nasm汇编

badmonkey 2020年03月14日 532次浏览

nasm汇编环境配置

virtual box 6.1
nasm installer 链接提取码：llwj
fixvhdwr链接提取码：cuep

首先安装nasm installer，安装路径默认即可（可以以自己改

为了方便后续编译使用，将nasm添加到环境变量中（添加安装路径即可，不知道怎么添加环境变量的同学，可以google一下，非常简单

准备好写好的汇编程序，比如：

;
mov ax,0xb800 ;显存起点

mov es,ax  

; 文本模式
mov byte[es:0x00],'L'   ;字符
mov byte[es:0x01],0x07  ;前景色，背景色

mov byte[es:0x02],'a'
mov byte[es:0x03],0x07

mov byte[es:0x04],'b'
mov byte[es:0x05],0x07

mov byte[es:0x06],'e'
mov byte[es:0x07],0x07

mov byte[es:0x08],'I'
mov byte[es:0x09],0x07

mov byte[es:0x0a],' '
mov byte[es:0x0b],0x07

mov byte[es:0x0c],'o'
mov byte[es:0x0d],0x07

mov byte[es:0x0e],'f'
mov byte[es:0x0f],0x07

mov byte[es:0x10],'f'
mov byte[es:0x11],0x07

mov byte[es:0x12],'s'
mov byte[es:0x13],0x07

mov byte[es:0x14],'e'
mov byte[es:0x15],0x07

mov byte[es:0x16],'t'
mov byte[es:0x17],0x07

mov byte[es:0x18],':'
mov byte[es:0x19],0x07

; 显示字符Labeloffset：

mov ax,number  

mov bx,10

mov cx,cs
mov ds,cx

mov dx,0

div bx

mov [0x7c00+number+0x00],dl

xor dx,dx
div bx
mov [0x7c00+number+0x01],dl

xor dx,dx
div bx
mov [0x7c00+number+0x02],dl

xor dx,dx
div bx
mov [0x7c00+number+0x03],dl

xor dx,dx
div bx
mov [0x7c00+number+0x04],dl

mov al,[0x7c00+number+0x04]
add al,0x30

mov [es:0x1a],al
mov byte[es:0x1b],0x04

mov al,[0x7c00+number+0x03]
add al,0x30

mov [es:0x1c],al
mov byte[es:0x1d],0x04

mov al,[0x7c00+number+0x02]
add al,0x30

mov [es:0x1e],al
mov byte[es:0x1f],0x04

mov al,[0x7c00+number+0x01]
add al,0x30

mov [es:0x20],al
mov byte[es:0x21],0x04

mov al,[0x7c00+number+0x00]
add al,0x30

mov [es:0x22],al
mov byte[es:0x23],0x04

mov byte[es:0x24],'D'
mov byte[es:0x25],0x07


infi: jmp near infi  

number db 0,0,0,0,0

times 203 db 0

db 0x55,0xaa

随便起个名字，这里用mbr.asm(主引导程序)，切换到asm文件所在的目录下，通过如下语句，编译obj文件