🇫🇷 Thomson TO7/70: Part 1 (First look) [TCE скачать в хорошем качестве

🇫🇷 Thomson TO7/70: Part 1 (First look) [TCE

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 TRS-80 CoCo, Dragon Data and SuperPET. Unlike the MO5, the TO7 doesn't have BASIC built-in and requires it on a cartridge. Interestingly it does have a built-in 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 8-bit 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 top-left 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...