This "All In One" Public Domain ROM chip(PDrom for short) is a universal ROM with 24/28 Pins primarily for 8-bit systems. The ROM chip is configured via the built-in USB-C port using a web interface.
Additionally, there is an SD card slot on the chip, where files can be loaded.
By using pin 1 of the ROM chip, it is possible to switch between different ROMs either between two ROMs using a switch, or between up to 16 ROMs using a pushbutton (or switch: on/off x times).
For the C64 it exist a "Boot Menu" Option you can activate in the Web Tool. If you press and hold the Commodore key while Power Up your C64, then you will enter the PDrom Config Menu. With the config menu you can switch the kernel and also load files into the C64 (PRG, P00, T64, SID).
With the web tool, it is possible to connect to the PDrom, manage ROM files, and fill and organize the SD card with data.
Web-Tool: > Link
The PDrom comes pre-soldered and is delivered ready for immediate plug-and-play use
The following EPROM types are supported:
24-pin
2316 (2 KB, Commodore)
2332 (4 KB, Commodore)
2364 (8 KB, Commodore)
2716 (2 KB)
2732 (4 KB)
28-pin Mask ROM (23xx)
23128 (16 KB)
23256 (32 KB)
23512 (64 KB)
28-pin EPROM (27xx)
2764 (8 KB)
27128 (16 KB)
27256 (32 KB)
27512 (64 KB)
28-pin EEPROM (AT)
AT28C64 (8 KB)
AT27C128 (16 KB)
AT28C256 (32 KB)
28-pin EEPROM (W)
W27C512 (64 KB)
Note on availability: "To ensure the high quality of this public domain project, the source codes and hardware designs are currently still being prepared and finalized for release. Full access to the data will be made available to the public (and thus to all buyers) free of charge over the course of 2026 (as usual on the Wiki page). The hardware is, of course, already fully operational."
Manufacturer and Safety Information
Manufacturer InformationDipl. Inf.(FH) Matthias Lorenz
c/o Online-Impressum.de
Europaring 90
53757 Sankt Augustin
www.uni64.com
E-Mail: webshop@uni64.com
WEEE-Number: DE94821459
Responsible Person for the EU
See manufacturer information
Product type: Electronic assembly (finished module).
Product IdentificationProduct: Public Domain ROM (PDrom)
Art.-No.: 7556
This product must not be disposed of with household waste. Please hand it in at a municipal collection point.
Safety Instructions:- This product is a technical component and not suitable for children.
- Approved only for operation with safety extra-low voltage (max. 12V DC).
- The component does not have its own housing. To prevent short circuits and signal interference, operation on conductive surfaces is prohibited and suitable shielding is required.
- Installation and commissioning only by qualified personnel.
Orderable (delivery in 5 weeks)