TR-DOS explained

TR-DOS
Developer:	Technology Research Ltd
Latest Release Version:	5.03
Language:	English
Supported 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 (command)|COPY]]
• [[del (command)|ERASE]]
• [[format (command)|FORMAT]]
• GO TO
• INPUT
• LOAD
• [[move (command)|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

External links

• World of Spectrum
• Virtual TR-DOS
• Web TR-DOS. Encyclopedia of TR-DOS, ZX Games

Notes and References

1. Web site: Beta Disk Interface - World of Spectrum. Worldofspectrum.org. 9 December 2018.
2. Book: Woodcock, Colin. The ZX Spectrum on Your PC. 7 May 2012 . Lulu.com . 9781471696121. 9 December 2018. Google Books.
3. News: Woodcock . Colin . December 2003 . TR-DOS . ZXF . 6 .
4. Web site: Pavlov . Paul . Striker . 2022 . Virtual TR-DOS . 9 December 2018 . Virtual TR-DOS.
5. Book: Technology Research BETA 128 Disk Interface - User Manual . Technology Research Ltd . 1986. https://web.archive.org/web/20160923142910/http://z00m.speccy.cz/docs/betadisk.txt . 2016-09-23 .
6. Web site: Customized ROM . dead . https://web.archive.org/web/20160918231824/http://zxspectrum.it.omegahg.com/_TR.htm . 2016-09-18 . 2016-08-19 . speccy4ever.
7. Book: DISK INTERFACE Manual Supplement for version 4 of TR-DOS . Technology Research Limited . 1984.