《单片机》读程序题题库答案.docx

《《单片机》读程序题题库答案.docx》由会员分享，可在线阅读，更多相关《《单片机》读程序题题库答案.docx（58页珍藏版）》请在课桌文档上搜索。

1、四、阅读下列程序，注释并填写指令执行后的结果(母题10分)1、ORG1.JMP0START;跳转到(PC)=003OH处ORQ30HSTART:MOVR0,#20H;#20H-R0(RO)=20HMOVR1y#30H：#30H-R1(R1)=30HMOVAyRO;(RO)-A（八）=20HADDAy#36H;（八）4#36H-A（八）=56HMOVP1,A;()-P1(P1)=56HINCRO;(R0)+1-R0(RO)=21HINCR1;(R1)+1-R0(R1)=31HANLA,R1;（八）4(RD-A（八）=10HSWAPA;累加器A的凹凸4位交换（八）=01HPUSHACC;累加器A内

2、容压栈MOVP1,A;（八）-P1(P1)=01HPOPB;堆栈内容出栈到B寄存器(B)=OIHMOVRO,A;（八）-RO(RO)=OIHMOVDPTRt#2200H;#2200H-DPTR(DPTR)=2200HSETBC;1-Cy(Cy)=IADDCA,#0;（八）+0+(Cy)-A（八）=02HMOVXWPTR,A;（八）-XDPTR)(2200H)=02HEND(RO)=01H(RD=31H(PD=OIH(B)=_01H(2200H)=一02H2、ORG0LJMPSTART;跳转到(PC)=Oo30H处ORG3OHSTART:MOVSP,#50H;#50H-SP(SP)=50HMOV

3、R2t*10H;#10H-R2(R2)=10HMOVDPTR,#300OH;#3000H-DPTR(DPTR)=3000HCRLA;0-A（八）=OLOOP:MOVXWPTR1A;（八）-XDPTR)INCDPTR:(DPTR)+1-DPTRDJNZR2,L00P:(R2)-1-R2若(R2)不等于零则转移到LoOP处INCDPH;(DPH)+1-M)PH(DPH)=31H(R2)=00H(DPL)=IOHINCDPH：(DPH)+1-DPH(DPH)=32HMOV20H,#36H;#36H-(20H)(20H)=36HSETBOOH;位地址OOH置120H.0=1(20H)=37HMOVA,

4、20H:(20H)-A（八）=37HMOVXDPTR,A;（八）-XDPTR)(DPTR)=321OH(3210H)=37HINCA;（八）+1-A（八）=38HINCA;（八）+1-A（八）=39HPUSHACC：系加器A内容压栈(SP)=51HXCHA,R2;累加器A的内容与R2内容互换（八）=OOH(R2)=39HPOPDPH;堆栈内容弹到DpH(DPH)=39HADDAt#55H;（八）#55H-A（八）=55HPUSHACC;累加器A内容压栈END（八）=55H(R2)=39H(20H)=37H(DPTR)=391OH(SP)=51H3、ORG1.JMIORG0START3OH;跳杆

5、到(PC)=OO30H处START:MOVRO,#30H;#30H-R0(RO)=30HMOVAt*12H;#12H-A（八）=12HSETBC：(Cy)=1ADDCAtRO;（八）+(RO)+Cy-A（八）=43HMOV能0,A：（八）-XRO)(30H)=43HSWAPA;索加再A凹凸4位交换（八）=34HINCA;（八）+1-A（八）=35HMOVDPTR1#2000H:#2000H-DPTR(DPTR)=2000HINCDPH;(DPH)+1-DPH(DPH)=21HMOVP1,A;（八）-P1(P1)=35HINCA;()+1-A（八）=36HMOVXOPTR,A;（八）-XDPTR

6、)(2100H)=36HXCHAyRO;（八）SRO（八）=30H(RO)=36HRLA;尿加器A内容循环左移()=60HPUSHACC;累加舞A的内容入栈RLA;累加器A内容状环左移（八）=OCOHPOPACC：堆栈内容弹出到索加器A（八）=60HEND（八）=60H(RO)=36H一(DPTR)=2100H(PD=35H(30H)=43H4、ORGOLJMPSTART;跳好到(PC)=Oo30H处ORG30HSTART:MOVSP,#50H;#50H-SP(SP)=50HMOVDPTR,#300OH;#3000H-DPTR(DPTR)=3000HMOVR0#20H;#20H-R0(RO)=

