Felix HC series Felix HC are a series of ZX Spectrum clones manufactured in Romania from 1985 to 1994 by ICE Felix. The HC designation stands for Home Computer, and for the first four models in the series, the number indicates the year of first manufacture. Models in the series were: HC 85, HC 88, HC 90, HC 91, HC91+ (HC128), HC 2000 and HC386. The earliest version (HC 85) closely resembled the Spectrum, with a built-in BASIC interpreter, Z80A processor, 48 KB RAM, tape, and TV interfaces. It was used in schools/universities, and as a personal computer. An optional Interface 1 expansion was available for the HC 85, HC 90, and HC 91. It was functionally similar to the ZX Interface 1, but instead of Microdrives it supported single-density or double-density floppy disks. The HC 90 had a redesigned circuit board supporting fewer, larger memory chips; it was functionally equivalent to the HC 85. The HC 91 had a modified keyboard with 50 keys instead of 40. It had 64 KB RAM, and extra circuitry which provided CP/M support if the Interface 1 expansion was also present. The HC 2000 (manufactured from 1992 to 1994) had a built-in 3.5-inch 720 KB floppy disk drive, and 64 KB RAM. It could be used both as a Spectrum clone with added disk functionality (only 48 KB RAM available) or in CP/M mode, giving access to the full 64 KB memory. Essentially, it consolidated the HC 91, Interface 1, and floppy disk drive into a single case. The last model to be made in the Z80 line was the HC91+. It was a ZX Spectrum 128K clone in a HC91 case and keyboard, and had some compatibility problems. For the first time, the AY-8910 sound chip was offered as an add-on service, and was soldered on the board by factory technicians. Demoscene demos had problems running multi-colour effects, and displaying sound VU meter-like effects, through lack of data in the AY chip. JET JET was a Romanian clone from 1989 produced by Electromagnetica. JET is an acronym for Jocuri Electronice pe Televizor (Electronic Games on Television). TimS TimS was a Romanian ZX Spectrum clone developed in the university of Timișoara in Romania. Its name is a portmanteau of Timişoara and Spectrum. It had Source (ALIM) parallel and serial connectors, as well as ports for connecting a cassette recorder, and television set. Later