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Ax bx cx dx能用来存放偏移地址吗 哪些可以 哪些不可以

WebDec 9, 2024 · ax、bx、cx、dx 这四个寄存器一般用来存放数据，也被称为 数据寄存器。 它们的结构如下 8086 CPU 的上一代寄存器是 8080 ，它是一类 8 位的 CPU，为了保证兼容性，8086 在 8080 上做了很小的修改，8086 中的通用寄存器 AX、BX、CX、DX 都可以独立使用两个 8 位寄存器来 ... WebThe registers AX, BX, CX, and DX behave as general purpose registers in Intel architecture and do some specific functions in addition to it. X in their names stand for extended meaning 16bit registers. For example AX means we are referring to the extended 16bit “A” register. Its upper and lower byte are separately accessible as AH (A high ...

汇编之偏移地址几种常用写法 - 码农的笔记 - 博客园

Web对于8位操作数，寄存器可以是AL,AH,BL,BH,CL,CH,DL,DH。 对于16位操作数，寄存器可以是AX,BX,CX,DX,BP,SP,SI,DI等 eg. mov ah,ch mov bx,ax 3 直接寻址方式 操作数在存 … WebComputer Science questions and answers. 1- Develop a short sequence of instructions that add AX, BX, CX, DX, and SP. Save the sum in the DI register. 2- What do the following MOV AL, [BP+SI-200H]. instructions accomplish? 3- Select a SUB instruction that will subtract the data stored 10 words after the location addressed by SI from DX. mc363dnw イメージドラムユニット https://benwsteele.com

AX,BX,CX,DX 寄存器_gaokewoo的博客-CSDN博客

WebOct 20, 2024 · 我们看下指令mov ax, [bx+si]的含义：. 将一个内存单元的内容送入ax，这个内存单元的长度为2字节（字单元），存放一个字，偏移地址为bx中的数值加上si中的数 … WebNote that no addressing mode involving cx exists, so [cx] is not a valid memory operand.. The registers ax, cx, dx, bx, sp, bp, si, and di are called general purpose registers because they are accessible as operands in all general-purpose instructions. This is in contrast to special-purpose registers like es, cs, ss, ds (segment registers), ip (the … WebAug 28, 2016 · 8086汇编学习笔记（一） 8086汇编常用的十六位寄存器：ax，bx，cx，dx，cs，ds，es，ss，bp，ip，sp，di，si。其中ax，bx，cx，dx，bp，ip，sp，di，si为通用寄存器 而cs，ds，es，ss称作段寄存器 注：通用寄存器可以装入立即数，但段寄存器不能直接装入立即数。如果想要向段寄存器中装 … agenzia delle dogane e dei monopoli livorno

寄存器缩写Ax BX CD DX ..._Tony.S的博客-CSDN博客

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Ax bx cx dx能用来存放偏移地址吗 哪些可以 哪些不可以

[Day04] 通用暫存器 - iT 邦幫忙::一起幫忙解決難題，拯救 IT 人的 …

WebFeb 2, 2024 · mov ax, bx mov ax, [bx] If bx contains the value 100h and the value at memory address 100h is 23, does the second one copy 23 to ax? Also, what is the difference between the two following lines? mov ax, 102h ; moves value of 102h into register ax mov ax, [102h] ; Actual address is DS:0 + 102h. assembly. WebNov 25, 2009 · 一、ax,bx,cx,dx寄存器作用 寄存器ax、bx、cx、dx是8086cpu中的四个通用寄存器，主要用来存放一般性的数据。 二、 AX , BX ,CX, DX 寄存器 的结构 因 …

Ax bx cx dx能用来存放偏移地址吗 哪些可以 哪些不可以

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WebMOV AX, BX AX := BX (2 ops) ADD DX, CX DX := DX + CX (2 ops) SUB DX, AX DX := DX – AX (2 ops) INC AX AX := AX + 1 (1 op) NOP (0 op) Instructions with two operands : destination (dest), source (src) MOV AX, BX Operation operand (dest), operand (src) (Opcode) (Order of dest and src is important, Must know on exams) SYSC3006 3 (p, )

