可寻址的经典.asm

经典的汇编语言程序！是把书上理论的不好 理解的原理用程序表达出来！

      ORG 0000H
      LJMP MAIN
      ORG 0003H
      LJMP INT0
      ORG 0013H
      LJMP INT1
      ORG 0030H
MAIN: SETB EA
      SETB EX0
      SETB EX1
      SETB PX0
      CLR  PX1
      MOV P0,#80H
      MOV R4,#7
      MOV SP,#30H
LOOP0:LCALL YS
      MOV A,P0
      RR A
      MOV P0,A
      DJNZ R4,LOOP0
INT0: PUSH 3
      PUSH 2
      PUSH 1
      MOV A,#1111000B
      MOV R4,#7
LOOP1:MOV P1,A
      LCALL  YS
      SWAP A
      DJNZ R4,LOOP1
      MOV P1,#0FFH
      POP 1
      POP 2
      POP 3
      RETI
INT1: PUSH 3
      PUSH 2
      PUSH 1
      MOV A,#01010101B
      MOV R4,#9
      MOV P2,A
      LCALL YS
LOOP2:RR A
      MOV P2,A
      LCALL YS
      DJNZ R4,LOOP2
      POP 1
      POP 2
      POP 3
      RETI
YS:   MOV R1,#10
YS1:  MOV R2,#180      
YS2:  MOV R3,#184
      DJNZ R3,$
      DJNZ R2,YS2
      DJNZ R1,YS1
      RET
      END