
DB 0f9h
DB 0A4h
DB 0B0h
DB 099h
DB 092h
DB 082h
DB 0f8h
DB 080h
DB 090h
DB 088h
DB 083h
DB 0c6h
DB 0a1h
DB 086h
DB 08eh
END