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 ... 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.
关于汇编里面的PTR--天哪,终于弄懂了 - CSDN博客
WebDetroit Map. Detroit is the largest city in the state of Michigan and the seat of Wayne County. Detroit is a major port city on the Detroit River, in the Midwestern United States. It … 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 ... philly hotels with hot tub suites
说明下列指令中源操作数的寻址方式。(X1为内存变量,VALUE为常 …
WebNov 27, 2014 · - Để xác định rõ hoạt động của bộ nhớ, ta phải dùng thêm toán tử PTR như sau :. Hoạt động 8 bit : BYTE PTR [1000h] là tham khảo 1 byte bộ nhớ có địa. chỉ 1000h. Hoạt động 16 bit : WORD PTR [1000h] là tham khảo đến 2 … WebDec 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 … 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. tsb base rate