7、20HMOVA#23H:#23H-A（八）=23HMOVR2,#0FH;#0FH-R2(R2)=0FHSETB01H;量位20H.1(20H.1)=1SETBC：量住Cy(Cy)=IADDCA,0RO;（八）+(RO)H)y-A（八）=26HINCRO;(R0)+1-R0(RO)=21HMOVRO,A：（八）-X(RO)(21H)=26HLOOP:DJNZR2,LOOP;(R2)-1-R2若R2内容不等于草则样移SWAPA;累加卷A内容的凹凸4位交换（八）=62HPUSHACC;累加器A内容入栈INCDPH;(DPH)+1-DPH(DPH)=31HMOVXO)PTR,A：（八）-XDPTR)(

8、31OOH)=62HPOPB：堆栈内容弹出到B(B)=62HRRA;累加再A内容筑环右移（八）=31HADDA,B：（八）+(B)A（八）=93HMOVP1,A：（八）-P1(P1)=93HEND(21H)=26H(R2)=OOH（八）=93H(B)=62H(3100H)=62H5、ORGOLJMPSTART.;跳榜到(PC)=0030H处ORG30HSTART:MOVDPTR,#1OOOH;#1000H-DPTR(DPTR)=1000HMOVA#13H;#13H-A（八）=13HMOVR0t#20H:#20H-R0(RO)=20HSETBC;1-Cy(Cy)=1MOVROlA;（八）-X(R

9、O)(20H)=13HRLCA;累加器A的内容带进位相环左移（八）=27HXCHA,gO;乐加国A的内容与20H单元的内容互换（八）=13H(20H)=27HPUSHACC;累加器A的内容入栈POPDPL;堆栈内容弹出到DpL(DPL)=13HMOVXWPTR,A;（八）-XDPTR)(1013H)=13HDECA;（八）-1-A（八）=12HPUSHDPH:DPH内容压栈POPB;堆栈内容弹出到B(B)=IoHADDA,B;（八）+(B)-A（八）=22HMOVP1,A.：（八）-P1(P1)=22HCLRA;累加BA内容清聿ADDA,B;（八）+(B)-A（八）=IOHEND(PD=22H

10、(B)=10H(20H)三27H(DPTR)=1013H(RO)=20H6、ORGOLJMPSTART;跳榜到(PC)=003OH处ORG30HSTART:MOVSPr*50H;#50H-SP(SP)=50HMOVRO,#20H;#20H-R0(RO)=20HMOVR2,#10H;#10H-R2(R2)=10HMOVAt#24H；#24H-A（八）=24LOOP:MOV0RO,A;（八）-X(RO)INCRO;(R0)+1-R0DJNZR2,LOOP;(R2)-1-R2若R2内容不等于。则跳转到LoOP处SETBOOH;1一位地址为OOH的位(20H.0)=1(20H)=25HSETBC;1-

11、Cy(Cy)=1ADDCA,#00H;（八）-KX)H+(Cy)-A（八）=25HSWAPA;累加器A内容凹凸四位互换（八）=52HPUSHACC:累加器A内容压栈POPDPH:堆栈内容弹出到DPH(DPH)=52HPUSHACC;累加居A内容压栈POPB；堆栈内容律出到B(B)=52HMOVA,R2;(R2)-A（八）=OOHMOVDPL,A;（八）-DPL(DPL)=OOHMOVAyB;(B)-A（八）=52HPUSHACC：累加器A内容压栈(SP)=SlHEND（八）=52H(R2)=OOH(20H)=25H(DPTR)=520OH(SP)=51H7、ORGOLJMPSTART;跳料到(

12、PC)=003OH处ORG30HSTART:MOVDPTR,#21OOH;#21OOH-DPTR(DPTR)=21OOHCLRA;0-A（八）=OOHMOVR1,#30H：#30H-R1(R1)=30HSETBC;1Cy(Cy)=IADDCAyRl;（八）+(R1)-HJy-A（八）=31HMOV能1,A;（八）-X(RD)(30H)=31HPUSHACC;累加看A的内容压栈POPDPL;堆栈内容弹出到DPL(DPL)=31HRRA;尿加器A的内容错环右移（八）=98HMOVRO,A;（八）-RO(RO)=98HORL儿#24H：（八）or24H-A（八）=OBCHMOVP1,A:（八）-P1

