ubuntu下运行bochs
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安装gcc编译环境
sudo apt-get install build-essential
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sudo apt-get install xorg-dev
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sudo apt-get install libgtk2.0-dev
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下载bochs最新版本
http://bochs.sourceforge.net/
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安装命令
$tar vxzf bochs-2.4.5.tar.gz
$cd bochs-2.4.5
$./configure --enable-debugger --enable-disasm
$make
$sudo make install
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安装nasm
sudo apt-get install nasm
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编译boot.asm
nasm boot.asm -o boot.bin
此处的boot.asm是一段汇编代码,在屏幕上打印出hello, OS world!
代码如下:
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org07c00h; 告诉编译器程序加载到7c00处
movax, cs
movds, ax
moves, ax
callDispStr; 调用显示字符串例程
jmp$; 无限循环
DispStr:
movax, BootMessage
movbp, ax; ES:BP = 串地址
movcx, 16; CX = 串长度
movax, 01301h; AH = 13, ?AL = 01h
movbx, 000ch; 页号为0(BH = 0) 黑底红字(BL = 0Ch,高亮)
movdl, 0
int10h; 10h 号中断
ret
BootMessage:db"Hello, OS world!"
times 510-($-$$)db0; 填充剩下的空间,使生成的二进制代码恰好为512字节
dw 0xaa55; 结束标志
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使用dd命令将它写进刚刚创建的软盘映像a.img的第一个扇区
dd if=boot.bin of=a.img bs=512 count=1 conv=notrunc
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此时还需要配置bochs的配置文件bochsrc,标准的配置文件格式为
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###############################################################
# Configuration file for Bochs
###############################################################
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# how much memory the emulated machine will have
megs: 32
# filename of ROM images
romimage: file=/usr/local/share/bochs/BIOS-bochs-latest
vgaromimage: file=/usr/local/share/bochs/VGABIOS-lgpl-latest
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# what disk images will be used
floppya: 1_44=a.img, status=inserted
# choose the boot disk.
boot: floppy
# where do we send log messages?
# log: bochsout.txt
# disable the mouse
mouse: enabled=0
# enable key mapping, using US layout as default.
keyboard_mapping: enabled=1, map=/usr/local/share/bochs/keymaps/x11-pc-us.map
接着便可以执行
bochs -f bochsrc
来运行bochsrc虚拟机。
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