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Inc byte ptr si+3 有效地址: 物理地址 。

WebJan 30, 2010 · 将DS:BX指向的内存地址中的16位数读到AX里面。. MOV是数值传送指令,AX是目的操作数,WORD PTR表示后面的储存单元是字类型, [BX]表示用BX的值来寻址,默认段地址是DS的值。. BMCRNET 2008-03-13. MOV AX WORD PTR [BX] ;将指向 [BX]地址的内容送如AX,以字为单位. Web答:(1)指令MOV AL, [BX+5]中内存操作数的所在地址=(DS)*10H+(BX)+5;. (2)指令MOV [BP+5],AX中内存操作数的所在地址=(SS)*10H+(BP)+5 …

x86, difference between BYTE and BYTE PTR - Stack Overflow

WebNEG BYTE PTR [DI+0010] h. MUL DX. i. IMUL WORD PTR [BX+SI] j. DIV WORD PTR [SI+0030] k. IDIV WORD PTR [BX][SI+0030] Verify these instructions are in the memory. How many bytes of memory do the instructions take up? Note: For instructions j and k, you may encounter an interrupt/exception. Try to find the reason behind it, and modify the contents ... Web解答一. 举报. 设DS=8225H,DI=3942H,指令INC BYTE PTR [DI] 操作数的物理地址是=(DS)×16+有效地址=82250+3942H=85B92H. INC BYTE PTR [DI]这个指令的含义:将该 … how is synthroid absorbed https://lillicreazioni.com

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WebNEG BYTE PTR [DI+0010] h. MUL DX. i. IMUL WORD PTR [BX+SI] j. DIV WORD PTR [SI+0030] k. IDIV WORD PTR [BX][SI+0030] Verify these instructions are in the memory. How many … WebMay 13, 2008 · add al,100. (2)在没有寄存器名存在的情况下,用操作符 X ptr 指明内存单元的长度,X在汇编指令中可以为word或byte。. 例如:. 下面的指令中,用word ptr 指明了指令访问的内存单元是一个字单元:. mov word ptr ds: [0],1. inc word ptr [bx] inc word ptr ds: [0] add word ptr [bx],2. 下面的 ... WebMay 2, 2012 · 2 Answers. Sorted by: 13. In the cases you're looking at, the byte ptr and word ptr don't accomplish much. While harmless, the assembler already "knows" that al and dl are byte-sized, and that bx is word-sized. You need something like byte ptr when (for example) you move an immediate value to an indirect address: mov bx, some offset mov [bx], 1. how is synthroid supplied

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Category:1. 试描述指令 INC BYTE PTR [BX]的执行过程,并画出该 …

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Inc byte ptr si+3 有效地址: 物理地址 。

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WebOct 20, 2024 · MOV CL, BYTE PTR AWORD ;get first byte MOV CL, BYTE PTR AWORD + 1 ;get second byte Field Values: type This field can have one of the following values: BYTE, WORD, DWORD, QWORD, TBYTE, NEAR, FAR. name This field can be: 1. A variable name. 2. A label name. 3. An address or register expression. 4. An integer that represents an offset. WebApr 23, 2006 · 几个简单问题。. 鄙人实在不懂汇编 ---2-CSDN社区. 急急急!. !. !. 几个简单问题。. 鄙人实在不懂汇编 ---2. 寄存器及存储单元的内容,若该指令影响标志位(CF、OF、SF和ZF)则指出其值。. 寄存器及存储单元的内容,若该指令影响标志位(CF、OF、SF和ZF)则指出 ...

Inc byte ptr si+3 有效地址: 物理地址 。

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WebNov 25, 2011 · 回答:BYTE PTR这样的叫属性修饰符,具体来说,就是操作数为字节;相应的,WORD PTR操作数为字。. 所以,MOV BYTE PTR [BP],20H. 的结果,把立即数20H放到DS X 10H+BP,亦即地址21000+6200=27200H的内容为20H;. 而MOV WORD PTR [BX],2000H. 的结果,27200H处为00H,27202H处为20H,按INTEL的 ... Web(1)inc byte ptr[si+3];的有效地址,物理地址。 (2)mov bx,es:[si+bx+3];的有效地址,物理地址。 5:设堆栈指针sp的初值为2000h,ax=3000h,bx=5000h,试问 (1) …

