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Mov si offset ary

Nettet11. mar. 2014 · MOV BX,OFFSET TABLE就是把table的偏移地址放进了BX里, 根据ENTRY DW 3的定义,ENTRY就等于3, ADD BX,ENTRY 就是把BX加上3 MOV AX, [BX] 是取出bx的内容放到AX里 而DW表示以字的形式存储,每个字应该占两个字节,也就是说存储顺序为0A 00 14 00 1E 00 28 00 32 00,所以(AX)=1E00 6 评论 分享 举报 … Nettet4. mar. 2024 · 汇编语言直接偏移量操作数 变量名加上一个位移就形成了一个直接 - 偏移量操作数。这样可以访问那些没有显式标记的内存位置。假设现有一个字节数组 arrayB: arrayB BYTE 10h,20h,30h,40h,50h 用该数组作为 MOV 指令的源操作数,则自动传送数组的第一个字节: mov al,arrayB ;AL = 10h 通过在 arrayB 偏移量上加 1 ...

Differences between MOV, LEA and OFFSET - Stack Overflow

Nettetlen dw $ - ary 问len单元存储的值是多少? 7. 有一个程序片段如下 msg dw 3 dup(?, 2 dup (5,4),3) men dw $-msg ┇ ┇ mov ax, seg men mov ds, ax ... mov si,offset source mov di,offset dest mov cx,100 again: movsw dec cx jnz again hlt 2.阅读下面一段程序,写出该程序完成什么功能。 mov ax,1000h NettetEkriirkE • 2 yr. ago. [var] uses the value in memory at the address of the variable offset, OFFSET [var] is the actual address of the variable itself which usually can be implied … holmak https://jasonbaskin.com

微机汇编语言问题 ORG 0200H ARY DW -1,2,-3,4 CNT DW $-ARY VAR DW ARY…

Nettet10. jun. 2016 · mov esi, OFFSET byteVal. Here the address of byteVal will be put into register esi (assume 00404000 as in the example) mov al, [esi] ; AL = 10h. Here the esi … NettetConsider following data declaration and fill memory and update SI after execution of every instruction? Address starts at 0 × 0100 ary word 1, 2, 3 mov SI, OFESET ary mov ax, … Nettet4. mar. 2024 · 设X、Y、Z、W均为双字长数据,各自的低十六位数和高十六位数分别存放在X、X+2、Y、Y+2、Z、Z+2的存储单元中,结果的低十六位字和高十六位字分别存放 … holmaks

计算机组成原理与汇编语言程序设计复习题_百度题库

Category:汇编指令LEA - 简书

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Mov si offset ary

Differences between MOV, LEA and OFFSET - Stack Overflow

Nettet3. jan. 2012 · So, mov ax, [si] is equivalent to mov ax, [ds:si] which (with your register values) represents mov ax, [3000:200]. Internally, the processor will calculate the absolute memory address of (3000*16)+200 and copy the data from that memory location into ax. A similar procedure is used for the memory accesses when adding and saving the result. Nettetmov al,VARIABLENAME storage db 0, "$" mov [storage],al mov ah,9 mov dx,storage int 21h. That uses DOS vector 21h ("$" = string terminator), replace VARIABLENAME with …

Mov si offset ary

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Nettet12. des. 2014 · DATA ENDS CODE SEGMENT ASSUME DS:DATA, CS:CODE START: MOV AX,DATA MOV DS,AX MOV SI,OFFSET ARY ;取ARY的偏移地址 MOV AL, [SI] ;取16进制数至AL MOVBL,AL AL,0F0H;取16进制数的高四位,即X SHRAL,4 MOV [SI+1],AL ;存0X MOVAL,BL AL,0FH;取16进制数的低四位,即X MOV [SI+2],AL ;存0X … Nettet微机原理--8种寻址方式 指令和指令系统指令:控制计算机完成某种操作的命令 指令系统:处理器能识别的所有指令的集合 指令的兼容性:同一系列机的指令是兼容的 指令的包含的内容: 运算数据的来源运算结果的去向执…

Nettet汇编语言机考填空题库汇总. 其他 2024-07-20 14:04:56 阅读次数: 0. 程序段填空题. 1.下述程序段执行后,AX= () CF=( D )。. mov ax,0bc5fh 1011 1100 0101 1111. mov bx,0cfbh 0000 1100 1111 1011. xor ax,bx 1011 0000 1010 0100. or ax,bx 1011 1100 1111 1111 0BDFF. 选项A )BC5FH;0 选项B)BCFFH;1. Nettet1111 通信《微机原理与接口技术》作业.doc. *教材:中国科大《微型计算机原理与接口技术》第 5 版 *思考题:不用写在作业本,不用上交作业; *书面题:. z z z z 写在作业本上,周一上课前上交作业; 作业本必须有封面,写清课程名、班级、学号、姓名; 作业题 ...

Nettet17. jun. 2024 · SPECIAL_BYTE equ 0xff mov si , CompressedData mov di , CompressedBegin mov cx , COMPRESSED_SIZE .decompress: lodsb stosb cmp al , SPECIAL_BYTE jnz short .not_special dec di mov ax , 0xffad ; lodsw / jmp ax stosw mov al , 0xe0 stosb call MakeLink .not_special: loop .decompress Nettet10. mai 2024 · LEA SI,STR与MOV SI,OFFSET STR最大区别在于OFFSET STR是一条伪指令,与SEG DATA之类相似,它在编译和连接过程被赋给一个值,你可以把它看成一个 …

Nettet第一个问题我觉得AX应该等于0FFFFH吧正好-1,mov ax, ary这里的ARY应该是偏移地址里的值,下面一行里不是有个OFFSET伪指令吗。 第二个问题MOV DX, VAR+2 VAR+2里的值是$ + 4 ,老师说得没错。 VAR DW ARY, $ + 4 VAR = 020AH 第一个变量的偏移 VAR + 2 = 020CH 第二个的偏移 $ + 4 = 020Ch + 4 要是会用DEBUG 就一目了然了! 5 评论 …

holmalahtiNettet自-计算机组成原理与汇编语言程序设计课后习题及解答(详解).pdf holman 10t45Nettet14. sep. 2016 · 1. I am rather confused by the concept OFFSET Operator. According to Kip R. Irvine's book Assembly Language for x86 Processors, he defines the Offset Operator as the operator that returns the distance of a variable from the beginning of its enclosing segment. He also says the Offset Operator returns the offset of a data label and that ... holman 08054Nettet29. nov. 2011 · LEA SI,STR与MOV SI,OFFSET STR最大区别在于OFFSET STR是一条伪指令,与SEG DATA之类相似,它在编译和连接过程被赋给一个值,你可以把它看成一个立即数,LEA SI,STR是把STR的内存指针赋给SI,你可以把它看成内存变量。 另外,MOV SI,OFFSET STR是一条2字节立即寻址指令,LEA SI,STR是一条3字节内存寻址指令, … holman 1605Nettet21. feb. 2024 · mov si, offset ary ;si指向ary的第一个元素 mov cx, 9 ;cx作循环次数计数 mov al, [si] ;取第一个元素到al lop: inc si ;si指向后一个元素 cmp al, [si] ;比较两个数 jae … holma maskinNettet计算机组成原理与汇编语言程序设计复习题_试卷 holman 100mm pvc pipeNettetmov al, cs:[si] ; uses SI as an offset into the CS mov bx, fs:[edx] ; uses EDX as an offset into the FS mov dx, ds:[bp] ; uses BP as an offset into the DS, ; instead of the SS. … holma malmö