已知:(30H)=23H,(31H)=13H,(40H)=72H,(41H)=08H 执行: MOV A,30H ADD A,40H DA A MOV 30H,A MOV A,31H ADDC A,41H DA A MOV 31H,A 则结果为:(30H)=______H,(31H)=______H,(40H)=______H,(CY)=______。
已知:(30H)=23H,(31H)=13H,(40H)=72H,(41H)=08H 执行: MOV A,30H ADD A,40H DA A MOV 30H,A MOV A,31H ADDC A,41H DA A MOV 31H,A 则结果为:(30H)=______H,(31H)=______H,(40H)=______H,(CY)=______。
MOV A,30HMOV A,#30HMOV 31H,R0MOV 31H,@R0
MOV A,30HMOV A,#30HMOV 31H,R0MOV 31H,@R0
XOR P1,#31H
XOR P1,#31H
【程序题】设在 31H单元存有#23H,执行下面程序: MOV A, 31H ANL A, #0FH MOV 41H, A MOV A, 31H ANL A, #0F0H SWAP A MOV 42H, A 则 (41H)= _______, (42H)= _______
【程序题】设在 31H单元存有#23H,执行下面程序: MOV A, 31H ANL A, #0FH MOV 41H, A MOV A, 31H ANL A, #0F0H SWAP A MOV 42H, A 则 (41H)= _______, (42H)= _______
指出下列指令的本质区别。 MOV A,30H MOV A,#30H MOV 31H,R0 MOV 31H,@R0
指出下列指令的本质区别。 MOV A,30H MOV A,#30H MOV 31H,R0 MOV 31H,@R0
有如下程序段:MOV31H,#24H;MOVA,31H;SWAPA;ANLA,#0F0H;执行结果是() A: B: =24H C: D: =42H E: F: =40H G: H: =00H
有如下程序段:MOV31H,#24H;MOVA,31H;SWAPA;ANLA,#0F0H;执行结果是() A: B: =24H C: D: =42H E: F: =40H G: H: =00H
数据段定义如下:BUFF DB 2 DUP(?)执行下面的指令,在键盘输入2个数字:1,2后,BUFF存储单元存储的内容是多少?LEA DI,BUFFMOV CX,2LOP1: MOV AH,1INT 21HMOV [DI],ALINC DI LOOP LOP1 A: 31H,30H B: 30H,31H C: 32H,31H D: 31H,32H
数据段定义如下:BUFF DB 2 DUP(?)执行下面的指令,在键盘输入2个数字:1,2后,BUFF存储单元存储的内容是多少?LEA DI,BUFFMOV CX,2LOP1: MOV AH,1INT 21HMOV [DI],ALINC DI LOOP LOP1 A: 31H,30H B: 30H,31H C: 32H,31H D: 31H,32H
下列程序要完成16位无符号数相加,两数分别存于30H,31H和40H,41H(低位在前),并把和存于30H,31H中(设和无进位输出)。请指出错误,并改正之。 MOV A,30H ADD A,40H MOV 30H,A MOV A,31H ADD A,41H MOV 31H,A 错误:______ 改正:______
下列程序要完成16位无符号数相加,两数分别存于30H,31H和40H,41H(低位在前),并把和存于30H,31H中(设和无进位输出)。请指出错误,并改正之。 MOV A,30H ADD A,40H MOV 30H,A MOV A,31H ADD A,41H MOV 31H,A 错误:______ 改正:______
1已知(R0)=30H,求A,R4,30H,31H的内容MOVA,#10H;MOVR4,#36H;MOV@R0,#7AH;MOV31H,#01H2已知(A)=40H,(40H)=42HMOVR0,A;MOVA,@R0;MOV30H,A;求(30H)=?
1已知(R0)=30H,求A,R4,30H,31H的内容MOVA,#10H;MOVR4,#36H;MOV@R0,#7AH;MOV31H,#01H2已知(A)=40H,(40H)=42HMOVR0,A;MOVA,@R0;MOV30H,A;求(30H)=?
从31H单元开始有一无符号数据块,其长度在30H单元中,求出数据块中最大值,并存入31H单元。编写子程序。
从31H单元开始有一无符号数据块,其长度在30H单元中,求出数据块中最大值,并存入31H单元。编写子程序。