TR-DOS filesystem

Revision as of 01:35, 11 September 2019 (view source) Dan Tobias (Talk | contribs) (→‎Links) ← Older edit		Revision as of 02:14, 13 September 2019 (view source) Dan Tobias (Talk | contribs) (TRD moved to separate page) Newer edit →
Line 8:		Line 8:
	| subcat5        =		| subcat5        =
	| thiscat        =		| thiscat        =
−	| extensions    = {{ext|trd}}	+	| extensions    =
	| mimetypes      =		| mimetypes      =
	| locfdd        =		| locfdd        =
Line 15:		Line 15:
	| type code      =		| type code      =
	| uniform type  =		| uniform type  =
−	| kaitai struct  = tr_dos_image	+	| kaitai struct  =
	| conforms to    =		| conforms to    =
	| released      =		| released      =
Line 58:		Line 58:
	|}		|}
−	== {{ext|trd}} files: TR-DOS disk images ==	+	Diskettes can be dumped to [[TRD]] files for use in emulators.
−		+
−	Diskettes can be dumped to {{ext|trd}} files, which are plain sector-by-sector headerless dumps (the same idea as <code>/dev/fd0</code>). Each sector is 256 bytes, each track contains 16 sectors. Tracks are arranged in the same order as "logical tracks" in TR-DOS: 0th track on 0th side, 0th track on 1st side, 1st track on 0th side, 1st track on 1st side, …. If remaining sectors at the end of floppy are unused, {{ext|trd}} file can be less than actual floppy size. These files are supported by most ZX Spectrum emulators.	+
	== Links ==		== Links ==
−
−	* [http://www.zx-modules.de/fileformats/trdformat.html TRD disk image format - ZX-Modules.de]
−	* [https://faqwiki.zxnet.co.uk/wiki/TRD_format TRD format - Sinclair FAQ wiki]
	* [https://web.archive.org/web/20140409113112/http://k1.dyndns.org/Vintage/Sinclair/82/Peripherials/Disc%20Interfaces/Beta%20128%20Disc%20Interface%2C%20TRDOS%20%28Technology%20Research%29/TRDOS/TR-DOS%20Programming.txt Internal TR-DOS functions]		* [https://web.archive.org/web/20140409113112/http://k1.dyndns.org/Vintage/Sinclair/82/Peripherials/Disc%20Interfaces/Beta%20128%20Disc%20Interface%2C%20TRDOS%20%28Technology%20Research%29/TRDOS/TR-DOS%20Programming.txt Internal TR-DOS functions]
−	[[Category:Disk Image Formats]]
	[[Category:ZX Spectrum]]		[[Category:ZX Spectrum]]

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Revision as of 02:14, 13 September 2019

File Format
Name	TR-DOS filesystem
Ontology	Electronic File Formats Filesystem TR-DOS filesystem

TR-DOS is an operating system for ZX Spectrum personal computer with Beta Disc floppy drive interface. Despite being developed by British company Technology Research Ltd, it was not especially popular in the West, but was more popular in USSR and post-USSR in 80-90s.

5¼" and 3½" floppies are used with the following formats:

Number of tracks per side	Number of sides	Number of tracks (total)	Number of sectors	Number of bytes
80	2	160	2560	655360
40	2	80	1280	327680
80	1	80	1280	327680
40	1	40	640	163840

Diskettes can be dumped to TRD files for use in emulators.

Links

• Internal TR-DOS functions