The MasterAdapter available for sale here is an authentic reproduction of the Schnelder Systems MasterAdapter created in the early 1990's.  This device allowed the simultaneous use of the TurboMaster CPU and an REU.

This device has been fully tested and proven to function with a stock TurboMaster CPU and original Berkley Softworks 512K GEOram cartridge operating under the GEOS 2.0r operating system on a stock Commodore 64 computer.  Other variations have not been tested and cannot be guaranteed.

At this time, REU functionality is not supported in this version of the MasterAdapter available for sale here, only GEOram.

The original design concept for this interface was to allow the user to use either a Commodore REU (ie: 1764 Commodore Ram Expansion Unit) or the GEOram cartridge from Berkley Softworks.  Out of the gate, the original GEOram cartridge worked fine, however during Schnedler Systems development, considerable problems were encountered during the development process to get the Commodore REU to function correctly.  Subsequent to the re-creation of the MasterAdapter, I have tested this device with the NEOram open source GEOram cartridge does  appear to be compatible with the MasterAdapter.

At the end of Schnedler Systems involvement in Commodore technology, the MasterAdapter project was abandoned before development had been completed.  

All of the remaining information that exists for this device (including the final driver diskette that was created for the MasterAdapter) can be found in the files section for this item.  Please feel free to download any of the files you would like.

An instruction manual has been created to assist you in the deployment of your MasterAdapter, and can also be found in the files section for this item.

Master Adapter for exclusive use with Schnedler Systems TurboMaster CPU

  • Product Code: MasterAdapter
  • Availability: Out Of Stock
  • $157.45

  • Ex Tax: $149.95

Available Filament Colors

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Natural Translucent
Pine Green
Brown (Dark Chocolate)
Green (Dark Translucent)
Peak Green
Blue (Dark Translucent)
Light Blue
Glow in the Dark Blue