Though MasterDOS doesn't seem to be available for download in an assembled form, I noticed that Andy Wright has made the source available. I've never had / used / tried MasterDOS, but I thought I might so I am wondering - should an assembled version be available somewhere I haven't looked, or do I need to find an assembler that supports its layout (no colons to mark the end of labels, all capitals)? If so, can anyone suggest one?
-Thomas