Biretz

Biretz, often encountered in online forums and discussions related to vintage computing, particularly in the context of the Commodore 64 and other 8-bit systems, refers to a specific type of modified ROM cartridge. These cartridges typically contain multiple software programs (games, demos, or utilities) selectable through an on-screen menu. The "Biretz" name is strongly associated with the individual(s) who popularized or initially created these multi-carts, often attributed to a specific hacker or small group within the Commodore scene.

The defining feature of a Biretz cartridge is its ability to circumvent the limitations of a standard single-program cartridge by storing and loading multiple programs directly into the computer's memory. Users can then choose which program to run via a menu-driven interface displayed on the screen upon booting the machine.

These cartridges were commonly created using EPROMs (Erasable Programmable Read-Only Memory) that were larger in capacity than the standard ROM chips found in commercial cartridges. This enabled the storage of multiple program images. A custom-designed circuit board and menu software were also necessary to facilitate the program selection process.

Biretz cartridges became popular among enthusiasts for several reasons:

• Convenience: They allowed users to access multiple programs without needing to swap physical cartridges.
• Preservation: They provided a way to archive and preserve collections of software.
• Modding Culture: They represented a form of hardware and software modification within the vintage computing community.

While the exact technical details of the manufacturing process could vary, the underlying concept remained consistent: a multi-program cartridge offering a convenient menu-driven selection interface. The term "Biretz" has become a generally recognized term within the Commodore community for this type of multi-cart, often carrying a connotation of quality and reliability due to the original association with the skilled hacker(s) who pioneered the concept.