||[[ROMDOS|Rom DOS XL v4.88]]||1993||[[Siren_Software|Siren Software Ltd]]||||1||7|| Link Required
|-
||[[VDOS|VDOS]]||1985||[[Vortex|Vortex]]||Provides 0.7 MB on B||1||7 or Lower|| Link Required
|-
||[[XD-DOS|XD-DOS 1.11]]||1987||[[Dobbertin|Dobbertin]]||Provides 0.7 MB formats||1||7 or Lower||Link Required
|-
||[[XD-DOS|XD-DOS 2.10]]||1990||[[Dobbertin|Dobbertin]]||Provides 0.7 MB formats and hard disc support||1||7 or Lower||[[Media:XDDOS210.ROM|XD-DOS ROM]]
|-
|'''Alternative OS ROMs'''|||||||||||||