四、阅读下列程序，注释并填写指令执行后旳成果（每题 10 分）1、 ORG 0 LJMP START ；跳转到（PC）＝0030H 处 ORG 30HSTART：MOV R0,#20H ；＃20H－>R0 (R0)=20H MOV R1,#30H ； #30H－>R1 (R1)=30H MOV A,R0 ；(R0)－>A (A)=20H ADD A,#36H ；(A)+#36H－>A (A)=56H MOV P1,A ；(A)－>P1 (P1)=56H INC R0 ；(R0)+1－>R0 (R0)=21H INC R1 ；(R1)+1－>R0 (R1)=31H ANL A,R1 ；(A)&(R1)－>A (A)=10H SWAP A ；累加器 A 旳高下 4 位互换 (A)=01H PUSH ACC ；累加器 A 内容压栈 MOV P1,A ；(A)－>P1 (P1)=01H POP B ；堆栈内容出栈到 B 寄存器 (B)=01H MOV R0,A ；(A)－>R0 (R0)=01H MOV DPTR，＃2200H ；#2200H－>DPTR (DPTR)=2200H SETB C ；1－>Cy (Cy)=1 ADDC A,＃0 ；(A)+0+(Cy)－>A (A)=02H MOVX @DPTR,A ；(A)－>(DPTR) (2200H)=02H END(R0)= 01H (R1)= 31H (P1)= 01H (B)= 01H (2200H)= 02H 2、 ORG 0 LJMP START ；跳转到(PC)=0030H 处 ORG 30H START：MOV SP,#50H ；#50H－>SP (SP)=50HMOV R2,#10H ；#10H－>R2 (R2)=10H MOV DPTR,#3000H ；#3000H－>DPTR (DPTR)=3000H CRL A ；0－>A (A)=0 LOOP： MOVX @DPTR,A ；(A)－>(DPTR) INC DPTR ；(DPTR)+1－>DPTR DJNZ R2,LOOP ；(R2)-1－>R2 若(R2)不等于零则转移到 LOOP 处 INC DPH ；(DPH)+1－>DPH (DPH)=31H (R2)=00H (DPL)=10H INC DPH ；(DPH)+1－>DPH (DPH)=32H MOV 20H,#36H ；#36H－>(20H) (20H)=36H SETB 00H ；位地址 00H 置 1 20H.0=1 (20H)=37H MOV A,20H ；(20H)－>A (A)=37H MOVX @DPTR,A ；(A)－>(DPTR) (DPTR)=3210H (3210H)=37H INC A ；(A)+1－>A (A)=38H INC A ；(A)+1－>A (A)=39H PUSH ACC ；累加器 A 内容压栈 (SP)=51H XCH A,R2 ；累加器 A 旳内容与 R2 内容互换 (A)=00H (R2)=39H POP DPH ；堆栈内容弹到 DPH (DPH)=39H ADD A,#55H ；(A)+#55H－>A (A)=55H PUSH ACC ；累加器 A 内容压栈 END(A)= 55H (R2)= 39H (20H)= 37H (DPTR)= 3910H (SP)= 51H 3、 ORG 0 LJMP START ；跳转到(PC)=0030H 处 ORG 30HSTART：MOV R0,#30H ；#30H－>R0 (R0)=30H MOV A,#12H ；#12H－>A (A)=12H SETB C ；(Cy)=1 ADDC A,R0 ；(A)+(R0)+Cy...
