Editing List of ZX Spectrum clones (section)

==== Didaktik series ====
{{Main|Didaktik}}
The '''[[Didaktik]]''' was a series of home computers produced by Didaktik in [[Skalica]], in the former [[Czechoslovakia]].<ref>{{cite web |date=15 December 2014 |title=Home Computers Behind The Iron Curtain |url=https://hackaday.com/2014/12/15/home-computers-behind-the-iron-curtain/ |accessdate=9 August 2015}}</ref><ref name=":03">{{Cite web |title=Sinclair Nostalgia Products - Sinclair Clones - Didaktik Skalica Ltd. |url=https://zx.interface1.net/clones/didaktik.html |access-date=2023-01-17 |website=zx.interface1.net}}</ref><ref>{{Cite web |title=Kompakt Didaktik |url=https://www.old-computers.com/museum/computer.asp?st=1&c=953 |access-date=2023-01-17 |website=www.old-computers.com}}</ref><ref>{{Cite web |title=OLD-COMPUTERS.COM : The Museum |url=https://www.old-computers.com/museum/company.asp?st=1&m=162 |access-date=2023-01-17 |website=www.old-computers.com}}</ref><ref>{{Cite web |title=Domov |url=https://www.didaktik.sk/ |access-date=2023-01-17 |website=www.didaktik.sk}}</ref><ref>{{Cite web |title=1000BiT - Computers list by manufacturer |url=https://www.1000bit.it/database2.asp?id=393 |access-date=2023-01-17 |website=www.1000bit.it}}</ref>

The first model compatible with the ZX Spectrum was the '''Didaktik Gama''',<ref>{{Cite web|url=https://www.sinclaircollection.site/?page_id=502|title=Didaktik Gama – Sinclair Collection Site}}</ref> based on the [[U880]] or [[Zilog Z80]] [[central processing unit|processors]] and the original ULA chip. It was produced in three variants between 1987 and 1989. The Gama has a built-in 8255 chip (used for the Kempston joystick, and also as a printer port) and 80&nbsp;KB RAM, adding an alternative memory bank from the address 32768 to 65535.

The Gama was followed by the cheaper '''Didaktik M'''<ref>{{Cite web|url=https://www.sinclaircollection.site/?page_id=504|title=Didaktik M – Sinclair Collection Site}}</ref> (first variant released in 1990; the second in 1991). The model M had a modernised case, Sinclair and Kempston Joystick ports, and a keyboard with cursors and reset key. The design, however, was of lower quality than the Gama. Its screen aspect ratio and display timing are different from the original ZX Spectrum because the M uses a different ULA chip, compatible with the Belarusian clone Baltik. It ran at 4&nbsp;MHz. The final model was the '''Didaktik Kompakt''' (1991) which integrated all previous M hardware with a 3.5″ floppy disk drive.

Unlike previous versions, the '''Didaktik 192K''' was an amateur project, partly combining the hardware of the Didaktik Gama and the ZX Spectrum 128K.<ref>{{Cite web|url=https://cygnus.speccy.cz/popis_prestavba_didaktik-gama-192k.php|title=Cygnusova stránka o Sinclair ZX Spectrum|website=cygnus.speccy.cz}}</ref>

<gallery>
File:Didaktik Gama.jpg|Didaktik Gama (pre 1989 design)
File:Gama 1989.jpg|Didaktik Gama (post 1989 design)
File:Didaktik M.jpg|Didaktik M
</gallery>