1.Envirment:

(see appendix Envriment create)

2.source

; 文件名 boot.asm org 7c00h                     ; BIOS读入MBR后，从0x7c00h处开始执行 ; 下面部分和10h有关中断，10h中断用来显示字符mov ax, csmov es, axmov ax, msgmov bp, ax                    ; ES:BP表示显示字符串的地址mov cx, msgLen                ; CX存字符长度mov ax, 1301h                 ; AH=13h表示向TTY显示字符，AL=01h表示显示方式（字符串是否包含显示属性，01h表示不包含）mov bx, 000fh                 ; BH=00h表示页号，BL=0fh表示颜色mov dl, 0                     ; 列int 10h  msg: db "hello world, welcome to OS!"msgLen: equ $ - msg           ; 字符串长度times 510 - ($ - $$) db 0     ; 填充剩余部分dw 0aa55h                     ; 魔数，必须有这两个字节BIOS才确认是MBR

3.Compile

If till not install nasm, should install first.

nasm install on ubuntu

1.Download source code:

2.tar zxvf nasm-2.10.07.tar.gz

进入刚解压的目录

然后执行命令：./configure

make

sudo make install

NOTE: Using "apt install nasm" to install is failled.

nasm usage

If only want to run without debugging, only input bellow:

# nasm boot.asm -o boot.bin

If want gdb can regcnise the format, should do more, convert it into ELF file format.

# nasm -f elf -g boot.asm -o boot.o

# gcc -c boot.o -o boot

If the gcc is bit32, should install some lib, as bellow:

sudo apt-get install g++-multilib libc6-dev-i386

then

# gcc boot.o -o boot -m32

4.Command line Debug

NOTE: Must copy the linux 0.11 project to windows disk, cannot in samba server, or not can't debug.

QEMU version: Download latest version from official site.

Input command:

"C:\Program Files\qemu\qemu-system-x86_64.exe" boot.bin"C:\Program Files\qemu\qemu-system-x86_64.exe" -m 16M -boot a -fda boot.bin -s -S

-s wait gdb connection to port 1234

'-S' means freeze CPU at startup (Can be remove to run directly), so you can debug step byt step.

After input the command, the linux 0.11 would be running succe

Open other cmd windows, then input:

F:\Linux-0.11-master>gdb Image

(gdb) target remote localhost:1234

(gdb) b *0x7c00

(gdb)c

(gdb)x /16b 0x7df0 //观察0x7DFE和0x7DFF的值是否为0x55，0xAA

(gdb)

Then you would see the linux 0.11 is running successfully.

Can using "Ctrl+C" to stop running.

Appendix 1 Envriment create

1.VM-Envriment:windown 7, vmware(ubuntu-18.04.1-live-server-amd64.iso), SecureCRT(ssh remote ubuntu), samba-server(see appendix samba-server create).

2.Destnation-machine: QEMU(download from official site),

3.Debug-method: TDMGCC(Using its GDB in command line debug).