screensaver-asm A bouncing square screensaver-like thing in x86 real mode. This could probably be optimized further, but as of now its 251 bytes. Run make qemu References https://en.wikipedia.org/wiki/BIOS_interrupt_call https://en.wikipedia.org/wiki/Mode_13h PC Interrupts: A Programmer's Reference to BIOS, DOS, and Third Party Calls