init:
    .segments:
        mov ax, 0x07C0
        mov ds, ax
        mov ax, 0
        mov fs, ax
    .interrupt:
        mov [fs:0x08*4], word timer
        mov [fs:0x08*4+2], ds

        sti
main:
    hlt
    jmp main

timer:
        push ax
        push bx
        push bp
    mov ah, 0x0e
    mov al, 0x41
    int 0x10
        mov al, 20h
        out 20h, al
        pop bp
        pop bx
        pop ax
    iret

times 510-($-$$) db 0
dw 0xaa55