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《單片機(jī)原理及接口技術(shù)》第三版梅麗鳳王艷秋編著的習(xí)題解答課后答案(1)-全文預(yù)覽

  

【正文】 LJMP LOOP ; L2: MOV P1, 02H ; LJMP LOOP ; L3: MOV P1, 03H ; LJMP LOOP ; L4: MOV P1, 04H ; LJMP LOOP ; 第 4 章 匯編語(yǔ)言程序設(shè)計(jì) 41 解答: ORG 0100H MOV A, 21H ADD A, 23H MOV 25H, A MOV A, 20H ADDC A, 22H MOV 24H, A RET 42 解答: ORG 0200H MOV A, 51H MOV B, 20 MUL AB MOV 53H, A MOV 52H, B MOV A, 50H MOV B, 3 MUL AB ADD A, 53H MOV 53H, A MOV A, B ADDC A, 52H MOV 52H, A RET 43 解答: ORG 0300H MOV A, DATA CJNE A, 20, LOP1 LOP1: JC LOP3 CJNE A, 50, LOP2 LOP2: JC LOP4 MOV B, 1 LJMP LOP5 LOP3: MOV B, 2 LJMP LOP5 LOP4: MOV B, 5 LOP5: MUL AB MOV FUNC, A RET 44 解答: ORG 0400H MOV A, mun+1 JNB , LOOP CLR C MOV A, num SUBB A, 01H CPL A MOV num, A MOV A, num+1 X →A 暫存 A20? A50? 2→B 5→B 1→B AB→A A→FUNC 保存結(jié)果 開(kāi)始 返回 Y N Y N 題圖 41 習(xí)題 43 流程圖 103f SUBB A, 00H CPL A MOV num+1, A LOOP: RET 45 解答: ORG 0500H MOV DPTR, JPTAB MOV A, R2 RL A JMP A+DPTR JPTAB: AJMP KEY0 AJMP KEY1 AJMP KEY2 ?? AJMP KEY15 KEY0: ? KEY1: ? KEY2: ? ?? KEY15: ? 46 解答: ORG 0600H MOV R0, 40H MOV DPTR, 2020H MOV R7, 21H LOOP: MOV A, R0 MOVX DPTR, A INC R0 INC DPTR DJNZ R7, LOOP RET 47 解答: ORG 0700H MOV DPTR, DATA MOV R7, 10 LOOP: MOVX A, DPTR ORL A, 80H MOVX DPTR, A INC DPTR DJNZ R7, LOOP RET 48 解答: ORG 0800H MOV DPTR, 3000H MOV R0, 30H MOV R7, 7 LOOP: MOVX A, DPTR MOV R0, A INC DPTR INC DPTR INC R0 DJNZ R7, LOOP RET 49 解答: ORG 0900H MOV DPTR, 1000H MOV R1, 30H MOV R7, 31H LOOP: MOVX A, DPTR MOV R1, A CLR A MOVX DPTR, A INC DPTR INC R1 DJNZ R7, LOOP RET 410 解答: ORG 0A00H MOV R1, DAT1 MOV DPTR, DAT2 MOV R6, 10H LOOP1: MOV A, R1 CJNE A, 0DH, LOOP2 LJMP LOOP3 LOOP2: MOVX DPTR, A INC R1 INC DPTR DJNZ R6, LOOP1 LOOP3: RET 411 解答: ORG 0B00H MOV DPTR, 3000H MOV R7, 100 MOV one, 00H MOV two,00H MOV three, 00H LOP1: MOVX A, DPTR JZ LOP2 JNB , LOP3 INC three LJMP LOP4 LOP2: INC two LJMP LOP4 LOP3: INC one LOP4: INC DPTR DJNZ R7, LOP1 RET 412 解答: ORG 0C00H MOV R0, 50H MOV A, 00H MOV R7, 10 LOP: ADD A, R0 INC R0 DJNZ R7, LOP MOV B, 10 DIV AB MOV 5AH, A RET 413 解答: ORG 0D00H MOV R0, 40H MOV A, R0 MOV R7, 47 LOOP: INC R0 MOV 30H, R0 CJNE A, 30H, CHK CHK: JC LOOP1 MOV A, R0 LOOP1: DJNZ R7, LOOP MOV MIN, A RET 414 解答 : ORG 0E00H START: MOV R0, 40H MOV R7, 19 CLR 00H LOOP: MOV A, R0 MOV 30H, A INC R0 MOV 31H, R0 CLR C SUBB A, R0 JNC NEXT MOV R0, 30H DEC R0 MOV R0, 31H INC R0 SETB 00H NEXT: DJNZ R7, LOOP JB 00H, START MOV R0, 40H MOV DPTR, 2020H MOV R7, 20 LOP1: MOV A, R0 MOVX DPTR, A INC R0 INC DPTR DJNZ R7, LOP1 RET 415 解答: ORG 0F00H MOV DPTR, 2020H MOV R7, 100 LOOP1: MOVX A, DPTR CJNE A, 44H, LOOP2 MOV 30H, DPL MOV 31H, DPH MOV DPTR, 20A0H MOV A, 30H MOVX DPTR, A INC DPTR MOV A, 31H MOVX DPTR, A LJMP LOOP3 LOOP2: INC DPTR DJNZ R7, LOOP1 LOOP3: RET 416 解答: ORG 1000H MOV R0, 30H MOV R1, 50H MOV R7, 20 LOP1: MOV A, R0 CJNE A, 0AH, LOP2 LOP2: JNC LOP3 ADD A, 30H LJMP LOP4 LOP3: ADD A, 37H LOP4:, A MOV R1 INC R0 INC R1 DJNZ R7, LOP1 RET 417 解答: ORG 1100H MOV R0, 40H MOV R1, 60H MOV R7, N LOP1: MOV A, R0 CJNE A, 41H, LOP2 LOP2: JNC LOP3 CLR C SUBB A, 30H LJMP LOP4 LOP3: CLR C
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