http://yimitumi.com/2024/03/30/%E5%8D%81%E4%B9%9D-word-ptr-%E5%92%8C-byte-ptr-%E6%B1%87%E7%BC%96%E7%AC%94%E8%AE%B0/ Webmov byte ptr[si+01h],30h inc byte ptr[si] cmp byte ptr[si],36h jb c1 mov byte ptr[si],30h mov byte ptr[si+01h],30h c1: nop endm delay macro ;delay 1s mov ax,0002dh mov bx,07fffh d1: dec bx jnz d1 mov bx,07fffh dec ax jnz d1 endm data segment time db 30h,30h data ends ...

Web(2)mov [bp+5],ax(3)inc byte ptr [si+3](4)mov dl,es:[bx+di](5)mov bx,[bx+si+2]答:(1)指令mov al,[bx+5]中内存操作数的所在地址=(ds)*10h+(bx)+5;(2)指令mov [bp+5],ax中内存操作数的所在地址=(ss)*10h+(bp)+5和(ss)*10h+(bp)+6;(3)指令inc byte ptr[si+3]中内存操作数的所在地址=(ds)+(si)+3;(4)指令mov dl,es:[bx+di]中 ... Web把地址si+5处的字节变量加1。 byte ptr 表示变量是字节变量。如果不指定,编译器就不知道变量的类型。 当然,也有word ptr, dword ptr等等。

WebMOV WORD PTR [BP],20H。. 其中的: BYTE PTR 或 WORD PTR, 就是说明: 8 位数或 16 位数的。. BYTE PTR这样的叫属性修饰符,具体来说,就是操作数为字节;相应的,WORD PTR操作数为字。. 的结果,27200H处为00H,27202H处为20H,按INTEL的反字节顺序存放 …

WebOct 20, 2024 · Here the PTR operator is used to specify the type of the operand. The following examples illustrate this use: MOV WORD PTR [BX], 5 ;set word pointed to by BX = 5 INC DS:BYTE PTR 10 ;increment byte at offset 10 ;from DS. This form can also be used to override the type attribute of a variable or label. how is syphilis diagnosedWebMar 30, 2024 · 用byte ptr指明了指令访问的内存单元是一个字节单元。 mov byte ptr ds:[0], 1 inc byte ptr [bx] inc byte ptr ds:[0] add byte ptr [bx], 2 在没有寄存器参与的内存单元访问指 … how is synvisc injected into the kneeWebApr 8, 2024 · Then add word ptr [freq_array + eax * 2], 1. In 32-bit code you can take advantage of its more powerful addressing modes (compared to 16-bit). Also note that your code would be unsafe if freq_array spans a 64k boundary; add si, ax could wrap without doing carry-out into the high bits of ESI. – Peter Cordes. how is synthetic paper madeWebNov 10, 2024 · 1)指令mov al,[bx+5]中内存操作数的所在地址=(ds)*10h+(bx)+5;(2)指令mov [bp+5],ax中内存操作数的所在地址=(ss)*10h+(bp)+5和(ss)*10h+(bp)+6;(3)指令inc … how is syslog usedWeb3 试指出下列传送类指令的寻址方式1.mov ax,100[bx][di]2.mov var[bx],ax3.mov [bp],si4.mov byte ptr[bx+si],1005.push bx; 4 计算机原理与接口技术2到题写出以下指令中内存操作数的所在地址。(1)mov al,[bx+10] (2) mov [bp+10],ax(3) inc byte ptr[si+5] (4) mov dl,es:[bx+si](5) mov bx,[bp+di+2] 分别说明 ... how is synvisc madeWebJan 2, 2015 · 应改为:mov ax,bx moval,bl (2)moval,sl 错,si 寄存器不能分为高8 位使用,即没有sl寄存器。应改为:mov ax,si (3)inc [bx] 错,未指定操作数的类型。应改为:inc byte ptr [bx] (4)mov 5,al 错,目的操作 数使用了立即数,在指令中一般不允许。 how is system performance measuredWebDec 15, 2024 · byte ptr-> it simply means that you want to fetch a byte from the address. if it said word ptr or dword ptr, you would get a word or dword from the address in source … how is syphilis spread from person to person