x86-64 Operating System

An Operating System based on x86-64 architecture.

1. Make a blank hard disk image

• Before building our OS and make final image, we need a blank hard disk image, We will use bximage to make it with:

  • Size 100 megabytes.
  • Sector size is 512 bytes.
  • Kind of image is flat.

• this is done by run image.sh script, the output image is boot.img file.

2. Build the OS

• The OS using make to build final image.

3. Simulate the OS

• To simulate the OS, we can use Bochs x86 Emulator 2.7, first generate a bochs configuration file (this is done automatically by run image.sh script). And then, make to build our OS. And finally run bochs command to start simulating.

• The second option to simulate our OS is using QEMU, after build our OS with make, simply run command: qemu-system-x86_64 -cpu qemu64,pdpe1gb -hda boot.img

4. Mount the OS image to your computer

mount -t vfat boot.img /mnt/d/

5. Test the OS

• Build & Mount image to the OS & Running:

make run

• System booting look like:

• List files in root directory with ls command:

ls.bin

• You can create, edit, delete files on the image via command in your host, because the image was mounted to /mnt/d directory. For example:

echo "Test file system" > /mnt/d/test.doc

• After that check the file content by our OS cat command:

cat test.doc

• And also, you can run binary files by specifying the file name. For example, we need to run process4.bin program:

process4.bin

• In addition, we have many features waiting for you to experiment :).

6. Test on the real machine

• After build the OS, copy our image to the USB device:

sudo dd if=boot.img of=/dev/sdb

• Plug the USB to your machine, booting it with the USB.

7. Building user program

• Please build program with our C/C++ runtime library.