Dragon DOS

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Revision as of 09:06, 22 July 2010 by Admin (talk | contribs) (Dragon DOS Interface)

Dragon DOS 1.x

Dragon Data Ltd comissioned The Micro Works to write the original Dragon DOS, some pre-release examples of this including the (c) Micro Works signature can be found in the downloads area. Shortly after release a number of bugs were discovered in 1.0 and a number of articles were published in Dragon User with patches to the ROM code to correct the worst of these. The most common version is 1.0, it is not known if any other version was officially released although 1.7 has been seen but the source of 1.7 and the differences with 1.0 are unknown at this time.

Dragon DOS 2.x

For the Dragon Alpha a modified version of Dragon DOS was required, one that would load into RAM from disk rather than exist on a ROM. Vivaway Ltd were given the source code for Dragon DOS 1.x and Dragon DOS 2.x was created. A VDK disk image of Dragon DOS V2.F for the Dragon Alpha can be found in the downloads area. From looking at segments of the original Dragon DOS 2.C source code it would appear that Vivaway Ltd implemented the changes as options so that the source code could be assembled for a Dragon ROM or RAM implementation - There is also an option that appears to infer it would also assemble to work on a Tandy CoCo.

Dragon DOS 4.x

Eurohard wanted to release an updated Dragon DOS for the Dragon 64 / Dragon 200 that contained all the known bugfixes and to avoid confusion with the 2.x series numbering they jumped straight to V4.0. A ROM image of this is available for download.

Dragon DOS Interface

DiskController Top.jpg
DiskController Bottom.jpg
DiskController PCB Top.jpg
DiskController PCB Bottom.jpg

See Also

Delta DOS

Super DOS

Cumana DOS

DOSPlus