What's New!
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the newest features and the most recent releases.
C64 OS v1.07 is currently available for purchase, and includes access to free software updates. The printed User's Guide is now 50 color pages and an updated cover design. New content covers the latest features from new Utilities, to hidden files, Fast App Switching and networking.
The Standard Bundle is now joined by an Extended Bundle. Both include pre-configured CMD HD disk image and IDE64 disk image for use in VICE. All the newest libraries, drivers, tools and Utilities are included. Many new system-level features have been added and bugs have been fixed. The Extended Bundle includes, as bonuses, commercial copies of Eliza for C64 OS and the Desktop Designer Application, as well as coming bundled with additional media files.
Already purchased C64 OS?
Update to v1.08 for free.
If you purchased a copy of C64 OS (v1.x), you can download system updates for free.
They are installed in a few simple steps with the built-in Installer.
World Explorer - Released Summer 2025
Explore the world by peeking in on live webcams from cities around the globe, all from your Commodore 64 running the latest version of C64 OS.
Points of interest
Zoom in on one of 6 continents and see the list of cities available.
Click the map to find a city or pick a city from the slide-out drawer on the right. The country where that city is found and the latitude and longitude are shown too.
A crosshair icon appears above where the city is on the map.
View a webcam from that city
With a city selected, choose Update Webcam from the View menu.
Video frames from that webcam are fetched once every 30 seconds and rendered to the C64's bitmap screen in multi-color mode. The name of the city is displayed at top left and the city's local time is displayed at bottom right.
Tap into over 40 live webcam streams from 6 continents around the globe. World Explorer is a lot of fun, and it makes for a fantastic self-running demo of the Commodore 64's abilities at parties, user group meetings, tradeshows and expos.
What's new in v1.08
C64 OS version 1.08 fills in some pieces that have been missing since v1.0 that make using the core of C64 OS—File Manager and App Launcher—more powerful, more convenient and more fun.
App Launcher can now show backdrops with more graphical depth, and backdrops can be inverted from a menu option. You can now name your desktops to make them more personal and easier to remember. In File Manager, favorites become much more useful with the new favorites editor. Reorganize the favorites in a snap or remove the ones you don't use anymore. PRG Alias Maker comes bundled now. Networking is faster and more reliable with new and updated drivers for more networking hardware. If you use an REU, after you quit to BASIC, just hold CONTROL and tap RESTORE to jump straight back into C64 OS.
Name Your Desktops
In App Launcher choose Rename from the new Desktop menu under the Options menu.
With the Desktop Rename Utility you can assign names to all 5 desktops. Along with custom backdrops and a hint color, desktops can be named based on the kinds of things you store on them.
The names appear in the Go menu for switching between desktops, as well as in the Copy To and Move To menus. Naming desktops makes them more personal and easier to navigate.
Edit Your Favorite Places
The favorites sidebar has been available in File Manager and the Open and Save dialog boxes since C64 OS version 1.0. And now, finally, there is a dead-simple way to manage them.
Choose Favorites from the Options menu in File Manager. Click to select the one you want to move, and click the up/down arrows to move it up or down. To get rid of the selected favorite click the Remove button at the bottom right. There is also full keyboard support.
Close the Utility panel and your changes are saved automatically. It's so easy to remove favorites now, there's no reason not to add them even if they're only temporary.
Higher Density Backdrops in App Launcher
Despite being a character-mode UI, App Launcher now includes a special character set for showing backdrops with 4 pixels per character cell. The result is options for backdrops that look at lot more graphical than was possible before.
Desktop backdrops can now show 80x50 pixels even on the character-mode screen.
These higher-density backdrops can be rendered or composited on a Mac or PC. Or you can draw your own or edit existing samples using Desktop Designer. Don't forget to download the new backdrop sets from the media packs.
Change CBM File Types
From the File menu in File Manager, you can now open the new CBM File Type Utility. The selected file in the App below is shown in the Utility. Pick a file type, PRG, SEQ or USR, and click Change Type.
It works universally on all drive types, by means of the new ftype library.
The Presenter App, free version, now comes as part of C64 OS
Now that Presenter (Free) is included by default, C64 OS updates come with release notes in Presenter format.
From the About C64 OS Utility, in addition to viewing the version and build numbers, now you can click the "Read Notes" button to open the current version's release notes in Presenter.
Presenter version 1.03 has been updated by PIG Games with bug fixes and new support for convenient keyboard navigation. Slap the space bar to proceed, just like in most conventional C64 demos and game intros, or press ← to stop the presentation.
