RetroClinic DualOS ROM board

The RetroClinic DualOS ROM board provides several features to the Acorn Master that are not normally available.

  • The ability to switch between Acorn MOS 3.20 and 3.50
  • Year 2000 fixes
  • Built in support in ADFS for the RetroClinic DataCentre

The RetroClinic DualOS board fitted to an Acorn BBC Master

The wires leading away from the DualOS board are connected to a switch that enables the selection of the different Acorn MOS releases whilst the Acorn BBC Master is powered off.