Mov ax count bx 完成的操作是
NettetThere is for example MOV r16,r/m16 instruction in 16 bit real mode, which you are using at line mov ax, [bx], but there is no instruction like MOV r16,memory-by-indirection-from-other-memory with +2 offset, so when programming in assembly, you are expected to know the target instruction set, and write your solution with instructions which are … Nettet21. nov. 2016 · (1) Run mov ax,bx+si+1 through your assembler; inspect the binary code that gets generated. (2) Do the same for mov ax, [bx+si+1]. (3) Compare the two byte streams. I would not be surprised if both statements would generate the same code. – Ruud Helderman Nov 21, 2016 at 17:49 1 @Ped7g Yes, I use emu8086.
Mov ax count bx 完成的操作是
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Nettet24. jun. 2024 · mov ax,es:[1000h] 源操作数的寻址方式是()a立即寻址b直接寻址c寄存器相对寻址d寄存器间接寻址本题得分:1分正确答案: b解析 :mov ax,es:count[di] 源操作 … Nettet19. jun. 2024 · 指令格式: MOV AX, COUNT [SI] 或 MOV AX, [COUNT+SI] 假设 (DS)=3000H, (SI)=2000H, COUNT=3000H, 则: PA = 35000H 假设 (35000H)=1234H, …
Nettet关注 一道例题(DS)=2000H,(BX)=0100H,(SI)=0002H,(20100H)=12H,(20101H)=34H,(20102H)=56H,(20103H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=B7H,(21203H)=65H指出各条指令完成后AX寄存器中的内容MOV AX,1100H [BX]寄存器相对寻址,物理地址 = 20000H + 0100H + 1100H = 21200H则(AX)=4C2AH 我从网上找的,和你的意思一 … Nettet21. jun. 2013 · 基址寄存器: BX , BP. 变址寄存器: SI , DI. 与数据有关的寻址方式:. 立即寻址 MOV AX , 常数. 直接寻址 MOV AX , [常数] ;加上中括号 或 MOV AX , 变量名或标号. 寄存器寻址 MOV AX , 通用寄存器. 寄存器间接寻址 MOV AX , [ (BX,BP,SI,DI)中的一个] ;以下四行均需加上中括号. 寄存 ...
Nettet1. feb. 2024 · What is the difference between the following two lines? mov ax, bx mov ax, [bx] If bx contains the value 100h and the value at memory address 100h is 23, does … Nettet5. nov. 2024 · mov ax,count ;也可以表示为:mov ax, [count] ;假如操作系统为变量COUNT分配的有效地址是2000H ;则反汇编的指令形式为mov ax,ds: [2000H] ;再假设DS保存段地址为1492H ;则14920H+2000H=16920H ;将地址为16920H的内容传送给AX寄存器,高字节送给AH寄存器,低字节送给AL寄存器 mov指令不支持两个操作数都是存储器 …
Nettet8. jul. 2002 · mov ax, [value]是不允许的. 必须加上段前缀如. mov ax,ds: [value] 江南愚子 2002-07-08. 综合TopLevel ()和Areslee (易水)的就对了:. 第一个是指针指向的内容,意 …
Nettet14. nov. 2024 · Mov ax,1 is an immediate addressing mode which transfers (copy) integer 1 to ax register. Whereas Mov ax, num is a Register direct addressing mode which transfers value contains in num to ax register. For ASCII you use the following instruction: num db '1'; define 1 byte and initialize '1' ASCII value to memory. Mov ax,'1'. british summer time hyde park 2022Nettet30. jul. 2003 · mov ax,es: [bx] ;是指到为段地址为基址的存储器中将一个字的数据送至AX寄存器. GR 2003-07-30 1 这种问题学汇编的时候深有体会。 关键是要体会到地址 … british summer time hyde park taylor swiftNettet8. nov. 2024 · mov bx, ax ; save the old AH (and AL) cbw ; sign-extend AL into AX xchg bx, ax ; BX = sign-extended result, restore original AX Saving instructions on 8086 can involve planning what you keep in which register so it's already in the right place for an instruction like cbw or mul that uses an implicit register. british summer time or gmtNettet10. jan. 2024 · MOV AX,BX MUL MULNUM MOV BX,AX (如果乘10之后没有超过65535的话,就用不到DX),现在DX:AX中的值是65520 。 现在已经接收完了,用户输入回车,退出输入字符的循环,将DX:AX除10即可 逐步解释 LOOP1: CALL GET CMP CX,0 JZ ENDINPUT ADD COUNT,BX JMP LOOP1 首先一个循环CALL GET 看看GET子程序 … capital gain bonds 2021-22Nettet3. mar. 2024 · 操作数可能在的三个位置:指令、寄存器、内存;. 指令:立即数寻址(直接给出立即数,也就是偏移量,像250H、’a’都可以作为理解数). 寄存器:寄存器寻址(指令中给出的是寄存器的名字,比如AX、BX、CX、DX、IP等). 以上两种情形,在指令中都不 … british summer time permanentbritish summer time hyde park rolling stonesNettet18. jul. 2002 · 解答: mov ax, 2000h ;//把 2000h 送入 ax 中 mov ds, ax; //把 ax 的内容即 2000h 送入段寄存器ds中 mov bx,1000h;//把1000h送入bx中 mov ax , [bx]; //把内存单元 ( (ds)*16+ (bx))的内容. 若有两个4字节的无符号数相加,这两个数分别存放在 2000H 和3000H开始的单元中,将所求的和存放在 2000H ... british summer time hyde park wiki