【正文】 實(shí)驗(yàn)系統(tǒng) 配套計(jì)算機(jī) 五、預(yù)習(xí)要求：（1） 閱讀教科書中8031的指令系統(tǒng)及程序的設(shè)計(jì)方法，重點(diǎn)掌握算術(shù)運(yùn)算，轉(zhuǎn)移等指令。 三、實(shí)驗(yàn)硬件電路 ORG 0000H MOV 78H,01H MOV 79H,01H MOV 7AH,01H MOV 7BH,01H MOV 7CH,01H MOV 7DH,01H MOV DPTR,0FF20H MOV A,03H MOVX DPTR,A KEY1: ACALL KS1 JNZ LK1 NI: ACALL DIS AJMP KEY1 LK1: ACALL DIS ACALL DIS ACALL KS1 JNZ LK2 ACALL DIS AJMP KEY1 LK2: MOV R2,0FEH MOV R4,00H LK4: MOV DPTR,0FF21H MOV A,R2 MOVX DPTR,A INC DPTR INC DPTR MOVX A,DPTR JB , LONE MOV A,00H AJMP LKP LONE: JB , LTRE MOV A,08H AJMP LKP LTRE: JB , NEXT MOV A,18H LKP: ADD A,R4 MOV DPTR,TAB MOVC A,A+DPTR PUSH ACC LK3: ACALL DIS ACALL KS1 JNZ LK3 POP ACC MOV 78H,79H MOV 79H,7AH MOV 7AH,A NEXT: INC R4 MOV A,R2 JNB , KND RL A MOV R2,A AJMP LK4 TAB: DB 07H,04H,08H,05H,09H,06H,0AH,0BH DB 01H,00H,02H,0FH,03H,0EH,0CH,0DH KND: AJMP KEY1 KS1: MOV DPTR,0FF21H MOV A,00H MOVX DPTR,A INC DPTR INC DPTR MOVX A,DPTR CPL A ANL A,0FH RET DIS: MOV R0,78H MOV R3,20H MOV A,R3 LD0: MOV DPTR,0ff21H MOVX DPTR,A INC DPTR MOV A,R0 ADD A,0DH MOVC A,A+PC MOVX DPTR,A ACALL DL1 INC R0 MOV A,R3 JB ,LD1 RR A MOV R3,A AJMP LD0 LD1: RET DB 0c0H,0f9H,0a4H,0b0H,99H,92H,82H,0f8HDB 80H,90H,88H,83H,0c6H,0a1H,86H,8eH DL1: MOV R5,02H DL0: MOV R7,02H DL: MOV R6,0FFH DL6: DJNZ R6,DL6 DJNZ R7,DL DJNZ R5,DL0 RET END 四、實(shí)驗(yàn)步驟: 進(jìn)入Win51組合軟件的操作環(huán)境在Win51組合軟件環(huán)境中, 編輯源程序； 源程序編輯好后,就可對(duì)源文件進(jìn)行編譯,生成目標(biāo)代碼并傳送到開發(fā)系統(tǒng)的RAM中.運(yùn)行、調(diào)試程序和結(jié)果檢查 ⑴ 采用單步，宏單步,執(zhí)行到光標(biāo)處,設(shè)置斷點(diǎn)等方法,觀察程序走向是否正確； ⑵　連續(xù)運(yùn)行程序,依次按動(dòng)數(shù)字鍵觀察LED的顯示是否相符。三、硬件電路：主要芯片：803815754574LS2LED ORG 0000H LJMP CHK0 ORG 000BH LJMP CLOCKCHK0: MOV SP,60H LCALL LCK0 LCALL PTDS0 MOV TMOD,01H ORL IE,82H MOV TL0,0B7H MOV TH0,0CH MOV 23H,00H SETB TR0LOO5: LCALL SSEE LCALL PTDS0 SJMP LOO5PTDS0: MOV R0,79H MOV A,22H ACALL PTDS MOV A,21H ACALL PTDS MOV A,20H ACALL PTDS RETPTDS: MOV R1,A ACALL PTDS1 MOV A,R1 SWAP APTDS1: ANL A,0FH MOV R0,A INC R0 RETCLOCK: MOV TL0,0B7H MOV TH0,3CH PUSH PSW PUSH ACC SETB 0D3H INC 23H MOV A,23H CJNE A,0AH,DONE MOV 23H,00H MOV A,22H INC A DA A MOV 22H,A CJNE A,60H,DONE MOV 22H,00H MOV A,21H INC A DA A MOV 21H,A CJNE A,60H,DONE MOV 21H,00H MOV A,20H INC A DA A MOV 20H,A