High Quality Content by WIKIPEDIA articles! The Agat (Russian: Агат) was an 8-bit serial computer produced in the Soviet Union. A clone of the Apple II with some modifications, it was only partially compatible with Apple. Commissioned by the USSR Ministry of Radio, for many years it was a popular microcomputer in Soviet schools. First introduced at a Moscow trade fair in 1983, the Agat was primarily produced between 1984 and 1990, although a limited number of units may have been manufactured as late as 1993. The Agat was based primarily on the design of the Apple II PC, but circumstances in the Soviet Union necessitated certain changes to the design. Primary among these were the lack of a reliable local source of the MOS Technology 6502 microprocessor. To compensate for this, a domestically produced "partitioned 588 series" CPU was used instead, which simulated the 6502 instruction set. While this permitted some degree of compatibility with the Apple, timing differences between the two CPUs rendered certain tasks (such as hard disk access and sound generation) impossible.

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