#include int main() { // change the colors of VGA text // doesn't require a lot of code, but still shows that it's working uint8_t *vga = (void*) 0xB8000; for (int i = 0; i < 80 * 25; i++) vga[(i << 1) + 1] = 0x4e; // try to mess with kernel memory uint8_t *kernel = (void*) 0x100000; *kernel = 0; // should segfault }