models were equipped with a joystick port, and came with 192 KB RAM and an AY-3-8912 sound chip. Production continued into the early 1990s. South American Czerweny CZ The Czerweny CZ 2000, Czerweny CZ Spectrum and Czerweny CZ Spectrum Plus were Argentinian ZX Spectrum clones which were produced from 1982 (after the Falklands war) until an electrical fire destroyed the factory in Paraná in June 1986. Microdigital TK90X The TK90X was the first Brazilian ZX Spectrum clone. It was launched in 1985 by Microdigital Eletronica, a company located in São Paulo, Brazil, which had previously manufactured ZX81 clones (TK82, TK82C, TK83, and TK85) and a ZX80 clone (TK80). The ROM was hacked to include a UDG editor, and accented characters. In spite of this, incompatibility issues with ZX Spectrum software are very rare. The keyboard membrane is more durable than that found on the original ZX Spectrum 48K. The TK90X also features a Sinclair-compatible joystick port. Microdigital TK95 The TK95 microcomputer was the successor to the TK90X. Launched in November 1986, its improvements were largely cosmetic, as it uses exactly the same PCB as the TK90X, but had its ROM capacity increased to 16 KB. South Korean Samsung SPC-650 The Personal Computer SPC-650 was a South Korean clone of the ZX Spectrum+ by Samsung, with a similar design to the original machine. Soviet/Russian ATM Turbo The ATM Turbo (ru: АТМ-ТУРБО) was developed in Moscow in 1991 by two companies: MicroArt and ATM. It featured a 7 MHz Z80 processor, 1024 KB RAM, 128 KB ROM, AY-8910 sound chip (two were fitted in upgraded models), 8-bit DAC, 8-channel ADC, RS-232 and Centronics ports, Beta Disk Interface, IDE interface, AT/XT keyboard, text mode (80×25, 16 possible colours in an 8×8 pattern), and two additional resolutions of 320*200 and 640*200 pixels. A substantial part of the ATM design was transferred to the Baseconf core of the ZX-Evolution computer. Baltica Baltica (or Baltic, ru: Балтик) was a Soviet clone of the 48K ZX Spectrum. Its CPU (K556PT4 or K155PE3) ran at a higher frequency (4 MHz) which made it less compatible. It was first released in 1988 by a company named Sonet from Minsk and different versions exist, with expanded hardware and operating systems, compared to the original ZX Spectrum. Best III The Best III was a ZX Spectrum clone made in St. Petersburg in 1993. The size of the system unit is 16.8