Kronos (computer)

Kronos ^[1]^[2] is a 32–bit workstation of a proprietary architecture developed in the mid-1980s in Akademgorodok, a research center of the Russian Academy of Science near Novosibirsk.^{[citation needed]}

History

In 1984, the Kronos Research Group (KRG) was founded by four students of the Novosibirsk State University, two from the Mathematical Department (Dmitry "Leo" Kuznetsov, Alex Nedoria) and two from the Physics Department (Eugene Tarasov, Vladimir Vasekin). At that time the main objective was to build home computers for the KRG members.^{[citation needed]}

In 1985, the group joined the Russian fifth generation computer project START, in which Kronos became a platform for developing modular multiprocessor reconfigurable systems MARS^[3] and played a leading role in the development of the first Russian full 32-bit workstation and its software.^{[citation needed]}

During 7 years (1984-1991) the group designed and implemented:^{[citation needed]}

Kronos 2.1 and Kronos 2.2 - 32-bit processor boards for DEC LSI-11
Kronos 2.5 - 32-bit processor board for Labtam computers
Kronos 2.6 - 32-bit workstation

The project START was finished in 1988. During the post-START years (1988-91), a number of Russian industrial organizations had expressed interest in continuing the Kronos development and some had been involved into facilitating the construction of Kronos and MARS prototypes, including the design of a Kronos-on-chip. Nevertheless, changing in funding levels and the overall economic situation during perestroika did not allow those plans to be realized.^{[citation needed]}

Architecture

Instruction set design was based on Niklaus Wirth's Modula-2 workstation Lilith, developed at the Swiss Federal Institute of Technology of Zurich, which in turn was inspired by the legendary Alto developed at Xerox PARC.^{[citation needed]}

The Modula-2-based Kronos was quite amenable to the basic principles of MARS, as Modula-2 is fundamentally modular, allowing programs to be partitioned into units with relatively well defined interfaces. These interfaces supported separate compilation of modules and separation of the module specifications from their implementation. The primary difference between Lilith and Kronos was that the latter was a 32-bit processor, compared with 16-bit Lilith, and Kronos incorporated a number of extensions to the instruction set to accommodate the inter-processor communication necessary in MARS.^{[citation needed]}

Kronos satisfied many aspects of the RISC design, although it was not pure RISC: the evaluation stack was used to evaluate expressions and to hold parameters for procedure calls. Since most of executed instructions were encoded in a single byte, the object code for Kronos was very compact. Although Kronos was a proprietary processor, it was nicely suited to the applications which were sensitive to high programmability rather than to software compatibility. For example, embedded control systems require fast and reliable design of new original applications for controlling unique objects and processes. Modula-2 was a perfect language at that time for this purpose, and Kronos was a perfect processor to effectively run the Modula-2 software.^{[citation needed]}

The Kronos software included:^{[citation needed]}

several versions of the proprietary operating system Excelsior
the Modula-2, C, and FORTRAN compilers
several CAD systems
several other applications

References

^ Kuznetsov, D.N., Nedorya, A.E., Osipov, A.V., Tarasov, E.V. The processor Kronos in a multiprocessor system. In “Computer systems and software”, V.E. Kotov, Ed., Novosibirsk, 1986, pp. 13-19 (in Russian).
^ Wolcott, P., Goodman, S.E. High-Speed Computers of the Soviet Union. Computer. Vol. 21, No. 9, 1988, pp. 32-41.
^ Kotov, V.E. Concurrency + modularity + programmability = MARS. Communications of the ACM. Vol. 34 No. 5, 1991, pp. 32-45.

External links

The Kronos Research Group recovered from Internet Archive
A Brief History of Modula and Lilith
Acquisition of a Kronos workstation and more by the National Museum of Science and Industry in London
Historical source code from Kronos 198x USSR 32-bit workstation
History of the Kronos project (in Russian)
High-Speed Computers of the Soviet Union
Emulator for the Kronos workstation (via Internet Archive) running under Windows-NT. Successfully tested under Windows XP. The following logins are possible: sys guest (both password free) See also: More Documentation of Kronos in Russian

[1] Kuznetsov, D.N., Nedorya, A.E., Osipov, A.V., Tarasov, E.V. The processor Kronos in a multiprocessor system. In “Computer systems and software”, V.E. Kotov, Ed., Novosibirsk, 1986, pp. 13-19 (in Russian).

[2] Wolcott, P., Goodman, S.E. High-Speed Computers of the Soviet Union. Computer. Vol. 21, No. 9, 1988, pp. 32-41.

[3] Kotov, V.E. Concurrency + modularity + programmability = MARS. Communications of the ACM. Vol. 34 No. 5, 1991, pp. 32-45.

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