TR-DOS

TR-DOS
Developer	Technology Research Ltd
Initial release	1984; 40 years ago
Latest release	5.03 / 1986; 38 years ago
Available in	English
Platforms	ZX Spectrum
License	proprietary

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.^[1]^[2] A clone of this interface is also used in the Russian Pentagon and Scorpion machines.

It became a standard and most disk releases for the ZX Spectrum, especially of modern programs, are made for TR-DOS as opposed to other disk systems.^[3]^[4]

The latest official firmware version is 5.03 (1986).^[5] Unofficial versions with various enhancements and bug-fixes have been released since 1990, with the latest being 6.10E (2006).^[6]

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.^[7]

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)

References

^ "Beta Disk Interface - World of Spectrum". Worldofspectrum.org. Retrieved 9 December 2018.
^ Woodcock, Colin (7 May 2012). The ZX Spectrum on Your PC. Lulu.com. ISBN 9781471696121. Retrieved 9 December 2018 – via Google Books.
^ Woodcock, Colin (December 2003). "TR-DOS". ZXF. No. 6.
^ Pavlov, Paul; Striker (2022). "Virtual TR-DOS". Virtual TR-DOS. Retrieved 9 December 2018.
^ Technology Research BETA 128 Disk Interface - User Manual. Technology Research Ltd. 1986. Archived from the original on 2016-09-23.
^ "Customized ROM". speccy4ever. Archived from the original on 2016-09-18. Retrieved 2016-08-19.
^ DISK INTERFACE Manual Supplement for version 4 of TR-DOS (PDF). Technology Research Limited. 1984.