The Jet was a Romanian Spectrum clone computer built in a telephone case! You can see the handset housing and the numeric keyboard replaced with black plastic masks.
The keyboard was made of printed pieces of paper inserted in transparent key-caps.
This system has been deeply modified by the user(s).
Zeno Mateescu, who owned a JET, reports:
The whole computer was more a HC-85 clone, designed more specificaly for computer games. That's where the name came from: JET-EM Aparat pentru jocuri pe ecran TV - machine for games on TV screen - if I remember well. It is indeed a Sinclair ZX Spectrum compatible computer. It didn't had any joystick connector (kempston or any other joystick) so I had to modify it to use a joystick. Another interesting thing about JET was that you
couldn't hear the program that was loading from the tape. On HC85, for example, you could hear that, let's call it noise, when loading the program.
- pal video signal: PAL: 1 Vvv / 75 ohm;
- radio signal: 1 mVeff / 75 ohm;
- the signal for the cassete recorder: 05 Vvv / 1 Kohm
Input signal from the cassete recorder: min 50 mVeff
Internal beeper: min. 55 dB SPL
Contributors: Costel Dumitru
We need more info about this computer ! If you designed, used, or have more info about this system,
please send us pictures or anything you might find useful.
Indeed it was slow, I think due to a 2.5 Mhz CPU instead of the standard 3.5 Mhz for HC-85. I owned one and was driving me mad for not being able to load the "nonstandard" games. How can I define them? When loading BASIC programs, the screen flickers in a specific way - it loaded such programs. More recent games however, used their own loading routine, which flicked the screen "differently". They were probably heavier on the CPU, ''coze they didn''t load on JET.
Finally I gave up, sold it, added some difference and bought a HC. What a difference!
Saturday 8th September 2012
I own one of these and I can say I$m very nostalgic when thinking of it, but it was rubbish. It$s processing speed was the slowest of them all (HC / TIM-S / CIP) and I know the technical specification of mine said 250 000 hz Cpu speed. At 4Mhz I had a PC286.. I think the specs displayed here are a little optimistic.
Monday 5th September 2011
Robert Teodorescu (Romania)
BUILT IN LANGUAGE
QWERTY mechanical 40 keys
MME 880D Zilog Z80 Russian clone
48 KB + 16 KB masked by the ROM
16 KB (Basic + O.S.) + 4 KB (Unknown)
32 x 24
256 x 192
8 with two tones each (normal and bright)
1 voice / 10 octaves (Beeper)
SIZE / WEIGHT
358 x 238 x 80 mm / 3 Kg max.
RF video out, RGB out, expansion port (not connected), tape-recorder (In, Out, Rem), external loudspeaker
Built-in power supply, 220 Vca + 10%, - 15%, 50 Hz +/- 1 Hz, Max power: 15 W