TetrisOS and BreakoutOS: Assembly Language Projects for Computer Organization

TetrisOS and BreakoutOS are projects developed for a sophomore-level computer organization course. Each project teaches a wide range of x86 assembly language topics, including iteration, function calls, data storage, segmentation, communication with devices, and polling-based and interrupt-based I/O. They run "bare-metal" and avoid system calls. Each game can run natively on any PC and boot from a USB stick. The projects were tested on six classes of students over three semesters at two universities, and though rigorous, had a high completion rate.