Release notes from inside C64 OS have never looked so slick.
Making aliases to C64 Software is a snap
Creating aliases to non-C64-OS software is a snap with the PRG Alias Maker Utility that's now included with the system.
Open in File Manager, navigate to where you have some software stored and select the file to load and run. Change the name of the alias to anything you want and click Create. For the majority of software, it's that easy.
PRG aliases can be added to your App Launcher desktops side-by-side with C64 OS Apps and Utilties.
New libraries, new classes, new and updated drivers, and many bug fixes.
Version 1.08 makes solid improvements to speed and usability throughout the system. It lays the foundation for faster and more stable network-oriented Apps. Plus refinements to the user interface throughout the system, including an updated Configure Tool.
Read the complete release notes for v1.08 on the Official Software Updates page.
mouSTer USB Input Adapter - Available Here
C64 OS is controlled with a pointer. For the slickest, fastest and most convenient control over the user interface, you really need a proportional mouse. That's where mouSTer steps in.
mouSTer is an incredibly compact slim adapter, compatible with C64, C64c, C128, VIC-20, plus a plethora of other retro computers if you're into those too. It is fully configurable, and can emulate a 1351 mouse with added bonus of support for the scroll wheel, which is fully integrated into C64 OS.
In addition to being an amazing proptional mouse adapter that's ideal for C64 OS, mouSTer can also be configured for use with any USB joystick or game controller, with configurable buttons and autofire options on any button.
Buy direct from OpCoders Inc. at a competitve price or buy it in a bundle with C64 OS to save even more money. We ship mouSTer pre-configured for use in C64 OS. Plug it in, connect any USB mouse–you can even use a wheel mouse or wireless mouse with a USB dongle–run the Configure Tool and choose the mouSTer driver. That's it!
We even ship mouSTer with a beautiful printed user's guide so you can easily make use of all its options.
Image Search - Released Spring 2025
An amazing new release for C64 OS. Image Search is an internet-powered image search and conversion Application that puts a trillion images just seconds away from your Commodore 64.
This new Application is a free download from the C64 OS Software Releases page. It requires C64 OS v1.07 and a compatible internet connection. If you haven't updated to C64 OS v1.07, download the latest system updates here.
Image Search is packed with features. It makes use of the network stack introduced in C64 OS v1.07, and gives you a search bar to search for images, pictures and graphics. The search results come from the Google Image Search API, and are displayed in a scrolling table with multiple resizable and sortable columns.
In the lower half of the screen you have a set of image adjustment and conversion controls. When you download the image it is pre-processed and converted to C64 image format in the cloud allowing you to access and view graphics whose originals have a huge resolution in JPG, PNG and GIF formats.
Make any of the following adjustments:
- Automatic Crop
- Greyscale
- Invert Colors
- Mirror Horizontal
- Flip Vertical
- Rotate
- Brightness
- Contrast
- Aspect Ratio Correction, and
- Drag a box to zoom in on any area of the image.
Choose any of the following conversion options:
- Dither Type
- Dither Radius
- Colorspace
- Color Palette, and
- C64 Resolution
View graphics in splitscreen or fullscreen, or save them to disk to view and use later.
What's new in v1.07
C64 OS version 1.07 comes with a full networking stack; network hardware drivers, a network configuration Utility, a packet-switching library and an asynchronous socket-based network API.
The new Help Utility teaches you how to use Applications, right from within the App. Secure input fields protect your passwords from prying eyes. Get mega-sized mouse pointers by holding CONTROL when you pick a pointer style. C64 Archiver format gets support for scratching old files. TextView gains support for hyperlinks. File Manager tabs remember their column widths. And new keyboard shortcuts speed up your workflow.
Network Utility
Open the Network Utility from Settings, found in the Utilities menu. Use it to select and configure a driver for your network hardware, specify a Wifi SSID and password, and join a CNP server.
Once set up, the network stack boots up from saved settings and takes you online as soon as you launch any Application or Utility that needs to use the network.
Check out the C64 OS Networking Guide.
Mega Mouse Pointers
Mouse pointers have been refined and new ones are available in the system's pointers directory. Design your own pointers with the new Desktop Designer Application.
From the Mouse Utility, hold CONTROL when clicking on a mouse pointer style to make the mouse pointer mega-sized.
PRG Runner got a boost
PRG Runner is used to launch into regular C64 software from within C64 OS. Now you can use it to run most PRG files directly, without needing to create a PRG alias first.
