[org 0x7C00]
[bits 16]
jmp start
bootDisk: db 0x00
errorMessage: db 'Drive Error',0
errorMessage2: db 'Display Error',0
global start
start:
    mov [bootDisk], dl
    ;Set up segments
    cli
    mov ax, 0x00
    mov ds, ax
    mov es, ax
    mov ss, ax
    mov sp, 0x6C00
    sti

    ;Read disk
    mov ah, 2
    mov al, 60 ; sector count
    mov dl, [bootDisk]
    mov cl, 2
    mov ch, 0
    mov dh, 0
    mov bx, 0x7E00
    int 0x13
    jc derror

    mov ax, 0
    mov es, ax

    mov ah, 0
    mov al, 3
    int 0x10

        jmp end
verror:
    lea si, [errorMessage2]
    jmp loop
derror:
    lea si, [errorMessage]
loop:
    mov al, [si]
    cmp al, 0
    je loop
    inc si
    mov ah, 0xE
    int 0x10
    cmp al, 0
    jnz loop
    jmp $

    times 510-($-$$) db 0
    dw 0xAA55
end: