Free bootable disk images

Download HamsterOS

Choose the image that matches your computer and floppy drive. Each download is a raw bootable disk image for writing to a floppy or mounting in an emulator.

Beta 3 .77.19

HamsterOS

The standard 32-bit edition for 386-class and newer PCs. Includes the VGA desktop, HamNet, HamChat, audio tools, games, and hard-disk installation.

File: hamster.img
Size: 1.44 MB (1,474,560 bytes)
Format: Bootable FAT12 floppy image (.img)
Requirements: 386 or newer, 2 MB RAM, VGA, 1.44 MB floppy drive or emulator

Version .78.1 · 720K edition

HamsterOS CGA

The standard CGA edition for 8086, 8088, and V20 computers. Use this image with a 720K drive or a compatible emulator.

File: hamster-cga-720k.img
Size: 720 KB (737,280 bytes)
Format: Bootable FAT12 floppy image (.img)
Requirements: 8086, 8088, or V20, 640K RAM, CGA, 720K floppy drive or emulator

Version .78.1 · 360K edition

HamsterOS CGA

The compact CGA edition for computers limited to a 360K floppy drive. It provides the same CGA desktop in a smaller disk image.

File: hamster-cga-360k.img
Size: 360 KB (368,640 bytes)
Format: Bootable FAT12 floppy image (.img)
Requirements: 8086, 8088, or V20, 640K RAM, CGA, 360K floppy drive or emulator

HamsterOS add-on software

Get More Software for HamsterOS

Self-contained programs for your HamsterOS hard drive. ZipZork is ready now, and Hamster Command is coming soon. Each package keeps its application, icon, and files together in one easy-to-unzip folder.

Get More Software for HamsterOS

Choosing an image

Use the image your drive supports.

1.44 MB: standard HamsterOS for 386-class and newer PCs with VGA.

720K: full HamsterOS CGA image for 8086, 8088, and V20 computers with a 720K drive.

360K: compact HamsterOS CGA image for machines limited to a 360K drive.

Need to write an image to a physical disk? HamsterWeazle supports floppy imaging on Windows and Mac.