IS-DOS
iS-DOS is a disk operating system (DOS) for Russian ZX Spectrum clones. iS-DOS was developed in 1990 or 1991, by Iskra Soft, in Leningrad, Soviet Union, now Saint Petersburg, Russia.
| Developer | Iskra Soft | 
|---|---|
| Initial release | 1990 | 
| Package manager | None | 
| Platforms | Russian ZX Spectrum clones | 
| Influenced by | TR-DOS | 
| Official website | trd | 
It handles floppy disks (double sided, double density), hard disk drivess, and CD-ROMs. Maximum iS-DOS partition size on a hard disk is 16 MiB.
Unlike TR-DOS, iS-DOS is random-access memory (RAM) based. Such operating systems reduce the amount of memory available for user programs.
Versions
    
iS-DOS Chic is a version developed for Nemo KAY. It provides more memory for user programs.
TASiS, based on iS-DOS Chic, is a modern version developed by NedoPC for ATM Turbo 2+ in 2006. It supports text mode and high memory of that machine.
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.
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