Run PRGs directly from File Manager
Invoke the PRG Runner directly from the File menu, or with CONTROL+O. Leave the CONTROL key held down to autoboot the program. Fast Reboot into C64 OS with an REU for a slick and speedy experience.
Get help. Right where you need it.
From the updated Utilities menu, open the new Help Utility to learn how to use the Application you're in and discover all its features.
Select the topic from the table of contents in the resizeable sidebar. Help topics are hyperlinked for quick navigation to just what you're looking for.
Browse Over 6M Articles... on your Commodore 64
With the new native Wikipedia client for C64 OS you can browse over 6 million articles and read and learn about nearly anything, right on your Commodore 64.
That's 6 million English articles, but Wikipedia for C64 OS also lets you browse in 5 other languages.
From 2400 baud to 33.6 Kbps, Wikipedia for C64 OS is designed to feel fast, so you spend more time learning and less time loading.
C64 OS's Network Proxy Services make articles designed to be consumed by the Commodore 64; MText documents, native link format, dynamic segmentation with table of contents.
New dev tools, bug fixes and many system-level improvements
Version 1.07 is the biggest system update to date. It has improvements across the board from bug fixes and stability improvements, to new drivers, more hardware compatibility, and new features from the KERNAL to the File Manager.
Read the complete release notes for v1.07 on the Official Software Updates page.
What's new in v1.06
C64 OS version 1.06 adds new Memos and MiniEdit Utilities. Plus a bevy of new features, bug fixes and improvements across the board.
The CAR format v3 adds support for embedded checksums. File Manager, Open and Save Utilities support hidden files on all devices. Copy and Move Utilities show a preview of their destination. Right-click any path bar to show the directory header instead. New larger notes editor in Today, plus a new compact mode, and ways to jump to any date quickly. Collect files into Buckets for playlists and bulk processing. Improved keyboard navigation in File Manager.
And the new Visualizer Application is a fun way to listen to your favorite SID tunes.
Memos
Open the Memos Utility inside any C64 OS Application. Jot down your thoughts. Copy and paste text between Memos and the Application.
Up to 255 pages, or 255-character memos each. Every Application uniquely remembers which page you were on last, letting different Apps helpfully return you to a relevant Memo.
New Support for Hidden Files
Any file that starts with a dot (.) is now considered to be a hidden file. File Manager won't show these items by default. An option under the View menu lets you toggle the visibility of hidden files per tab. Hidden files work the Open and Save Utilities too. Press COMMODORE+H to toggle the visibility of hidden files and subdirectories.
The Memos Utility stores its content in a hidden ".memos" subdirectory of the system directory. You can create your own hidden files and directories for better privacy or just to keep things looking neat and tidy.
Hiding files works on ALL devices: CMD HD, RAMLink, FD2000/4000, SD2IEC, IDE64, 1541, 1571 and 1581, and even in mounted disk images.
Copy and Move with Confidence
Before you start copying or moving files to another tab, you now see a file reference representing the place where those files are about to be sent.
This gives you bit more confidence when you've got multiple tabs each at a different place.
CAR Files Gain Integrity
Installer shows a new Check button for all v3 CAR files.
Simply click the Check button to begin an integrity check. You see the CPU busy clock icon while it works. When its done, a checkmark indicates it has passed the integrity check. A splat (*) indicates that the file is corrupt in some way.
Larger Notes in Today
The Today Utility now has a larger, scrolling, multi-line, text area for notes. The new compact mode lets you hide the notes with a double-click of the title bar.
Notes can be copied and pasted between Memos, Today, and any other text field.
Visualizer and Favorites
Visualizer is a fun new Application where you can listen to your favorite SID tunes while watching a cool visual effect of a wave form.6
The Buckets Utility lets you put files, stored anywhere on any device, into a labeled bucket, such as backups, new, important, favorites, and so on.
A bucket holds a temporary collection upon which other Applications can perform bulk operations.
Visualizer has a drawer on the right that can be dragged open or closed. It lists all the files in the Favorites Bucket, regardless of where they're stored.
Open these files in SID Preview. You can see all the metadata, pick the track and play it back.
SID Preview and Visualizer use the new media control messages in C64 OS v1.06 to keep in sync. When you stop the music in SID Preview, the animation stops. And the menu options can control SID Preview and tell it to start and stop playing.
The Colors Utility lets you customize the upper and lower colors of the wave form animation to enjoy over 100 unique combinations.
