Ultimate64 Manager

A cross-platform desktop application for managing Commodore 64 Ultimate, Ultimate 64, Ultimate 64 Elite, and Ultimate-II+ devices. Browse files, mount disk images, stream VIC video/audio, play SID music, and edit device configuration.

Downloads

Prebuilt binaries for macOS, Windows, and Linux (AppImage) are available on the GitHub Releases page: https://github.com/sandlbn/ultimate64-manager/releases

Required: Enable the following services in the Ultimate / Commodore menu (not in this app): Web Remote Control, FTP File Service, Ultimate DMA Service, and Ultimate Ident.
If these services are disabled, Ultimate64 Manager will not be able to connect.

Features

• Dual-Pane File Browser – Local and remote file browsing side by side
• FTP File Transfer – Upload/download files via FTP with multi-file selection
• Remote Directory Browser – Browse the Ultimate filesystem without mounting disks
• Disk Image Viewer – Display D64/D71 directory contents (C64-style listing)
• Disk Management – Mount D64, D71, D81, G64, G71, G81 images to Drive A/B
• Run Programs – Direct load and run for PRG, CRT, and SID files (PRG files also offer Load without running)
• Game Mode – A full-screen list for browsing and running game collections
  • Reads game folders on the device (FTP) or on local disk, configured in Settings (or add the current device folder with 🎮+)
  • Handles common collection layouts: flat files, letter buckets, one-folder-per-game, and nested folders
  • Shows a folder's box art and screenshot when present, including a central art folder such as OneLoad64's Extras/Images
  • A–Z jump, keyboard navigation, and Run (local games are uploaded to the device first)
  • Caches the scanned list and re-scans on change or via Refresh; Fullscreen hides the app chrome
  • ▶️ Video walkthrough · see GAME_MODE.md for setup, including preparing a OneLoad64 collection
• Supported File Types – D64, D71, D81, G64, G71, G81, PRG, P00, CRT, SID, MOD, XM, S3M, TAP, T64, REU, ROM, BIN, CFG, ZIP, and firmware updates (U2L, U2P, U2R, U64, UE2)
• Music Player – Play SID and MOD files with playlist support
  • Shuffle and repeat modes
  • Subsong navigation for multi-tune SID files
  • Song length database support (HVSC Songlengths.md5)
  • True pause/resume (freezes C64)
  • Configurable default song duration
  • "Up Next" queue strip showing the next tracks in play order (honors shuffle)
  • Import/export M3U/PLS playlists (relative paths resolved, duplicates skipped)
• Video Streaming – Real-time VIC video with audio
  • Fullscreen mode (double-click or Opt+F / Alt+F)
  • Screenshot capture to Pictures folder
  • Unicast and multicast support
• Audio Streaming – SID audio output via UDP
• Memory Editor – Read and write C64 memory in real-time
  • Quick access to common locations (Screen, VIC-II, SID, CIA, Zero Page, etc.)
  • Hex, ASCII, Decimal, Binary display modes
  • Search for byte patterns or ASCII text
  • Fill memory ranges
  • Click-to-edit bytes
• Configuration Editor – Edit Ultimate configuration settings
• Device Discovery – Automatic network discovery of Ultimate devices
• Backup & Restore – Full configuration backup and restore
• Machine Control – Pause, Resume, Reset, Reboot, Power Off
• Remote Keyboard Input – For BASIC only
• Device tab – Low-level device capabilities in one place
  • Live drive-type switching (1541 / 1571 / 1581), drive power on/off, and drive reset for Drive A/B
  • Keyboard/text injection – feeds text into the KERNAL keyboard buffer ($0277) and presses RETURN. Works at the BASIC prompt and programs that read via the KERNAL (GETIN/CHRIN); not games that scan the keyboard matrix ($DC00) directly
  • Debug register $D7FF read/write (U64 only)
  • Debug bus-trace stream capture (U64 only) – records the cycle-accurate 6510/VIC/1541 stream to a raw .bin for the documented GtkWave/VCD converter
• Assembly64 Browser – Search the Assembly64 API (aggregates CSDB, HVSC, c64.org, OneLoad64, Gamebase64 and more)
  • Filter by type, source, rating, recency, and sort order — no AQL knowledge required
  • Save named searches and star favorites for one-click recall
  • View release details with screenshot preview (CSDB-sourced entries) and file listings
  • Run PRG, CRT, SID, and disk images directly on the device
  • Mount disk images with drive (8/9) and mode (RO/RW) selection
  • Extract ZIPs and run/mount their contents
  • Open original CSDB release pages in the browser for scene comments
• BASIC Editor – Write, validate, and run C64 BASIC v2 programs from inside the app
  • Syntax highlighting (line numbers · keywords · strings · REM · PETSCII codes)
  • Validate before send — catches unbalanced quotes, descending line numbers, unknown control codes
  • petcat-style PETSCII control codes ({CLR}, {RVS ON}, {$93}, …)
  • Save tokenized .prg or load .bas text files
  • One-click "Send & Run" with cancel button for in-flight transfers
• Drag & Drop – Drop any file onto the app window for a quick action dialog
  • PRG/CRT/SID → Run on device · D64/D71/… → Mount on Drive A · BAS/TXT → Open in BASIC editor · anything → Upload to remote
• Folder Favorites – Star folders in the local and remote file browsers
  • Toolbar dropdown jumps to a saved path; right-click for an inline context menu
  • Right-click a file → "Reveal in Finder/Explorer" (macOS / Windows / Linux)
• Editable path field – Cmd/Ctrl+L focuses the path; type a path and press Enter to jump there. ~ expands to home on the local pane.
• In-app Help overlay – Press ? from any tab to see every keybind in one place.

