Some of the best known RSX commands are the ones provided by AMSDOS, as they were present on all CPC664, CPC6128, 6128plus and CPC464 with DDI-1:
|A<br>
Makes drive A: the current work drive
|B<br>
Makes drive B: the current work drive
|CPM<br>
Starts CP/M (or other systems) from a system disk
|DISC<br>
Switches back to disk drive use after |TAPE
|TAPE<br>
Makes the CPC use the tape recorder for file access
RSX command extensions can be implemented through ROMs (like AMSDOS or other disk operating systems) or by programs.