READ: MOV R2,#1AH
MOV R0,#40H
MOV R1,#80H
241行 JB F0,REC
MOV A,SBUF
CJNE A,30H,OUT
SETB F0
LJMP OUT
246行REC： MOV A,SBUF
MOV @R1,A
CJNE R1,#81H,OUT
CLR F0
MOV A,30H
MOV SBUF,A
DEC R2
LJMP OUT
xiuhua.asm(241): error A45: UNDEFINED SYMBOL (PASS-2)
xiuhua.asm(246): error A9: SYNTAX ERROR
xiuhua.asm(246): error A3: ILLEGAL CHARACTER
xiuhua.asm(246): error A3: ILLEGAL CHARACTER
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