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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

WebNov 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， … 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 …

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Webbx: (1)在xlat指令中,作基址寄存器 (2)还可以作为存放地址的寄存器构成寄存器间接寻址或者基址寻址 cx:在循环指令和重复前缀中,作循环次数计数器 cl:在移位指令中,做移位次数计 … clare charities https://ardorcreativemedia.com

General Registers (AX, BX, CX and DX) - vulms.vu.edu.pk

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 … 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 ... 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 … clare character in passing

【汇编】各种寄存器介绍 - wisehead - 博客园

Category:assembly - mov ax, bx vs. mov ax, [bx] - Stack Overflow

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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

EAX、ECX、EDX、EBX寄存器的作用 - CSDN博客

WebJul 1, 2014 · 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8个独立的8位寄存器(AX：AH-AL、BX：BH-BL、CX：CH-CL、DX：DH-DL)，每个寄存器都有自己的名称，可独立存取。 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]

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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WebLower 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 ... WebClosed 5 years ago. The x86 assembler language has had to change as the x86 processor architecture has changed from 8bit to 16bit to 32bit and now 64bit. I know that in 32bit assembler register names (EAX, EBX, etc.), the E prefix for each of the names stands for Extended meaning the 32bit form of the register rather than the 16bit form (AX, BX ...

Web0402Other Imaging Services - Ultrasound 0972Professional Fees - Radiology - Diagnostic 76514 OPHTHALMIC ULTRASOUND, DIAGNOSTIC; CORNEAL PACHYMETRY, … 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。

Web99999Not Applicable 65855TRABECULOPLASTY BY LASER SURGERY ICD-10 Codes Description H40.011 - H40.019 Open angle with borderline findings, low risk, right eye - … Web8个通用寄存器（ax、bx、cx、dx, sp, bp, si, di） 1个标志寄存器 (flags) 1个指令指针寄存器 (ip) 4个段寄存器（cs, ds, es, ss） 那些年 mov没有做过的事：1、两个操作数不能同时为存储器、段寄存器 2、不能用立…

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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 … clare charityWebNov 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 … clare cherikoffWebComputer 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. downloadable american flagWebMar 22, 2024 · The ADA has a number of requirements for accessible parking. This fact sheet from the ADA National Network outlines the requirements for parking under the … clare child hhdaWebThe 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 ... clare chenery downWebMOV DX, [SI+100] MOV [DI+3],BH: Utiliza un registro base o índice más un desplazamiento para acceder a los datos en la memoria. Directo: MOV Array[5], DX: MOV AX,VAR5: Se ven involucradas variables de memoria de datos: Relativo a Base mas índice: MOV CL, EDAD[BX+SI] MOV DATA[BP+SI], AX: Es útil para direccionar un arreglo de memoria ... clare cherkasky attorneyhttp://www.sce.carleton.ca/courses/sysc-3006/s13/Lecture%20Notes/Part5-SimpleAssembly.pdf clare chemical research inc