Let's have a look at the Thomson TO7/70 ordinateur français, an upgrade on their original TO7 (or tele/ordinateur) machine with 64Kbytes of RAM (up from 24KBytes), expandable to 128KBytes. There's a few versions of the machine: apparently an original with a membrane keyboard, a 2nd version with the rubber keyboard (like mine) and a 3rd version with a mechanical keyboard (as shown on my machine's box art ... interesting).

As with most other Thomson machines it runs on the Motorla 6809, the same as the TRS80 CoCo, Dragon Data and SuperPET.

Unlike the MO5, the TO7 doesn't have BASIC builtin and requires it on a cartridge. Interestingly it does have a builtin light pen (or crayon optique) the MO5 has a port to connect one.

The TO7's internal power supply also appears to offer 13VDC (unregulated it seems) via a 2.1mm DC socket ... so possibly to power the cassette recorder.

Like the MO5, it can load software from cassette but requires a custom cassette recorder (similar to the Commodore 8bit machines) that decode the audio signal and sends a TTL bitstream to the computer.

Unfortunately it looks like my machine has a faulty the keyboard membrane the topleft keys ... [1] to [6], [STOP] and [CNT] ... don't give any response. Most other keys beep when pressed. This means that I can't actually do anything as the numeric keys are required to select a cartridge or the light pen, for example.

I did give the membrane a quick clean with isopropyl alcohol (IPA) but no improvement.

So some further work required:
http://dcmoto.free.fr/bricolage/clavi...