How the Very First C64 Freezer Worked: The Story & Tech of ISEPIC
By NewsHound ·
darkuni details the first C64 freezer, the ISEPIC cartridge.

The new video examines ISEPIC, the earliest freezer cartridge for the Commodore 64. It places the device in context, noting that it predates later tools such as Action Replay, Super Snapshot and The Final Cartridge. The host, Shane, outlines the hardware design and operational quirks of the original ISEPIC.
A full demonstration of the cartridge is included, showing how it captures and restores program state. The walkthrough details the technical steps involved in using the freezer.
The presentation highlights ISEPIC's influence on subsequent C64 development tools and its role in the evolution of freezer cartridges. While the term "freezer" also describes ultra-low-temperature scientific equipment, the ISEPIC serves a distinct purpose in retro computing.
Check out the full ISEPIC deep dive on darkuni now: