section .text
org 0x7c00
start:
    
    push dx
    
    mov ax, 0
    mov ds, ax
    mov es, ax
    mov gs, ax
    mov fs, ax
    
    mov ax, 0x7e00
    mov ss, ax
    
    mov sp, 256
    mov bp, 256
    
    mov ax, 0x7c00
    add ax, 446
    ; ax now points to the start of the partition table
    
    mov di, 0
    
    
    
.search_partition:
    
    mov bx, ax
    add bx, 4
    mov cl, [bx]
    cmp cl, 0x9d
    je .found_partition
    
    inc di
    cmp di, 4
    je .no_boot_partition
    add ax, 16
    
    
    
.found_partition:
    
    mov bx, ax
    add bx, 14
    mov cx, [bx]        ; more than 65536 sectors will NOT be
                        ; supported for the bootloader's partition!
    
    mov bx, 0x8000
    mov es, bx
    mov di, 0x0000
    
    mov bx, ax
    inc bx
    ; bx now points to the CHS-address of the first sector
    ; of the bootloader's partition.
    
    mov dx, [bx]
    mov ah, dh          ; head
    mov bl, dl          ; sector
    
    add bx, 2
    ; bx now points to the CHS-cylinder of the first sector
    ; of the bootloader's partition.
    
    mov al, [bx]        ; cylinder
    
    call load_sectors
    
    
    
.no_boot_partition:
    
    hlt

%include "gdt.asm"
%include "utility.asm"