bootinit?

; This is a comment [ORG 0x7C00];This just tells the program where it is in the memory. Not important [BITS 16];Not important too. jmp start ; Jump over BIOS parameter block start:;The label for the start of the actual program push cs;Put cs onto the stack pop ds;Take it out and put it into ds mov si,Print_loading ;Print loading message call printstring ;Call is like jump, but it goes back. Like a function ;The complicated bit: Loads the next program mov ah,02h ;When ah=, int13 reads a disk sector mov al,4 ;Al is how many sectors to read mov ch,0 ;The track to read from mov cl,2 ;Sector Id mov dh,0 ;Head mov dl,0 ;Drive (0 is floppy) mov bx,0x1000 ;Es and Bx put together are where to load the program too (see jmp 0x1000:0x00) mov es,bx mov bx,0x00 int 13h ;Int 13 is all functions for disks mov si,putdot ;Print a ".". call printstring jmp 0x1000:0x00 ;Run Bootinit from stack. printstring: ;Print string routine. mov ah,0eh ;Mov ah into 0, so int 10 prints stringloop: ;The following code loads each seperate charcter so it can be printed lodsb cmp al,00 ;If al =0, then the string has all been loaded je endstring int 10h ;When int 10 is called, and ah=, it prints jmp stringloop endstring: ret ;Ret returns putdot db '.',0 Print_loading db 13,10,'Loading Easy OS v0.01a...',0 times 425 db 0;wastes 425 bytes on purpose, so the sector is full (The program must be 512 bytes long)

I was looking at someone elses code, and right above printstring there is a jmp 0x1000:0x00. Why is it jumping there?

Here's the site: http://www.groovyweb.uklinux.net/index.php...your%20own%20os

; This is a comment [ORG 0x7C00];This just tells the program where it is in the memory. Not important [BITS 16];Not important too. jmp start ; Jump over BIOS parameter block start:;The label for the start of the actual program push cs;Put cs onto the stack pop ds;Take it out and put it into ds mov si,Print_loading ;Print loading message call printstring ;Call is like jump, but it goes back. Like a function ;The complicated bit: Loads the next program mov ah,02h ;When ah=, int13 reads a disk sector mov al,4 ;Al is how many sectors to read mov ch,0 ;The track to read from mov cl,2 ;Sector Id mov dh,0 ;Head mov dl,0 ;Drive (0 is floppy) mov bx,0x1000 ;Es and Bx put together are where to load the program too (see jmp 0x1000:0x00) mov es,bx mov bx,0x00 int 13h ;Int 13 is all functions for disks mov si,putdot ;Print a ".". call printstring jmp 0x1000:0x00 ;Run Bootinit from stack. printstring: ;Print string routine. mov ah,0eh ;Mov ah into 0, so int 10 prints stringloop: ;The following code loads each seperate charcter so it can be printed lodsb cmp al,00 ;If al =0, then the string has all been loaded je endstring int 10h ;When int 10 is called, and ah=, it prints jmp stringloop endstring: ret ;Ret returns putdot db '.',0 Print_loading db 13,10,'Loading Easy OS v0.01a...',0 times 425 db 0;wastes 425 bytes on purpose, so the sector is full (The program must be 512 bytes long) I was looking at someone elses code, and right above printstring there is a jmp 0x1000:0x00. Why is it jumping there? Here's the site: http://www.groovyweb.uklinux.net/index.php...your%20own%20os

Never mind, I feel dumb for even asking. I got it figured out now.