DIDAKTIK GAMA - (CSSR - Czechoslovak Socialist Republic) - very good NOS condition, complet , full works, tested Didaktik Gama was a ZX Spectrum clone with 80 KB RAM divided into two switched 32 KB memory banks and 16 KB of slower RAM containing graphical data for video output, while the size of ROM was 16 KB.[2][13][14] A peripheral interface with a 8255 chip was added, providing centronics plotter and printer connections and a Kempston joystick port. The case was similar to that of the ZX Spectrum+, a grey or black box in A5 size, with a flat plastic keyboard and connectors mounted on the rear side. The Gama uses a standard ULA chip made by Ferranti. All games developed for the ZX Spectrum 48K were generally compatible with this computer. An audio cassette was used as data storage and a TV served as a monitor. It is generally said the Gama was unreachable to buy and there were waiting lists several years long.[citation needed] Didaktik Gama was produced in three variants: the first, Gama '87, fixed some bugs in the original ZX Spectrum ROM (thus breaking compatibility with some software) and introduced its own bugs effectively inhibiting the use of the second 32 KB memory bank from BASIC. Gama '88 fixed the original ZX Spectrum bugs in a more compatible way, and also fixed the memory switching bug. The final and the more compatible model was Gama '89. The computer was expensive but available on the market and could be purchased in Czechoslovak currency outside specialized Tuzex stores, unlike other foreign home computers. Production of Didaktik Gama computers ceased in 1992.