Edit Text Files in File Manager
The new MiniEdit Utility gives you a tiny text editor that can be opened within any Application. It automatically opens the currently selected file.7
Drag selections with the mouse; edit using cut, copy and paste; and save your changes without ever leaving File Manager.
It can be used to customize settings files, the Utilities menu, the menus and metdata files of an Application, including its keyboard shortcuts.
Many bug fixes and minor improvements
Version 1.06 includes many more bug fixes and minor improvements throughout the system.
Read the complete release notes for v1.06 on the Official Software Updates page.
Eliza for C64 OS - Released Christmas Eve 2023
A whole new imagining of the classic 1960's "Eliza" chat bot is now available as a C64 OS Application.
Compared to the BASIC version for the Commodore 64, Eliza for C64 OS absolutely flies. Responses come back instantaneously, as the whole engine has been rewritten from scratch in 100% 6502 assembly language.
As a C64 OS Application, Eliza gets all the bells and whistles, including:
- MText formatted conversations
- 4KB Scroll-back chat buffer
- Customizable color theme
- Save and load your conversations
- Preview saved conversations from File Manager
Plus the ability to run Utilities at the same time, including using SID Preview to listen to your choice of SID music while you chat with Eliza.
Eliza for C64 OS comes with 5 personalities: Original, Pirate, Abusive, Neurotic and Robot. Each personality has a custom header logo. Plus, each personality has a unique greeting and a unique way to be insulted and stop talking to you. There are some fun easter eggs to find hidden in the personalities.
Available for purchase for just $1 CAD.
We hope you have fun playing around with this venerable chat bot. And don't forget, in addition to saving the text of your conversations you can also take screenshots of memorable moments to share friends.
Purchase and download here: C64 OS Software Releases
What's new in v1.05
C64 OS version 1.05 brings a major architectural upgrade — Fast App Switching.3
You can configure C64 OS to use from 2 to 30 banks of an REU (if available) for use as fast app switching banks, allowing you to have up to 30 Applications open at the same time. Switch to Apps the same way you always have, but if they're already open, suddenly you switch to the open App instantly.
The Switcher
The new Switcher Utility can be used to see all your currently open Applications. Select an Application to either switch to it or quit or kill it.
Applications can be in different states, either: Running, Frozen or Unsaved. Switcher shows the Apps in the order they were most recently accessed. The Usage section tells you how many 64KB banks an Application is currently using.
You can now drop to the READY prompt from within any Application.
Switcher has been added by default to the bottom of the Utilities menu. Plus it gets the keyboard shortcut of CONTROL+S.
This allows you to quickly open Switcher from within any Application, which lets you switch directly from any current Application to any other open Application.
Fast Reboot
You can now drop to the READY prompt from within any Application. Simply pop open the Switcher and click "Drop to: READY." button. Just like when quitting to BASIC from File Manager you can hold the CONTROL key to remain in the partition and directory of the Application's open file.
From the READY. prompt, you do almost anything,4 including running BASIC or other C64 Software. You can also perform standard file management tasks using BASIC or JiffyDOS commands. When you're ready to return to C64 OS, load and run the C64 OS booter like normal. However, you'll boot abnormally fast, and be returned directly to the Application where you left off.5
The Usage Utility
The Settings Utility now offers to open the new Usage Utility. It's a major update to the older Memory Utility.
Run through the Configure Tool to change which Utility you want to open when you double-click the available memory indicator in the Status bar.
The default option is now Usage, but Memory or Peek are still available.
See every page of main memory, and how it's been allocated by the Application or the system. RAM usage is updated on a periodic timer, choose fast or slow updates to change how quickly the display refreshes.
Click individual pages to select them, and click Peek to open that page to peek into its contents.
This brand new display visualizes the usage of 64KB REU banks, from 128KB to 16MB. It also tells you how much of your REU has been used and how much is still available.
Click on any data bank to see which App bank allocated it. Or vice versa, click any App bank and you'll see what data banks it has allocated. Refreshes are automatic, with two speed settings, or click the Reload button to refresh immediately.
All the way back in C64 OS v1.0, the KERNAL keeps a running tab of the last 10 seconds of CPU usage. It's the same system that triggers the CPU busy indicator in the menu bar.
But for the first time, you can now visualize this CPU usage information with an animated and colorful bar graph.
Updated About This App
About This App was one of the first Utilities to be written. It's been rewritten and given a nice facelift by being entirely implemented with a Toolkit UI.
Application bundles collect settings and configuration of the App itself as well as Utilities that you run with that App. Click the Reset button to clear out this temporary data and restore an App bundle to its virgin state.
