求此匯編程序的注釋

ID:57569 · 發(fā)表于 2013-12-17 20:46

誰(shuí)能幫我解析下面每條代碼的意思啊{:soso_e118:}
   TIM EQU 30H
   CNTA EQU 31H
   CNTB EQU 32H

   ORG 00H
   LJMP START
   ORG 0BH
   LJMP T0X
   ORG 30H
START: MOV TIM,#00H
   MOV CNTA,#00H
   MOV CNTB,#00H
   MOV TMOD,#01H
   MOV IE,  #82H
   MOV TH0,#(65536-4000)/256
   MOV TL0,#(65536-4000) MOD 256
   SETB TR0
   SJMP $

T0X: MOV TH0,#(65536-4000)/256
   MOV TL0,#(65536-4000) MOD 256
   MOV DPTR,#TAB
   MOV A,CNTA
   MOVC A,@A+DPTR
   MOV P3,A
   MOV DPTR,#DIGIT
   MOV A,CNTB
   MOV B,#8
   MUL AB
   ADD A,CNTA
   MOVC A,@A+DPTR
   MOV P0,A
   INC CNTA
   MOV A,CNTA
   CJNE A,#8,NEXT
   MOV CNTA,#00H
   LJMP T0X

NEXT:  INC TIM
   MOV A,TIM
   CJNE A,#250,NEX
   MOV TIM,#00H
   INC CNTB
   MOV A,CNTB
   CJNE A,#4,NEX
   MOV CNTB,#00H
NEX: RETI

TAB: DB 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH
DIGIT: DB 00H,7CH,10H,10H,10H,10H,7CH,00H
   DB 00H,36H,49H,41H,22H,14H,08H,00H
   DB 00H,24H,24H,24H,24H,24H,3CH,00H
   DB 00H,00H,00H,7CH,00H,00H,00H,00H

   END

ID:1 · 發(fā)表于 2013-12-19 00:46

我建議你去看看這個(gè) 單片機(jī)教程
http://www.torrancerestoration.com/mcuteach/252.html 里面有詳細(xì)的解釋

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求此匯編程序的注釋

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