如下程序为什么无法正常运行该电路图

org 0000h
sjmp start
org 0008h
ajmp intt0
ORG 0030H
start: mov tmod,#01h
mov th0,#3ch
mov tl0,#0b0h
setb et0
setb ea
mov r7,#20
mov r6,#0ffh
mov r5,#08
setb f0
LOOP: ORL p1,#03H
MOV A,P1
JNB ACC.0,ONE
JB ACC.1,TWO
BACK: ACALL D10S
AJMP LOOP
ONE: JNB ACC.1,THREE
CLR 93H
SETB 92H
FOUR: SJMP FOUR
THREE: CLR p1.2
setb tr0
sjmp $
AJMP BACK
TWO: SETB 92H
setb tr0
sjmp $
AJMP BACK
org 100h
D10S: MOV R3,#19H
LOOP3: MOV R1,#85H
LOOP1: MOV R2,#0FAH
LOOP2: DJNZ R2,LOOP2
DJNZ R1,LOOP1
DJNZ R3,LOOP3
RET
intt0: mov th0,#3ch
mov tl0,#0b0h
djnz r7,exit
jnb f0,gs
mov r7,#20
push acc
mov acc,r6
clr c
rlc a
mov r6,a
mov p2,a
pop acc
djnz r5,exit
mov r7,#20
mov r5,#08
clr tr0
clr f0
exit: reti
gs: mov r7,#20
setb c
push acc
mov a,r6
rrc a
mov p2,a
mov r6,a
pop acc
djnz r5,exit
mov r7,#20
mov r5,#08
clr tr0
setb f0
END

是指什么？