Didaktik

The Didaktik was a series of home computers based on the clones of Intel 8080 and Zilog Z80 processors produced in former Czechoslovakia.

Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 KB RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2.

Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware.

While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum 48K clones.

Didaktik Gama was the first clone of the ZX Spectrum with one speciality: 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. This computer had become an unreachable dream for many children and adults in former socialist Czechoslovakia as the computer was considerably expensive and seldom available to buy. It is said there were waiting lists several years long. The design of the computer was very simple — just a grey or black box the size of A5 with flat plastic keyboard and connectors mounted on the rear side. All games developed for the ZX Spectrum 48K were generally compatible with this computer. There is no need to say that it established massive and flourishing black market with these games country-wide as they were officially unavailable behind the "iron curtain". An audio cassette was used as the data store and a TV served as the monitor.

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