13、(PI)=OBCHSWAPA;累加再A的内容凹凸四位交换（八）=OCBHMOVDPH,A;（八）-DPH(DPH)=OCBHMOVB,#02H:#02H-B(B)=02HADDA,B;（八）+(B)-A（八）=OCOHCLRACC.3;O-ACC.3（八）=0C5HSWAPA;累加器A的内容凹凸四位交换（八）=SCH8、ORGOLJMPSTART;跳臂到(PC)=Oo30H处ORG30HSTART:MOVSP,#50H;#50H-SP(SP)=50HMOVR3f*10H;#10H-R3(R3)=10HCLRA：累加暮A内容清聿（八）=OOHMOVR0t#20H;#20H-R0(RO)=20HL

14、OOP:MOVRO,A：（八）-X(RO)(20H)=00HINCRO;(R0)+1-R0(20H)=01HDJNZR3,L00P;(R3)-1-R3若R3不等于掌则跳转到L(X)P处SETBOOH;1一位地址OOH位(20H0)=1(20H)=01HSETBC：1-Cy(Cy)=ISUB8A,#OoH;（八）-A（八）=OfTHMOVDPL,A：（八）DPL(DPL)=OFFHPUSHACC：累加器A的内容压栈MOVAtR3;(R3)-A（八）=OOHMOVDPH,A;（八）-DPH(DPH)=OOHPOPACC：堆栈内容弄出到A（八）=OFFHMOVXO)PTR,A;（八）-(DPTR)(

15、OOFFH)=OFFHANLA,#55H;（八）and55H-A（八）=55HPUSHACC;累加器A的内容压栈(SP)=SIHCLRA;累加舞A内容清*（八）=OOHENDEND(A)= 5CH (RO)= 98H(DPTR)= 0C831H(PD= OBCH (30H)= 31HOO=OOH(R3)=OOH(20H)=OIH(DPTR)=OOFFH(SP)=51H9、ORGOLJMPSTART;跳杼到(PC)=003OH处ORG30HSTART:MOVRO,#30H;#30H-R0(RO)=30HMOVR1,#20H;#20H-R1(R1)=20HMOVA,RO;(RO)-A（八）=30H

16、ADOA,#37H;（八）4*36H-A（八）=67HMOVIM,A;（八）-P1(P1)=67HINCRO;(R0)+1-R0(RO)=31HINCR1;(R1)+1-R0(R1)=21HANLA,R1;（八）&(RI)-A（八）=21HSWAPA;累加器A的凹凸4位交换（八）=12HPUSHACC;又加器A内容压栈MOVP1,A;（八）P1(P1)=12HSWAPA;系加需A的凹凸4位交挨（八）=21HPOPB;堆栈内容出栈到B寄存器(B)=12HMOVROyA;（八）-RO(RO)=21HMOVDPTR,#2200H;#2200H-DPTR(DPTR)=2200HSETBC;1-Cy(C

17、y)=1ADDCA,B;（八）+(B)+(Cy)A()=34HMOVXWPTR1A;（八）-XDPTR)(2200H)=34HEND(RO)=21H(RD=21H(PI)=12H(B)=12H(2200H)=34H10、ORGOLJMFSTART;跳杼到(PC)=OO30H处ORG30HSTART:MOVSP,#50H;#50H-SP(SP)=50HMOVR2,#20H;#20H-R2(R2)=20HMOVDPTR,#300OH;#3000H-DPTR(DPTR)=30HCLRA;0-A（八）=OLOOP:MOVXOPTR,A;（八）-XDPTR)INCDPTR：(DPTR)+1-DPTRDJ

18、NiIR2,L00P;(R2)T-R2若(R2)不等于搴则样移到L(X)P处INCDPH;(DPH)+1-DPH(DPH)=31H(R2)=00H(DPL)=20HINCDPH;(DPH)+1-DPH(DPH)=32HMOV20H,#38H;#36H-(20H)(20H)=38HSETEI01H;位地址OlH量120H.1=1(20H)=3AHMOVA,20H：(20H)-A（八）=3AHMOV)(OPTR,A;（八）-XDPTR)(DPTR)=3220H(3220H)=3AHINCA;（八）+1A（八）=3BHINCA;（八）+1-A（八）=3CHPUSIIACC:累加器A内容压栈XCHPO

