v0.2.2 - Boot Loader with Graphical Hello World

UnoDOS v0.2.2

First bootable release with graphical output.

Features

• 512-byte boot sector loads from floppy
• Second stage loader with debug messages
• Memory and video adapter detection
• CGA 320x200 4-color graphics mode
• Graphical "HELLO WORLD!" display
• MDA text-mode fallback

Downloads

• unodos.img - 360KB floppy image (target platform)
• unodos-144.img - 1.44MB floppy image (modern testing)

Usage

Write to floppy with:

# Linux
dd if=unodos-144.img of=/dev/fd0 bs=512

# Or use included scripts
./tools/writeflop.sh /dev/fd0

Testing in QEMU

qemu-system-i386 -M isapc -m 640K -fda unodos-144.img -boot a