Ultra36

One system, your ROM collection

Ultra36 is designed for the C128 internal function-ROM socket and supports either eight or sixteen 32KB banks. Its dedicated menu ROM provides quick bank selection alongside useful C128 system information and controls. Note that on some models you may need to cut or remove the metal shielding around the U36 Socket. If you remove the shielding please add heatsinks instead, note that Ultra36 does not need one.

Why Ultra36?

• No soldering or case modifications: Ultra36 requires no soldering inside the Commodore 128 and no drilling into its case.
• Store up to 14 ROM images inside your C128, providing up to 448KB of selectable Function ROMs.
• Return your C128 to stock operation at any time: simply select the Empty Bank.
• Keep multiple diagnostic ROMs ready to use, without swapping cartridges or chips.
• Store multiple StartApp ROMs and select the one you need from the menu.
• Switch freely between the GEOS 1571 and GEOS 1581 loaders.
• Control JiffyDOS directly from the menu, alongside your internal Function ROM selection.
• Build your multi-ROM image online; the menu program automatically uses the names entered in the online builder.
• Update the microcontroller firmware at any time, allowing Ultra36 to receive future improvements and new features.
• The User Port adapter is only required for communication. Select the Empty Bank or any Function ROM, then unplug the Ultra36 User Port adapter; your selection is remembered and remains active.