Disk2easyflash -

If you’ve been living under a PET, EasyFlash is a cartridge for the C64 that acts like a Swiss Army knife for ROMs. Usually, you load .CRT files onto an SD card and play. But what about all those disk-based games that never got a cartridge release? You know, the ones that load custom fast-loaders, have 20-level passwords, or weird save systems?

You can’t just drop a .D64 file onto an EasyFlash and press play. Or can you?

Open your terminal/command prompt. Navigate to your folder containing the .d64 and disk2easyflash.py.

The basic syntax is:

python disk2easyflash.py game.d64 game.crt

However, for best results, you need flags. Many games require basic disk swaps. If your game has multiple files (e.g., "PROGRAM", "LEVELS", "DATA"), use the -c flag:

python disk2easyflash.py -c "PROGRAM,LEVELS,DATA" game.d64 game.crt

If the game has a custom loader (like Ocean Loader 4 or Rob Hubbard music routines), use the -f (force) flag:

python disk2easyflash.py -f -s 5 game.d64 game.crt

(The -s 5 adjusts the loading speed sensitivity for stubborn titles.)

Convert classic C64 disk software into fast-loading, cartridge-ready EasyFlash images with Disk2EasyFlash—perfect for collectors and multicart creators who want instant access to vintage games and demos on real hardware or emulators.

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Unlocking the Commodore 64: A Guide to Disk2EasyFlash Disk2EasyFlash is a specialized utility designed to convert Commodore 64 (C64) disk images (typically .D64 format) into EasyFlash cartridge images (.CRT). By transforming standard disk-based software into a cartridge format, users can enjoy near-instant loading times and eliminate the need for manual disk swapping on real hardware or emulators like VICE. Core Functionality and Compatibility

The tool works by redirecting standard disk traffic to the cartridge's memory banks.

The "LOAD" Requirement: It is critical to note that Disk2EasyFlash primarily supports programs that use standard ROM Kernal LOAD routines.

Incompatibility: Software that utilizes custom fast-loaders or direct hardware access to the 1541 disk drive will generally not work with this utility.

Success Rate: Estimates suggest that roughly 4% of single-disk games and 2% of multi-disk games are compatible with the original version of this conversion process. Evolution: Disk2EasyFlash v1.0 (Unofficial)

In 2026, an unofficial "v1.0" enhancement was released by MilaSoft64, building on the original logic by Alex Kazik. This version introduced several highly requested features:

Multi-Disk Support: Users can now bundle up to 26 disk images into a single .CRT image.

Custom Bootloader: The tool includes a bootloader where each disk is assigned a letter (A–Z) for easy selection upon startup.

Memory Mapping: It supports Normal (nm), Low (lo), and High (hi) memory mapping modes to improve compatibility with various software. disk2easyflash

GUI and Python Versions: While the core tool runs via command line, the update includes a Windows menu-driven creator and a Python version for cross-platform use. How to Use Disk2EasyFlash

For those using the Windows executable (v1.0), the process is straightforward:

Preparation: Place the disk2easyflash.exe file in the same folder as your .D64 disk images.

Creation: Run the .exe without parameters to use the menu-driven system, or use the command line: disk2easyflash.exe --crt game_name.d64 output.crt.

Flashing: Once you have the .CRT file, it can be written to a real EasyFlash cartridge using EasyProg on a C64 or transferred via USB to an EasyFlash 3 using EasyTransfer. Key Resources Original Source Code: Available on Alex Kazik's GitHub.

Enhanced Version: Found on the MilaSoft64 GitHub repository.

Community Collections: Large archives of pre-converted games (e.g., 428 games in one collection) can often be found on community forums like Forum64.de.

alexkazik/disk2easyflash: A tool to convert c64 disk ... - GitHub

Disk2EasyFlash is a specialized utility for the Commodore 64 (C64) that allows users to convert standard disk images into a single cartridge image format (.CRT) compatible with EasyFlash hardware. Core Functionality

The primary purpose of the tool is to consolidate multiple floppy disk images onto a high-capacity flash cartridge, eliminating the need for slow physical disk drives or manual disk swapping during gameplay.

Multi-Disk Support: It can pack up to 26 disk images onto a single 1MB cartridge image.

Dynamic Boot Menu: The utility automatically generates a custom bootloader. When the C64 starts, it displays a menu where each disk is assigned a letter (A–Z). Users simply press the corresponding key to mount and "boot" that specific disk image. Format Compatibility:

Supports standard .d64 files (including extended 40-track versions). Compatible with .d81 and .m2i image formats.

