X-DDOS is a disc and hard disc operating system from the german company Dobbertin Industrie Electronic. It provides 0.7 MB floppy disc formats for B drives and allows to access the [[Dobbertin Harddisc]] HD20. X-DDOS is delivered as a 16 KB EPROMwith a lot of software and a manual.
== Floppy Discs ==
== Hard Disc HD 20 ==
The Further XD-DOS 2.0 and 2.10 support the [[Dobbertin Harddisc|HD-20]] hard disc drive. The hard disc HD20 consists of four partitions with 5120 KB each. X-DDOS allows the access to this 5 MB partitions by using the drive letters D, E, F and G. The integration of X-DDOS allows to load some games and demos from hard disc. Also CP/M and CP/M Plus can be booted from hard disc.
== Downloads ==
* [[Media:Xddos111.zip| X-DDOS 1.11 ROM]]
* [[Media:X-DDOS20.ZIP|X-DDOS v2.0 (zipped ROM file)]]
* [[Media:XDDOS210.ROM| X-DDOS 2.10 ROM]]
[[Category:Disc Operating System]] [[Category:Expansion ROM]]