IS-DOS

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title: "IS-DOS" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["microcomputer-software", "disk-operating-systems", "zx-spectrum", "computing-in-the-soviet-union", "soviet-inventions"] description: "Disk operating system for Soviet/Russian ZX Spectrum clones" topic_path: "technology/operating-systems" source: "https://en.wikipedia.org/wiki/IS-DOS" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Disk operating system for Soviet/Russian ZX Spectrum clones ::

::data[format=table title="Infobox OS"]

Field	Value
name	iS-DOS
developer	Iskra Soft
working state	current
source model	Closed
released
package manager	None
supported platforms	Russian ZX Spectrum clones
kernel type	Monolithic
influenced by	TR-DOS
::

| name = iS-DOS | logo = | screenshot = | caption = | developer = Iskra Soft | programmed in = | family = | working state = current | source model = Closed | released = | latest release version = | latest release date = | marketing target = | update model = | package manager = None | supported platforms = Russian ZX Spectrum clones | discontinued = | kernel type = Monolithic | userland = | influenced by = TR-DOS | ui = | succeeded by = | license = | website =

iS-DOS is a disk operating system for Soviet/Russian ZX Spectrum clones. iS-DOS was developed in 1990 or 1991, by Iskra Soft, in Leningrad, Soviet Union, now Saint Petersburg, Russia.

It handles floppy disks (double sided, double density), hard disk drives, and CD-ROMs. Maximum iS-DOS disk partitioning size on a hard disk is 16 MiB.

Unlike TR-DOS, iS-DOS is resident in random-access memory (RAM), and thus reduces the amount of memory available for user programs.

Versions

iS-DOS Chic is a version developed for the Nemo KAY. It provides more memory for user programs.

TASiS, based on iS-DOS Chic, is a modern version developed by NedoPC for the ATM Turbo 2+ in 2006, supports the enhanced text mode and larger memory of that model.

Distributors

• Slot Ltd. (Moscow) distributed iS-DOS in Moscow and regions in 1990s, and issued paper books.
• Nemo (Saint Petersburg) distributed iS-DOS in ex-USSR until 2004, and issued Open Letters electronic press.
• iS-DOS Support Team (Saratov Oblast) distributes iS-DOS in ex-USSR and issues iS-Files electronic press.
• NedoPC distributes TASiS as freeware.

Books

• Картавцев И.Ю, Самыловский С.В., Криштопа С.В. "iS-DOS. Руководство пользователя". IskraSoft, Slot, С-Пб, Москва, 1993, 128 стр.
• Криштопа С.В. "Операционная система IS-DOS для ZX-SPECTRUM. Руководство программиста". "IskraSoft" С-Пб, "Slot" Москва, 1994, 84 стр.

References

References

1. (1996). "iS-DOS Classic v4.5". Iskra Soft Ltd.
2. (2018). "Operating Systems Database: iS-DOS".
3. (1999). "Nicron #108 - Advertising - advertising and announcements - Nemo - KAY-1024/3sl/turbo".
4. "НОВОСТИ".
5. "OS TASiS ver.5.41".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::