low-level-programming/lightshow.rs

#![feature(lang_items, start, no_core)]
#![no_core]
#![no_main]

#[lang = "eh_personality"]
extern fn eh_personality() {}

#[lang = "panic_fmt"]
fn panic_fmt() -> ! { loop {} }

#[lang = "sized"]
trait Sized {}

#[lang = "copy"]
trait Copy {}

#[no_mangle]
pub extern fn rust_entry() {

    //white A on black
    let spec: u16 = 0x0f_41;
    write_to_coord(0, 0, spec);

    loop {

    }

}

//const VRAM_OFFSET = 0xb8000;

fn write_to_coord(x: u8, y: u8, x86_specifier: u16) {
    unsafe {
        *(0xb8000 as *mut u16) = x86_specifier;
    }
}