Didaktik Gama

Didaktik Gamma is a clone of the 48K ZX Spectrum made by the slovak company Didaktik Skalica Ltd. All models come with 80 KB of RAM and 16 KB ROM, built-in paralel i8255 interface, 40 key keyboard, power and bank LED and reset button. They all use the original Ferranti ULA, Z80A and russian memory IOs. The 80 KB RAM consisted of 16 KB base memory (as the 16K Speccy) with another 32K (as the Speccy 48K) but instead of just one it had two 32K blocks that was switchable using OUT 127. Because some differences in the system variables it wasn't 100% compatible with the ZX Spectrum but it was possible to do some pokes and get it almost fully compatible.