src/lib.rs


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#![no_std]
#![no_main]

use core::panic::PanicInfo;

#[unsafe(no_mangle)]
pub extern "C" fn _start() -> ! {
    // 'k'
    print("kernel\n");
    loop {}
}

fn print(s: &str) {
    let mut bytes = s.bytes();
    while let Some(b) = bytes.next() {
        unsafe {core::arch::asm!(
            "out dx, al"
            , in("al") b
        )};
    };
}

#[panic_handler]
fn panic(_: &PanicInfo) -> ! {
    print("panicked");
    loop {}
}