os8088 is a graphical operating system that boots directly from a floppy on an Intel 8086/8088-based IBM PC/XT, providing a Macintosh System 1-style desktop with overlapping windows, pull-down menus, and pre-emptive multitasking—features not present in the original 1984 Macintosh. Written entirely in real-mode assembly and fitting within 256KB of RAM, it supports VGA, Hercules, and CGA displays, runs multiple loadable programs simultaneously, and includes applications like Minesweeper, a text editor, and a MOD music player. This hobby project revives an early Macintosh-like GUI on original-era hardware without relying on DOS, offering a modern take on retro computing through open-source code and real hardware demonstrations.
Os8088 — a Mac-style GUI OS for the IBM PC XT
