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 (UK), 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 (1986). Unofficial versions with various enhancements and bug-fixes have been released since 1990, with the latest being 6.10E (2006).
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: FILER TAPECOPY (replaces BACKUP, COPY and SCOPY utility programs in TR-DOS V3) See also iS-DOS CP/M DISCiPLE
References
External links World of Spectrum Virtual TR-DOS Web TR-DOS. Encyclopedia of TR-DOS, ZX Games