[英]OS Development - booting from floppy drive using qemu
I have been reading BrokenThorn's OS development tutorial and am at the part of creating and loading the second stage bootloader. 我一直在阅读BrokenThorn的操作系统开发教程,我正在创建和加载第二阶段引导加载程序。 The tutorial is for Windows, but I am doing this in Linux(Ubuntu 13.04).
本教程适用于Windows,但我在Linux(Ubuntu 13.04)中这样做。
This is what I have done: 这就是我所做的:
floppy.img
under ~/Documents/floppy
with the mkfs.vfat
command mkfs.vfat
命令在~/Documents/floppy
下创建文件floppy.img
boot.asm
file using nasm giving me boot.bin
boot.asm
文件给我boot.bin
dd if=boot.bin of=~/Documents/floppy/floppy.img bs=512 count=1
dd if=boot.bin of=~/Documents/floppy/floppy.img bs=512 count=1
Thus I have the floppy image with the first stage bootloader. 因此,我有第一阶段bootloader的软盘映像。 On starting that using qemu, it works fine.
在使用qemu开始时,它工作正常。
However, after I create the second stage bootloader, (if I am correct)I would have to mount the floppy.img
and copy stage 2 on to the mounted filesystem. 但是,在我创建第二阶段引导加载程序后,(如果我是正确的)我将必须安装
floppy.img
并将第2阶段复制到已安装的文件系统上。 In such a case, how can one boot a mounted floppy using qemu ? 在这种情况下,如何使用qemu启动已安装的软盘? Is it even possible ?
它甚至可能吗? If not, how do I work with the second stage bootloader.
如果没有,我如何使用第二阶段引导加载程序。
Please forgive me for any stupid assumption/question as I am new with this. 请原谅我任何愚蠢的假设/问题,因为我是新手。
Where is your problem? 你的问题在哪里? You mount the image:
你装载图像:
mount -oloop ~/Documents/floppy.img /mnt/floppy
Copy the stage2: 复制stage2:
cp stage2.bin /mnt/floppy
Unmount it: 卸下它:
umount /mnt/floppy
And launch it with QEMU: 并使用QEMU启动它:
qemu -fda ~/Documents/floppy.img
Voilà! 瞧!
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