WebDec 28, 2014 · 一般ax,cx,bx,dx,di,si,都可以，如果中间有可能别的代码会改变寄存器的值，注意保存还原就可以了。 熟能生巧，迟早熟练的只要肯下功夫。 个人建议16位的就不 … WebJan 1, 2010 · [Quote=引用 5 楼 tumen 的回复:] 我是这样想的：题目的意思是“下列寄存器组中在段内寻址时可以提供偏移地址的寄存器组”，AX，BX，CX，DX 四个寄存器都可以存偏移地址用于寄存器间接寻址，所以选A。

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WebMOV AX, [BX] ; Suppose the register BX contains 4895H, then the contents ; 4895H are moved to AX ADD CX, {BX} Based addressing mode. In this addressing mode, the offset address of the operand is given by the sum of contents of the BX/BP registers and 8-bit/16-bit displacement. Example MOV DX, [BX+04], ADD CL, [BX+08]

WebOct 1, 2016 · 1 Answer. mov bx, 0Ah mov cx, 5h push ax mov ax, bx mul cx mov bx, ax pop ax ;at this point, ax is unchanged, result is in bx. mov bx, 0Ah mov cx, 5h xchg ax, bx mul cx xchg ax, bx ;at this point, ax is unchanged, result is in bx. However, multiplication by a 16-bit register will leave its results in dx:ax. Since your example multiplies small ... agenzia delle dogane e dei monopoli ravennaWebJul 9, 2024 · 2个指针寄存器(ESP和EBP) 4个数据寄存器(EAX、EBX、ECX和EDX)：. 32位CPU有4个32位的通用寄存器EAX、EBX、ECX和EDX。. 对低16位数据的存取，不会影响高16位的数据。. 这些低16位寄存器分别命名为：AX、BX、CX和DX，它和先前的CPU中的寄存器相一致。. 4个16位寄存器又可分割成 ... agenzia delle dogane e dei monopoli modenaWebLower halves of the 32-registers can be used as 4 16-bit data registers: AX, BX, CX, DX 89 are correct about 32 bit Index registers of IA 32 processors: Answer: EDI: 32 bit pointer to destination memory in data movement instructions DI: 16 bit pointer to destination memory in data movement instructions SI: 16 bit pointer to source memory in ... mc-325 ガス警報器WebOct 19, 2024 · 通用暫存器. 14 個暫存器中有 8 個通用暫存器，其中 AX、BX、CX、DX 用於存放一般性的數據，這四個通用暫存器都是 16 位元，不過為了相容上一代 8 位元的 CPU，每個都可分為高位和低位兩個 8 位元的暫存器使用，例如 AX 是由高位 AH 和低位 AL 組成。. AX 可分為 AH ... mc30w ヨネックスWebax、bx、cx、dx 这四个寄存器一般用来存放数据，也被称为数据寄存器。它们的结构如下 它们的结构如下 8086 CPU 的上一代寄存器是 8080 ，它是一类 8 位的 CPU，为了保证兼容性，8086 在 8080 上做了很小的修改，8086 中的通用寄存器 AX、BX、CX、DX 都可以独立 … agenzia delle dogane e dei monopoli palermoWebNov 17, 2010 · mov bx, 1000H ;8086CPU不支持将数据直接送入段寄存器的操作 mov ds, bx ;ds存放数据段地址 mov [0], al ;将al数据（1字节）存到1000H段的0偏移地址处， … agenzia delle dogane e dei monopoli latinaWebAlgebra. Solve for x ax+bx=c. ax + bx = c a x + b x = c. Factor x x out of ax+bx a x + b x. Tap for more steps... x(a+b) = c x ( a + b) = c. Divide each term in x(a+b) = c x ( a + b) = c by a+b a + b and simplify. Tap for more steps... x = c a+ b x = c a + b. agenzia delle dogane e dei monopoli perugia