Greg Nacu has released C64OS v1.0, his new, text-based operating system for the Commodore 64 with the minimum requirements of a SD2IEC card drive and joystick/mouse.
You can use its full-featured File Manager or go into the App Launcher. Over 25 utilities are available! For more information on getting started with C64OS, see
You can purchase C64OS in two different packages (bundles). The starter bundle at $59 Canadian (not including postage and any taxes) or the standard bundle at $64 Canadian (not including postage and any taxes). See
Whether you buy the starter bundle or the standard bundle, you get the pre-installed C64OS on a SD card and a very well-done, printed User's Guide Supplement, among other items.
For an up-to-date, comprehensive review of C64OS v1.0, go to Perifractic's Youtube video at
This is a fantastic OS for the C64. If only the REU was cheaper and 4 times the capacity back in the 80s could it have been successful. The C64 was never intended to run a graphic OS and GEOS's performance made it a displeasure to use. Unfortunately, the only people who would use this OS as a daily driver, have reason to use the 64 already. I'm a little disappointed that it cannot take advantage of the Ultimate II cartridge's REU abilities.
Re: C64OS v1.0 released!
Posted: Fri May 19, 2023 12:50 am
by rbernardo
C64 OS v1.03 has been released and now has support for the scroll wheel on a mouse connected through a MicroMys/MouSTer and support for mounting .D64, .D71, and .D81 files. You can update the earlier version(s) of the OS by going to the download page at
C64OS gets better and better! Version 1.04 has been released, the Multimedia Release. In this version, there is a new graphics file format called “Commodore Grafix” which has support for metadata, variable frame rate sizes, native/non-native video modes, multi-frame matrix images, including 3D models, panoramas, and animation sequences. There are the new and/or improved Creator Tool and C64 Archiver, and the new SID Preview Utility with a SID Search Service. Finally, the gfx.lib supports character-mode graphics. (Some new features only available with the use of a RAM expander) Whew!
Check out the more complete descriptions of C64OS v1.04 and short videos of the Multimedia Release at