gba/examples/hello_magic.rs

#![no_std]
#![feature(start)]

#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
  loop {}
}

#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
  unsafe {
    (0x400_0000 as *mut u16).write_volatile(0x0403);
    (0x600_0000 as *mut u16)
      .offset(120 + 80 * 240)
      .write_volatile(0x001F);
    (0x600_0000 as *mut u16)
      .offset(136 + 80 * 240)
      .write_volatile(0x03E0);
    (0x600_0000 as *mut u16)
      .offset(120 + 96 * 240)
      .write_volatile(0x7C00);
    loop {}
  }
}