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|Info:||There are different versions|
RR-Net is a 10MBit network card originally designed to be used on the clockport of a carrier card like the Retro Replay, MMC64, MMC Replay but from the Mk3 version you can also plug it directly in the expansion port of the C64.
Using the RR-Net MK3 as a cartridge without carrier card does not work with C128, SX-64 and very old C64 mainboard versions.
Networking software supporting RR-Net