TR-DOS


TR-DOS is a disk operating system for the ZX Spectrum with Beta Disc and Beta 128 disc interfaces. TR-DOS and Beta disc were developed by Technology Research Ltd, in 1984. A clone of this interface is also used in the Russian Pentagon and Scorpion machines.
It became a standard in Russia and most disk releases for the ZX Spectrum, especially of modern programs, are made for TR-DOS as opposed to other disk systems.
The latest official firmware version is 5.03.
Unofficial versions with various enhancements and bug-fixes have been released since 1990, with the latest being 6.10E.
TR-DOS handles SS/DS, SD/DD floppy disks. All modern versions support RAM Disk and some versions support hard disks.
Current emulators support TR-DOS disk images in the formats .TRD or .SCL.

Commands

The following list of commands is supported by TR-DOS V4.
  • 40
  • CAT
  • CLOSE
  • COPY
  • ERASE
  • FORMAT
  • GO TO
  • INPUT
  • LOAD
  • MOVE
  • NEW
  • OPEN
  • PRINT
  • RETURN
  • RUN
  • SAVE
Utility programs include: