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[[Category:Expansion ROM]]
[[category:Disc Operating System]]
ROMDOS was the most successful high-capacity disc operating system (DOS) published for the CPC. Originally developed by [http://www.tyndalearchive.com/Brewer/author.htm Dave Instone-Brewer] for [[KDS]], it was later resold by [[Siren Software]].
ROMDOS shipped on a single 16k ROM, though a RAM-resident version, RAMDOS, was also available. The ROM was essentially a modified version of the standard AMSDOS ROM, with support added for 80-track and double-sided formats. As a result, the format of the disc was detected automatically, just like standard AMSDOS - a big improvement over competing systems such as [[MS800]].
