Sinclair QDOS - Versions

Versions

QDOS versions were identified by numerical version numbers. However, the QL firmware ROMs as a whole (including SuperBASIC) were given two- or three-letter alphabetic identifiers (returned by the SuperBASIC function VER$).

The following version of QDOS were released (dates are estimated first customer shipments):

• 0.08: the last pre-production version.

• 1.00: corresponded to the FB version QL ROMs, released in April 1984.

• 1.01: corresponded to the PM version ROMs. This was faster and had improved Microdrive support.

• 1.02: corresponded to the AH ROM version released in June 1984. This fixed many bugs and was the first ROM version to be produced in quantity.

• 1.03: included in ROM versions JM and TB; a minor bug-fix release issued in late 1984.

• 1.10: corresponded to the JS and JSU (US export version) ROMs, released in early 1985. This was the last version used in QLs manufactured for the UK market.

• 1.13: corresponding to the MGx series of ROM versions for European export markets. Included a significant number of bug fixes. The following localised versions of the MG firmware are known to exist:
  • MGE: Spanish
  • MGF: French
  • MGG: German
  • MGI: Italian
  • MGS: Swedish

The localised versions of QDOS were identified by the "." in the version number being replaced by the ROM version suffix letter used to identify the territory, e.g. the MGE ROMs contained QDOS version 1E13. All MG firmware versions shared the same bottom 32 kB ROM chip. Qdos 1.13 was also reported to be included in a Greek localised ROM version, known as ΣFP (marked on the ROMs as EFP).