FutureOS Cartridge provides the OS FutureOS in its version for the 6128 Plus. At the moment it's only available in German language, but others can be added if enough persons are interested.
When inserting the FutureOS cartridge in the Cartridge port of the 6128 Plus (or an Plus capable emulator) the OS boots immediately.
The 6128 Plus version of FutureOS uses features of the ASIC like hardware sprites f.e.