19、PADDPUSFENDOO=55HA,R2DPHA,#55HIACC(R2)=3CH;累加患A的内容与R2内容互换;堆栈内容弄到DPH(DPH)=3CH;（八）+#55H-A（八）=55H;累加器A内容压栈，(SP)=51H(20H)=3AH(DPTR)=3C20H（八）=OOH(R2)=3CH(SP)=51H11、ORGOLJMPSTART；跳转到(PC)=Oo30H处ORG30HSTART:MOVR0,#20H;#20H-R0(RO)=20HMOVAt#31H：#31H-A（八）=31HSETBC;(Cy)=IADDCA,RO;（八）+(RO)+CyA（八）=52HMOV能O,A;（八）(

20、RO)(20H)=52HSWAPA;从加叁A凹凸4位交换（八）=25HDECA;（八）-I-A（八）=24HMOVDPTR,#200OH;#2000H-DPTR(DPTR)=2000HINCDPH;(DPH)+1-DPH(DPH)=21HDECDPL;(DPL)-1-DPL(DPL)=OFFHMOVP1,A：()P1(P1)=24HINCA;（八）+1-A（八）=25HMOVXOPTR,A;（八）-(DPTR)(21FFH)=25HXCHA,RO：（八）SRO（八）=20H(RO)=25HRLA;索加叁A内容口环左移（八）=40HPUSHACC;系痴器A的内容入栈RLA;累加器A内容优环左移（

21、八）=80HPOPACC；堆栈内容弹出到索加叁A（八）=40HEND（八）=40H(RO)=25H(DpTR)=21FFH(PD=24H(20H)=52H12、ORGOLJMFSTART;跳杆到(PC)=Oo30H处ORG30HSTART:MOVSP,#50H;#50H-SP(SP)=50HMOVDPTR,#200OH;#3000H-DPTR(DPTR)=2000HMOV20H,#06H;#06H-20H(20H)=06HMOVR0,#20H;#20H-R0(RO)=20HMOVA,#35H:#35H-A（八）=35HMOVR2t#10H;#10H-R2(R2)=10HSETBOOH:五位20

22、H.0(20H.0)=1(20H)=07HSETBC:五位Cy(Cy)=1ADDCA,0RO;（八）+(RO)-H)y-A（八）=3DHINCRO;(R0)+1-R0(RO)=21HMOV0RO,A：（八）-X(RO)(21H)=3DHLP:DJNZR2,LOOP;(R2)-1-R2若R2内容不等于本则转移SWAPA:累加器A内容的凹凸4位交换（八）=0D3HPUSHACC;累加器A内容入栈INCDPH;(DPH)+1-DPH(DPH)=21HMOVXQPTR,A;（八）-XDPTR)(21OOH)=0D3HPOPB;堆栈内容弹出到B(B)=OMHRRA;累加舞A内容拥环右移（八）=0E9HA

23、DDA,B;（八）+(B)A（八）=OBCHMOVP1,A：（八）-P1(PD=OBCHEND(21H)=3DH(R2)=OOH（八）=OBCH(B)=003H(2100H)=0D3H13、ORGOLJMPSTART;跳转到(PC)=30H处ORG30HSTART:MOVDPTR,#200OH;#2000H-DPTR(DPTR)=2000HMOV#36H：#36H-A（八）=36HMOVR0,t30H:#30H-R0(RO)=30HSETBC;1Cy(Cy)=1MOV0RO,A;（八）-X(RO)(30H)=36HRLCA：累加器A的内容带进位据环左移（八）=6DHXCHA,RO;累加BA的内

24、容与20H单元的内容互换（八）=36H(30H)=6DHPUSHACC;累加若A的内容入栈POPDPL：堆栈内容弹出到DpL(DPL)=36HMOVXWPTR,A;（八）-XDPTR)(2036H)=36HDECA;（八）-1-A（八）=35HPUSHDPH:DPH内容压栈POPB;堆栈内容弹出到B(B)=20HADD儿B:（八）+(B)-A（八）=55HMOVP1,A;（八）-P1(P1)=55HCLRA：累加国A内容清*ADDAyB:（八）+(B)-A（八）=20HEND(PD=55H(B)=20H(30H)=6DH(DPTR)=2036H(RO)=30H14、ORGOLJMPSTART;

25、跳转到(PC)=003OH处ORG30HSTART:MOVSP,#60H;#60H-SP(SP)=60HMOVRO,#20H;#20H-R0(RO)=20HMOVR2,#10H：#10H-R2(R2)=10HMOVA,#24H;#24H-A（八）=24HLOOP:MOV能O,A;()(RO)INCRO;(R0)+1-R0DJNZR2,LOOP;(R2)-1-R2若R2内容不等于。则跳转到LooP处SETB01H：1一位地址为OIH的位(20Hj)=I(20H)=26HSETBC;1-Cy(Cy)=IADDCAv20H;（八）+(20H)+(Cy)-A（八）=48HSWAPA;累加患A内容凹凸四

