Kali use the system to make the easiest OS

Making the easiest OS

First, generate .bin file

1. Create Boot.asm file, enter the appropriate assembly code

org 07c00h     ; 
mov ax, cs
mov ds, ax
mov es, ax
call DispStr   ;
jmp $
DispStr:
mov ax, BootMessage
mov bp, ax
mov cx, 16
mov ax, 01301h
mov bx, 00ch
mov dl, 0
int 10h
ret
BootMessage:   db "Hello,OS world!"
times 510-($-$$) db 0
dw 0xaa55

2. Using NASM compiled Boot.asm file Boot.bin

nasm Boot.asm -o Boot.bin

Two, dd floppy image production

1. Copy the Boot.bin to Boot.img

dd if=Boot.bin of=Boot.img bs=512 count=1

2. Create a blank floppy disk image file diska.img

dd if=/dev/zero of=diska.img bs=512 count=2880

3. Copy the contents diska.img added subsequent to the first 512 bytes of Boot.img

dd if=diska.img of=Boot.img skip=1 seek=1 bs=512 count=2879

（seek=x从输出文件开头跳过x个扇区，skip=x从输入文件开头跳过x个扇区）