New Keyboard Shortcuts
To help out with Fast App Switching, several new keyboard shortcuts have been added. Hold COMMODORE+CONTROL+SHIFT while booting to prevent fast reboot and force a fresh clean boot with all Applications expunged from the REU.
Hold LEFT-SHIFT while switching to an Application that is already open to force its REU bank to be expunged and for it to be cleanly reloaded from storage.
Press CONTROL+R in the Save and Open Utilities to refresh the directory listing. This is useful because you can no fast switch back to File Manager, make changes there, and then fast switch back to the App with the Save or Open Utility already running.
Read the complete release notes for v1.05 on the Official Software Updates page.
What's new in v1.04
C64 OS Software updates add great new features: Support for Mouse Wheel; Mount .D64, .D71, .D81 and .DNP Images in File Manager1; Listen to SID Music; View new Commodore Grafix (CGFX) files including 3D-models, panoramic scenes, and short animation sequences2; Customize boot options in different modes; Access the native file system through VICE in File Manager; and much more.
CGFX: Animations and 3D Models
Put your REU to new use. Explore a new class of media with interactive 3D models, in the new Commodore Grafix file format, and C64 OS Image Viewer.
Watch the video preview.
The new Commodore Grafix format supports 3D models, panoramas, and animation sequences with variable framerate up to 256 frames. Animations support looping, bouncing and loop count.
Watch the video preview.
SID Preview Utility
C64 OS now includes the SID Preview Utility. You can open SIDs in PSID format with a double-click from File Manager.
The SID Search Service lets you find and download from over 34,000 SIDs from HVSC that have been relocated for guaranteed compatibility with C64 OS. It's a first on the C64 that lets you listen to HVSC SID music from inside other Applications.
Search SID ServiceSupport for All Native Video Modes
The C64 OS gfx.lib now supports character-mode graphics. Image viewer can display PETSCII graphics, like this collection of hundreds of cute PETSCII BOTS.
Screenshots now capture the custom character set, and can be viewed in their original fidelity from inside C64 OS.
Save any HiRes or MultiColor bitmap frame from a CGFX animation or 3D Model or any other image file format as a custom boot screen graphic.
Some image matrices make the perfect candidates for both a looping animation sequence, and an interactive model. Pause the playback and you can freely rotate the object in either direction.
Watch the video preview.
You can create your own Commodore Grafix panoramas, animations and 3D models using a series of frames and the CGFX Creator Tool to bundle them into a RIFF/CGFX container.
Watch the video preview.
New Utilities, New Capabilities
Below are some new and updated Utilities. Enjoy SID tunes from within any other Application using SID Preview. Customize how the scroll wheel works with new Mouse settings. Mount disk images to copy files into and out of them with File Manager. Validate the integrity of downloaded files with Checksum.
These are just some of the new features in v1.04, which join the brilliant capabilities that C64 OS already offers you. Along with many bug fixes, stability improvements, improved support for IDE64, support for VICE FS, new features for TurboChameleon64, and usability improvements in existing Apps and Utilities across the board.
Read the complete release notes for v1.04 on the Official Software Updates page.
Install software updates for free
Amazing new features are becoming available for C64 OS all the time, and the ability to install them was designed to be a snap right from the very beginning. You can find the system updates on the Official Software Updates page.
Updates come in CARs. Why? Because CARs are great for transporting things. Pick the update that's right for your current version and copy it over to any device that C64 OS has access to. Double-click the CAR file in File Manager and the Installer Utility does the rest.
- The wave form is simulated from a pre-generated random pattern.
- MiniEdit will only open SEQ-type files, up to a maximum of 1 disk block.
- Fast App Switching requires a 17xx-compatible REU. Compatible with Ultimate64, Turbo Chameleon 64, 1541 Ultimate II+, RAD, VICE, etc.
- After dropping to the READY. prompt, do not run C64 software that uses the REU. Any regular C64 software that modifies the contents of the REU will disrupt C64 OS, its Applications and their data.
- Fast Reboot requires a 17xx-compatible REU. Compatible with Ultimate64, Turbo Chameleon 64, 1541 Ultimate II+, RAD, VICE, etc.
- SD2IEC device is required to mount disk images.
- To view multi-frame images and animations requires a 17xx-compatible REU is required. Compatible with Ultimate64, TurboChameleon64, 1541 Ultimate II+, RAD, VICE, etc.
Last modified: Aug 08, 2025