Bochs + freedos安装配置

sudo apt-get install build-essential

sudo apt-get install xorg-dev

sudo apt-get install libgtk2.0-dev

下载

bochshttp://bochs.sourceforge.net/cgi-bin/topper.pl?name=See+All+Releases&url=http://sourceforge.net/projects/bochs/files

$ tar vxaf bochs-2.5.1.tar.gz

$ cd bochs-2.5.1

$ ./configure –enable-debugger-enable-disasm

$ make

$ sudo make install

下载freedoshttp://bochs.sourceforge.net/diskimages.html 复制到工作目录下

Bochs 配置 先通过dos引导，我们的软件复制在B盘下

############################################################### 
# Configuration file for Bochs 
###############################################################

# how much memory the emulated machine will have 
megs: 32

# filename of ROM images 
romimage: file=/usr/share/bochs/BIOS-bochs-latest 
vgaromimage: file=/usr/share/vgabios/vgabios.bin

# what disk images will be used 
floppya: 1_44=freedos.img, status=inserted 
floppyb: 1_44=pm.img, status=inserted

# choose the boot disk. 
boot: a

# 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/share/bochs/keymaps/x11-pc-us.map

#enabled debug using xchg bx, bx

magic_break:enabled=1

可以通过下面方式来部署程序，当然，写成makefile最省事

$ sudo mount –o loop pm.img /mnt/floppy

$ sudo cp test.com /mnt/floppy

$ sudo umount /mnt/floppy

bochs 调试

调试方法很多，这里介绍最简单的方式之一。bochs 配置中增加 magic_break:enabled=1

代码中增加xchg bx, bx，bochs会停在代码出。当然，前提是bochs需要支持debug