一段小程序
ORG 0000H
LJMP MAIN
ORG 0100H
MAIN:
mov R0,#30H
mov A,@R0
ANL A,#0FH
ORL A,#30H
INC R0
MOV @R0,A
MOV A,30H
ANL A,#0F0H
SWAP A
ORL A,#30H
inc R0
mov @R0,A
sjmp $
end
编译后出现警告，如下，
WARNING L1: UNRESOLVED EXTERNAL SYMBOL
MODULE: STARTUP.obj (?C_STARTUP)
ADDRESS: 080AH
哪位大侠解释下，谢谢
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