RDOS is a DOS expansion, programmed by the german software company Dobbertin. It provides a 444 KB RAM disc under BASIC, CP/M 2.2 and CP/M Plus. From BASIC the RAM disc can be accessed by the RSX command |C. After selecting RAM drive C all usual commands like LOAD, RUN, SAVE, ERA, REN etc. can be used.
RDOS is compatible to all other DOS except BonnyDOS.