Booting a Kernel In The Middle Of a Floppy

boot.asm

org 7C00h

    mov ax, 1000h 
    mov ss, ax 
    mov sp, 0		; Points to the top of the stack
    mov ax, cs 
    mov ds, ax 

    mov ah, 02h 	; Read sub function 
    mov al, 1		; Number of sectors to read 
    mov ch, 0		; Cylinder 
    mov cl, 2		; Sector 
    mov dh, 0		; Head 
    mov dl, 0		; Drive (00h = A:) 
    mov bx, 0800h	; ES:BX Points to the memory location
    mov es, bx		; Where the data will be written 
    mov bx, 0		; 0800:0000h (ES = 0800h, BX = 0000h) 
    int 13h		; Floppy interrupt
    
    ; Turn off the floppy drive
    mov   dx,3F2h
    mov   al,0
    out   dx,al