MOS SID sound card for ZX Spectrum edge connector (ZX-BUS).
PCB is compatible with SID 6581 and 8580, but also contains integrated SwinSID emulator.
SID accessible via #xxCF port, where xx - SID's register number.
You may connect your ZX Spectrum audio output to second 3.5mm jack and it will be mixed in sound card output signal.
NOTE: +12V/+9V voltage is strictly required for SID, your ZX Spectrum or clone must provide it on the edge connector.
- Rev.A - initial release with SID, AY and Covox. Errata.
- Rev.B - abandoned. Files kept for historical reason.
- Rev.C - removed AY and Covox. Added SwinSID emulator. PCB is vertical oriented now.
- Rev.D - improved signal-noise ratio. Fixed read from SID chip.
TODO:
- Check with 8580 SID chip;
- Further improve signal-noise ratio.