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MOV A,R6 MOV B,R3 MUL AB ADD A,R4 XCH A,R6 XCH A,B ADDC A,R5 MOV R5,A MOV F0,C MOV A,R2 MUL AB ADD A,R5 MOV R5,A CLR A MOV ACC.0,C MOV C,F0 ADD A,B MOV R4,A RET

SJMP $ END

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Ô­ÑÓʱ³ÌÐò£º DLY:

MOV R3,#0A0H DL1:

MOV R4,#7DH DL2: NOP NOP

DJNZ R4,DL2 DJNZ R3,DL1 RET END

Ð޸ĺóµÄÑÓʱ³ÌÐò£º DLY:

MOV R3,#0FH DL1:

MOV R4,#7DH DL2: NOP NOP

DJNZ R4,DL2 DJNZ R3,DL1 RET END

½«0×ÖÑ­»·¸ÄΪ4×ÖÑ­»·£º Ð޸ĺóµÄ×Ó³ÌÐò ROUT0:

MOV 20H,#99H MOV A,20H MOV R0,#0DCH MOV R1,#0DDH MOVX @R0,A MOV A,#01H

LP0: MOVX @R1,A ACALL DLY RL A SJMP LP0

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ORG 0

-13-

MOV 20H,#04H MOV R0,#20H MOV A,@R0

MOV DPTR,#TAB LOOP:JMP @A+DPTR TAB: AJMP ROUT0 AJMP ROUT1 AJMP ROUT2 AJMP ROUT3 ROUT0:

MOV 20H,#0C0H MOV A,20H MOV R0,#0DCH MOV R1,#0DDH MOVX @R0,A MOV A,#01H

LP0: MOVX @R1,A ACALL DLY RL A

SJMP LP0 ROUT1:

MOV 20H,#0F9H MOV A,20H MOV R0,#0DCH MOV R1,#0DDH MOVX @R0,A MOV A,#01H LP1:

MOVX @R1,A ACALL DLY RL A

SJMP LP1 ROUT2:

MOV 20H,#0A4H MOV A,20H MOV R0,#0DCH MOV R1,#0DDH MOVX @R0,A MOV A,#01H LP2:

MOVX @R1,A ACALL DLY RL A

SJMP LP2 ROUT3:

MOV 20H,#0B0H

-14-

MOV A,20H MOV R0,#0DCH MOV R1,#0DDH MOVX @R0,A MOV A,#01H LP3:

MOVX @R1,A ACALL DLY RL A

SJMP LP3 DLY:

MOV R3,#0A0H DL1:

MOV R4,#7DH DL2: NOP NOP

DJNZ R4,DL2 DJNZ R3,DL1 RET END

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