DK'Tronics 3 Channel Sound Synthesiser

[PeterJ]

[mention]Einar Saukas[/mention] & [mention]druellan[/mention],

Would it be possible to add a group for 'DK'Tronics 3 Channel Sound Synthesiser'. I would like to add support for this for Plum Duff.

Thanks


https://spectrumcomputing.co.uk/entry/1 ... ynthesiser

PS - Thanks to [mention]druellan[/mention] who originally made me aware of how great this title is for testing!

[Alessandro]

Does anybody know about other titles that supported this device?

[druellan]

I'll try and do a search. At least we have two, including the software provided with the device.

[jimmy]

Does anybody know about other titles that supported this device?

I was going to suggest Star Trek 3000 https://spectrumcomputing.co.uk/entry/4 ... _Trek_3000 by DK'Tronics, as even though it doesn't mention it on the inlay, the code is definitely trying to write to an AY sound chip.

I've had a quick look at the code (well BASIC program) and it is OUT-ing to ports 159 and 191, not the ports used by the DK'Tronics unit (63/95). I wonder what sound unit used these ports? - it also does an IN 223 to check for the presence of the unit.

[jimmy]

It looks like the Fuller and DK'Tronics sound units use the same ports - 63 for register, 95 for data. I don't know if their clock frequencies to the AY are the same though.

The Star Trek 3000 game can be converted to use the Fuller/DK'Tronics sound unit by modifying 2 lines of BASIC:

• Modify Line 2 so variables O1=63 and O2=95 (yes that is the letter 'O')
• Modify Line 4 so variable sd=0 (rather than IN 223)

RUN the program again, and it is better than BEEPer noises - but only just

128K users can enjoy it too by running the game in 48K mode and setting O1=65533 and O2=49149