DDOS is a floppy disc operating system from the German company Dobbertin Industrie Electronic. DDOS is delivered as a 16 KB EPROM with a lot of software and a manual.
DDOS can be used as a rom 7 replacement.
DDOS has the ROM name 'CPM ROM' but shows a sign-on message of "DDOS 2.00 (C)1988 Dobbertin GmbH"
RSX commands
(same operation as AMSDOS): |A, |B, |CPM, |DISC, |DISC.IN, |DISC.OUT, |TAPE, |TAPE.IN, |TAPE.OUT, |DRIVE, |USER, |ERA, |REN
(same operation as VDOS): |ATTRIBUT, |CAS, |CAS.IN, |CAS.OUT, |FORMAT, |SLOW, |FAST, |ROMOFF
DDOS extras: |S, |S1, |S2, |DOSOFF, |SYSCOPY, |TYPE, |HELP
|HELP,<number> - display list of RSX commands for the given rom <number>