Memory Mapping: It includes "intelligent memory stubs" that handle different memory mapping modes (Normal, Low, and High) to ensure software runs correctly from the cartridge space. Role in the C64 Ecosystem

While other tools like EasyProg are used to physically write data to the cartridge's flash memory, Disk2EasyFlash focuses on the creation and organization of the image itself. It is particularly popular for creating multi-disk game collections, allowing classic multi-load titles to run with near-instant loading times.

milasoft64/Disk2Easyflash-v1: Unofficial version 1.0 ... - GitHub

Disk2EasyFlash is a specialized utility designed for the Commodore 64 (C64) community that converts standard disk images (such as .d64, .d81, and .m2i) into cartridge images (.crt) specifically for the EasyFlash hardware. If you’ve been living under a PET, EasyFlash

By bridging the gap between aging magnetic media and modern flash-based cartridges, this tool allows C64 enthusiasts to enjoy their favorite disk-based games with near-instant loading times and without the need for physical disk swaps. The Role of Disk2EasyFlash in C64 Retro-Computing

The EasyFlash cartridge is an open-source, writable 1MB storage device for the Commodore 64. While the hardware itself is powerful, software originally written for floppy disks cannot run directly from a cartridge without modification. Disk2EasyFlash automates this conversion by "patching" the software's loading routines. Core Functionality

Multi-Disk Support: Modern unofficial versions (like milasoft64's v1.0) allow users to bundle up to 26 disk images into a single 1MB cartridge image.

Dynamic Boot Menu: The tool automatically generates a PETSCII-compatible boot menu. Upon starting the C64, users can press a corresponding key (A–Z) to "mount" and boot a specific disk image.

Kernal Hooking: The utility works by hooking into the C64's Kernal ROM vectors. It redirects standard disk traffic (commands like LOAD) away from the serial port and toward the data stored in the cartridge banks. Technical Compatibility and Limitations

Despite its utility, Disk2EasyFlash is not a universal solution for every C64 disk. Its success is heavily dependent on how the original software was programmed.

Standard Loaders Only: The tool strictly supports software that uses the standard ROM Kernal LOAD routines. It is fundamentally incompatible with games that use custom fast-loaders or those that attempt to access the 1541 disk drive hardware directly.

Compatibility Success Rate: Because many classic C64 games used aggressive fast-loaders or "cracked" versions with custom intros, the success rate for automated conversion is relatively low—roughly 4% for single-disk games and 2% for multi-disk sets.

Storage Constraints: The EasyFlash format is limited to 64 banks of 16KB (1MB total). Large multi-disk compilations may exceed this capacity if not managed carefully. How to Use Disk2EasyFlash

The tool is primarily a PC-based utility (Windows/Linux) that produces a .crt file for transfer to the real hardware.

GUI & Command Line: Many versions, such as the Disk2EasyFlash unofficial v1.0, offer a menu-driven Windows .exe for ease of use, though it can still be operated via the command prompt for batch processing.

Creating the Image: You typically place your target disk images in the same folder as the executable. Running a command like disk2easyflash.exe --crt game.d64 game.crt will compile the disk into a cartridge format.

Flashing the Hardware: Once the .crt file is created, it is written to the EasyFlash cartridge using EasyProg on the Commodore 64 or via USB using tools like EasyTransfer. Finding Compatible Games

Due to the low automated conversion success rate, community members often share pre-converted "collections." Enthusiasts have manually tested and compiled hundreds of compatible titles, often found on forums like Lemon64 or CSDb. Are you planning to convert a specific multi-disk game, or

milasoft64/Disk2Easyflash-v1: Unofficial version 1.0 ... - GitHub

Converting Old Disks to EasyFlash: A Step-by-Step Guide

Are you tired of your old Commodore 64 disks being incompatible with modern devices? Do you want to breathe new life into your vintage games and demos? Look no means of disk2easyflash, a tool that allows you to convert your old Commodore 64 disks to EasyFlash format. However, for best results, you need flags

What is EasyFlash?

EasyFlash is a modern solution for loading Commodore 64 software, allowing users to store and load programs using an SD card or USB device. This innovative technology makes it easy to preserve and play back your favorite C64 games and demos.

What is disk2easyflash?

disk2easyflash is a utility that enables you to convert your old Commodore 64 disks to EasyFlash format. This means you can transfer your existing disk collection to a digital format, making it easy to access and play on your C64 using an EasyFlash device.

Benefits of Using disk2easyflash

Step-by-Step Guide

Now you have a .crt file (e.g., last_ninja.crt). You need to get this onto your physical EasyFlash 3 cartridge. There are two ways:

Pro Tip: Always flash the "Internal" memory on the EasyFlash 3. The "Dual" mode is for custom demos.

Disk2EasyFlash is a tool for converting vintage Commodore disk images (D64, G64, etc.) into EasyFlash-compatible ROM images so they can run on modern EasyFlash-equipped Commodore 64 hardware or emulators. Below is a concise, user-facing post you can publish or adapt.

You do not actually have to run the command line. The C64 community has already done the heavy lifting for you.

The OneLoad64 Collection is a curated set of over 1,700 Commodore 64 games, all converted to EasyFlash CRT format using—you guessed it—disk2easyflash and similar tools. If you want a "download, copy to SD card, and play" experience, skip the conversion and download the OneLoad64 gamebase.

However, for obscure homebrew titles or rare European budget games, disk2easyflash remains the only solution.

You do not need to be a coder to use disk2easyflash, but understanding the "how" helps you troubleshoot.

A standard disk game for the C64 relies on the KERNAL (Kernel) operating system to load data. The drive sends bytes over a serial cable (the IEC bus). Disk2easyflash performs three distinct operations:

The floppy disk was never meant to last forever. It was a temporary envelope. Your machine, your data, and your operation were meant to last.

Stop chasing obsolete drives on eBay. Stop praying to the gods of magnetic decay.

Disk2EasyFlash. Read the past. Write the future. Boot the present.