26、位互换（八）=0B4HPUSHACC;系施器A内容压栈POPDPH;堆栈内容弹出到DPH(DPH)=0B4HPUSHACC；累加器A内容压栈POPB;堆栈内容弹出到B(B)=0B4HMOVA,R2;(R2)-A（八）=OOHMOVDPL,A：（八）-DPL(DPL)=OOHADDA,B;（八）+(B)-A（八）=0B4HPUSHACC;累加器A内容压栈(SP)=61HEND（八）=_0B4H(RO)=30H(20H)=26H(DPTR)=0B400H(SP)=61H15、ORGOLJMPSTART;跳转到(PC)=003OH处ORG30HSTART:MOVDPTR,#11OOH;#11H-DP

27、TR(DPTR)=11OOHCLRA:0-A（八）=OOHMOVR1t*20H;#20H-R1(R1)=20HSETBC;1Cy(Cy)=1ADDCAyRl;（八）+(R1)+Cy-A（八）=21HMOVR1,A;（八）-X(RD)(20H)=21HINCA;（八）+1-A（八）=22HINCA:（八）+1-A（八）=23HPUSHACC;素加器A的内容压栈POPDPL;堆栈内容弹出到DPL(DPL)=23HRRA;累加器A的内容摘环右移（八）=91HMOVRO,A;（八）-RO(R0)=91HORLAt#24H;（八）or#24H-A（八）=0B5HMOVP1,A:（八）-P1(P1)=0B

28、5HSWAPA;索加器A的内容凹凸四位交换（八）WBHMOVDPH,A;（八）-DPH(DPH)=SBHMOVB,#02H;#02H-B(B)=02HADOA,B：（八）+(B)-A（八）=5DHCLRACC.4;O-ACC.4（八）=4DHSWAPA;累加器A的内容凹凸四位交换（八）=OMHEND（八）=D4H(RO)=91H(DPTR)=5B23H(P1)三05H(20H)21H16、ORG1.JMPOSTART;跳转到(PC)=003OH处ORGSTART:MOV30HSP,#60H;#60H-SP(SP)=60HMOVR3,#20H;#20H-R3(R3)=20HMOVA,#20H：#

29、20H-A（八）=20HMOVRO,MOH;#20H-R0(RO)=20HLOOP:MOVORO,A;（八）-X(RO)INCRO：(R0)+1-R0DJNZR3,L00P;(R3)-1-R3若R3不等于聿则跳转到LOOP处SETB02H：1一位地址02Hji(20H2)=1(20H)=24HSETBC：1-Cy(Cy)=ISUBBA,20H;（八）-(20H)-Cy-A（八）=OFBHMOVDPL,A;（八）-DPL(DPL)=OFBHPUSHACC;累加器A的内容压栈MOVA,R3;(R3)-A（八）=OOHMOVDPH,A;（八）-DPH(DPH)=OOHPOPACC:堆栈内容弹出到A（

30、八）=OFBHMOVXQPTR,A;（八）-(DPTR)(OOFBH)=OFBHANLAt#55H;（八）and55H-A（八）=51HPUSHACC;累加器A的内容压栈(SP)=61HSWAPA;累加叁A内容凹凸4位交摸（八）=15HEND（八）=_15H(R3)=OoH(20H)=24H(DPTR)=OOFBH(SP)=61H17、ORGOMOVR2,#8;#8-R2(R2)=8HMOVR0,#30H;#30H-R0(RO)=30HCLRA;#0-A（八）=OCPLA;素加器A的内容取反，（八）=OFFHLP:MOVMO,A;（八）-(RO)(30H)(37H)=OFFHINCRO;(R0

31、)+1-R0DJNZR2,LOOP;(R2)-1-R2,(R2)0则转移到LOoP处MOVB,R2;(R2)-B(B)=(R2)=0INCB;(B)+1-B(B)=IMOVA,RO;(RO)-A（八）=(R0)=38HCLRC;O-CyCy=OADDCA,B;（八）+(B)+Cy-A（八）=39HMOVRO,A;（八）-R0(RO)=（八）=39HRLCA;尿加舞A的内容带进位左移，（八）=72HMOVDPTR,#1234H;#1234H-DPTR(DPTR)=1234HMOVXWPTRrA（八）-XDPTR)(1234H)=72HSWAPA；累加居A的内容凹凸4位交换，（八）=27HPUSH

