我小白一个，这一段是让8位数码管从右至左显示P字符，延时0.5秒，我怎么改能让他从左至右显示呢？不改原理图的情况下。谢谢！
ORG 0000H
AJMP MAIN
ORG 0100H
MAIN:NOP
mov 70H, #10H
mov 71H, #10H
mov 72h, #10h
mov 73h, #10h
mov 74h, #10h
mov 75H, #10H
mov 76H, #10H
mov 77H, #10H
LOOP: ACALL DIS
AJMP LOOP
DIS: MOV R0, #77H
MOV R2, #7fH
MOV A, R2
LP0: MOV P2,A
MOV DPTR, #TABLE
MOV A, @R0
MOVC A, @A+DPTR
MOV P0, A
ACALL DLAY ;延时子程序
DEC R0
MOV A, R2
JNB Acc.0, LP1
RR A
MOV R2, A
AJMP LP0
LP1: RET
TABLE: DB 0C0H,0F9H,0A4H,0B0H,99H,92H ;共阳极段码表，按自然顺序排列
DB 82H,0F8H,80H,90H,88H,83H
DB 0C6H,0A1H,86H,8EH,8CH,0BFH,0FFH ; P , - ，空白
DLAY: mov r3,#07h ;#14h
mov tmod,#01h
loopt0:mov th0,#3ch
mov tl0,#0b0h
setb tr0
loopt1:jbc tf0,loopt2
ajmp loopt1
loopt2:djnz r3,loopt0
ret
end
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