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[Thomson MO6] Adding audio-in to load WAV files without a LEP

Joined
Nov 10, 2023
Messages
22
Location
Port Macquarie, Australia
The Thomson MO & TO range of computers (6809 based) have a similar cassette system to the Commodore - the cassette recorder (LEP) generates the TTL bitstream from the audio and passes it to the computer, rather than the computer doing the work.

If you have just the computer and nothing else then it can be a little tricky to load software without building additional hardware (easy if you have the parts handy).

The MO6 version has a built-in cassette recorder and thus comes with the necessary circuitry already.

You can then simply add a 3.5mm (or whatever you prefer) audio-input jack and load software:
[1] Obtain the WAV file or use DCMOK7 to convert from a K7 file
[2] Playback via Audacity (or similar) at 50% volume

On the MO6 itself you'll want to add the audio-input cabling to the collector of transistor TK02 on the cassette recorder board.


Thomson MO6 Audio Input.jpg Thomson MO6 Audio Input circuitboard.jpg
 
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