32、ACC;累加器内容入栈POPDPH;堆栈内容弹出到DpH(DPH)=27HEND(RO)=39H（八）=27H(33H)=OFFH(DPTR)=2734H(1234H)=72H评分方法：指令注释占5分，对于程序段注释部分写对的学生可酌情给1一4分；程序段执行年果今空1分，共5分.18、ORG0MOVSP,#60H;#60H-SP(SP)=60HMOVDPTR,#1OOOH;#1000H-DPTR(DPTR)=I000HMOVR0,#4OH;#40H-R0(RO)=40HMOVA,#40H;#40H-A（八）=40HMOVR2,超;#8-R2(R2)=08HLOOP:MOV0R0,A;（八）-(

33、R0)(40H)(47H)=40HINCRO;(RO)+1-R0DJNZR2,LP;(R2)-1-R2,(R2)0则转移到L(X)P处MOVR0,#40H;#40H-R0(RO)=40HMOVR2,#8;#8-R2(R2)=08HL00P1：MOVA,0RO;(RO)-AINCA;（八）+1-AANLA,#0FH;（八）and#OFH-AMOVX0DPTR,A;（八）-XDPTR)(1000H)*(1007H)=01HINCRO;(RO)+1-R0INCDPTR;(DPTR)+1-DPTRDJNZR2,L00P1;.(R2)-1-R2,(R2)手0；则料移到LooPl处PUSHDPL;DPL内

34、容入栈(SP)=61HPOPB;堆栈内容弹出到B寄存器，(B)=08H,(SP)=60HPUSHDPH;DPH内容压栈(SP)=61HPOPACC;堆栈内容弹出到累加基A,（八）=10Ht(SP)=60HADDA,B;（八）+(B)-A（八）=18HPUSHENDB;寄存器B内容压栈(SP)=61H（八）=18H(B)=08H(42H)=_40H(1004H)=01H(SP)=61H评分方法：指令注释占5分，对于程序及注释部分写对的学生可酌情给14分；程序段执行结果冬空1分，共5分.19、ORG0MOVR0,#20H#20H-R0(RO)=20HMOVA,#40H#40H-A（八）=40HSE

35、TBC;1-XyCy=1ADDCAtRO;（八）+(RO)+Cy-A（八）=61HMOVR2,#8;#8-R2(R2)=08HLOOP:MOV0R0,A;（八）-XRO)(20H)(27H)=61HINCRO;(R0)+1-R0DJNZR2,LOOP;(R2)-1-R2(R2)手。则跳杆到LooP处MOVP1,R2;(R2)-P1(P1)=0CLR00H;0-20H.0(20H)=60HMOVA,20H;(20H)-A（八）=60HPUSHACC;累加器A的内容入栈POPDPH;弹栈到DpH(DPH)=60HMOVA,25H;(25H)-A（八）=61HMOVENDDPLtA;（八）-DPL(

36、DPL)=61H(20H)=60H(22H)=61H(DPTR)=606IH(Pl)=OoH(RO)=28H评分方法：指令注择占5分，对于程序段注择部分写对的学生可酌情给1一4分；程序段执行结果每空1分，共5分.20、ORG0MOVSP,#50H;#50H-SP(SP)=50HMOVRO,MOH;#20H-R0(RO)=20HMOVBtRO;(RO)-B(B)=20HMOVA,#30H;#30H-A（八）=30HADDA,B；（八）+(B)-A（八）=50HSETBC；1-CyCy=1RRCA；系加禽A的内容带进位相环右移（八）=0A8HCy=OMOV能0,A;（八）-XRO)(20H)=0A

37、8HSETBOOH;1-20H.0(20H)=OA9HMOVDPTR,#1000H;#1000H-DPTR(Dptr)=100OHMOVX索)PTR,A;（八）-XDPTR)(1000H)=0A8HINCDPL;(DPL)+1-DPL(DPL)=OIH(DPTR)=11HMOVA,RO;(RO)-A（八）=OA9HMOVXWPTRfA;（八）-XDPTR)(1001H)=0A9HSWAPA;累加居A的内容进行凹凸四位支换（八）=9AHORLA,#OFH（八）or#OFH-A（八）=9FHPUSHACC;累加器A的内容入栈(SP)=51HPOPDPL;弹栈到DPL(DPL)=9FH(DPTR)=109FH(SP)=50HPUSHACC;系