%include "macros.inc"

section .data
    pit_count       dq      0

    format_str      db      "Current timer count: %ld\n", 0

section .text

extern printf, pic_master_eoi
global pit_interrupt



pit_interrupt:
    pushaq
    mov rax, [pit_count]
    inc rax
    mov [pit_count], rax

    and rax, 256            ; display message every ~2.5s (assuming PIT has a period of 10ms)
    jnz .done

    mov rcx, format_str
    mov rdx, pit_count
    call printf

    .done:
    call pic_master_eoi
    popaq
    iretq