## ZX-TSid
MOS SID sound card for ZX Spectrum edge connector (ZX-BUS).

[![photo](images/revC-side1.small.jpg)](images/revC-side1.jpg?raw=true) [![photo](images/revC-side2.small.jpg)](images/revC-side2.jpg?raw=true)

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.

### Changelog & current status
* Rev.A - initial release with SID, AY and Covox. [Errata](pcb/rev.A/ERRATA.txt).
* 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.