If you’ve ever wished your Commodore 64 could output crystal-clear video through a modern HDMI port, Jan Beta’s latest video may just blow your retro-loving mind. In this episode, he tests the ISEVIC—a cartridge-based module that delivers native HDMI for C64. Developed by Bloodmosher, this open-source project uses a Tang Nano FPGA board to convert the C64’s video signals into a beautiful 720p HDMI output. And it works without removing your VIC-II chip.
While early in development, the ISEVIC already offers a practical solution for those seeking native HDMI for C64 systems without committing to irreversible mods. In this listicle, we break down what makes this device so impressive.
1. Plug-and-Play HDMI Output
One of the ISEVIC’s most appealing features is its simplicity. You plug it into your C64’s cartridge port, connect three clips to the CPU legs, and boom—HDMI video. Even without the CPU clips, it displays the BASIC screen flawlessly. Once the pins are connected, gameplay video becomes glitch-free, even with more demanding software.
2. Powered by FPGA Brilliance
At the heart of the ISEVIC is a Tang Nano 20K FPGA. This board emulates the VIC-II’s behavior in real-time, delivering crisp video and even a form of SID sound emulation. Jan points out that while it’s software-based and not quite 8580 accurate, it’s more than passable for casual gaming.
3. 1280×720 Resolution on Real Hardware
The output resolution is 720p—perfect for most modern monitors and capture cards. It’s not just a blurry upscale either. The signal is sharp, the colors are vibrant, and Jan confirms there’s virtually no input lag—making it great for real-time gameplay and streaming.
4. Cartridge Pass-Through Compatibility
Unlike some expansions, ISEVIC includes a pass-through so you can still use your Kung Fu Flash, 1541 Ultimate II+, or BackBit cartridges. Most are confirmed to work fine. Some minor graphics glitches were noted, likely due to early firmware or regional (PAL vs NTSC) differences.
5. Open Source and DIY-Friendly
Everything—from schematics to firmware—is openly available on GitHub. Bloodmosher has made it clear: this project is for the community. If you can solder and have access to a PCB printer or assembly service, you can build one yourself today.
6. Bonus Feature: Clock Calibration
The ISEVIC also provides tools to adjust your C64’s VIC-II clock for perfect timing. Jan demonstrates how to fine-tune it with a trimmer capacitor to eliminate skipped frames and stutter—something that helps even composite video users.
7. Real World Testing Success
Jan Beta throws everything at the ISEVIC: River Raid, demos, Kung Fu Flash, and SID playback. While a few edge-case issues crop up, most content runs beautifully. The scrolling is smooth, the output stable, and the SID emulation decent enough for casual play.
Conclusion
The ISEVIC delivers what many C64 fans have long wanted: true HDMI output with minimal hassle. While still in its early stages, it’s already a major step forward for preserving and enjoying the C64 on modern displays. With the native HDMI for C64 solution now in the wild, the future of pixel-perfect retro gaming looks very bright.
