; VIET CT TAO HIEU UNG QUAY LED: SANG TU TRAI SANG PHAI SAU TIME 1S VA LAP LAI ; DUNG CT CON DL1S VIET O TREN ORG 2000H MOV A,#7FH; 0111 1111: SANG DEN BEN TRAI NHAT MAIN: MOV P1,A ACALL DL1S RR A; 1011 1111:LENH SANG DEN BEN PHAI SJMP MAIN DL1S: MOV R7,#10 L1: MOV R6,#200 L2: MOV R5,#250 DJNZ R5,$ DJNZ R6,L2 DJNZ R7,L1 RET END