Keyboard Shortcuts

Global

Shortcut	Action
?	Show keyboard shortcut overlay
Opt+F / Alt+F	Toggle video fullscreen
ESC	Close overlays / exit fullscreen / clear quick search
Cmd/Ctrl+Z / Cmd/Ctrl+Shift+Z	Memory editor undo / redo

File Browser (Total Commander-style)

Shortcut	Action
F2	Rename selected file
F3	View file contents
F4	Edit selected file in OS default editor (local pane)
F5	Copy across panes
F7	Make new folder
F8	Delete selected
Cmd/Ctrl+R	Refresh active pane
Tab	Switch active pane
Backspace / Cmd/Ctrl+← / Cmd/Ctrl+↑	Go to parent folder
↑ / ↓	Move file cursor
Enter	Open folder · Run PRG/CRT/SID · Mount disk image
Space	Calculate folder size + toggle selection (local pane)
Cmd/Ctrl+L	Focus the path field (type a path, press Enter to navigate)
a–z, 0–9	Quick search — type to jump to first matching file
Cmd/Ctrl+A	Select all in active pane

Game Mode

Shortcut	Action
↑ / ↓	Move selection
a–z, 0–9	Jump to that letter section
Enter	Run the selected game
Esc	Exit fullscreen, then exit Game Mode

Song Length Database

The music player can use the HVSC Songlengths.md5 database for accurate song durations. You can download it from the Music Player tab or place it manually at:

• Windows: %APPDATA%\ultimate64-manager\Songlengths.md5
• macOS: ~/Library/Application Support/ultimate64-manager/Songlengths.md5
• Linux: ~/.config/ultimate64-manager/Songlengths.md5

Screenshots

Screenshots are saved to:

• Windows: Pictures\Ultimate64\
• macOS: ~/Pictures/Ultimate64/
• Linux: ~/Pictures/Ultimate64/

Building

Prerequisites

• Rust 1.81+
• Linux (audio support required for streaming):

sudo apt-get update && sudo apt-get install -y libasound2-dev

• For macOS bundle:

cargo install cargo-bundle

Build

# Clone
git clone https://github.com/sandlbn/ultimate64-manager.git
cd ultimate64-manager

# Build
cargo build --release

# macOS bundle
cargo bundle --release

Enabling Video & Audio Streaming

Streaming requires a wired Ethernet connection. Wi-Fi is not supported.

License

MIT License

Acknowledgments

• Big thanks to Adam Kazmierski (ExploraArt) for many ideas and testing
• Ultimate64 team
• Ultimate64 Rust Library
• Fredrik Åberg for opening up the Assembly64 API