swinkels

SwinSID is working asynchronously so it ignores CLK and WR lines. Only CS is checked. One of the WR or CS lines can be used as a most significant address bit when we add them with AND gate. It is very hard to do a good synthesizer from a slow 8 bit CPU. SwinSID can simulate a SID registers which is slowing down, but the SwinSID2 is specially designed to achieve best results from an AVR. There are 6 oscillators which can be joined in chain to get FM, AM and other modulations. I think it has potential but there is no software and project was abandoned. I have done a 2x oversampling mode instead of interpolation in SwinSID recently. Now it should sounds more like SID. (Its internal mixing frequency is now 62,5 KHz.) I will release updated firmware in few days.

Hi I'm the creator of SwinSID. This thread looks very interesting so i decided to join. First of all SwinSID was created to work best with C64 but should work well in any SID compatible device. It uses a bit different wave shapes and only a digital aproximation of 1MHz SID output so it dosen't sound like SID and will never be. As Seppoman said, SwinSID is slowing down, when a several thousand of requests is sending to card. I can't say where is the limit, but almost all c64 tunes works well. TDA1543 is really rare to find, but also very cheap (1,5 euro ) My first prototype was working on a AD1868. TDA1543 can be simply replaced by any stereo DAC with I2S interface without code change. Parallel 8 Bit output is also avaible. I can make some changes in SwinSID to better fit your needs for example turning off pseudo reverb can give an extra CPU power for noise generator. If i decrease sampling frequency and add new address line there is possibility of 6 channel 2SID in 1SwinSID mode. Unfortunately i can't enable all these features in one time due to CPU limitations. Thanks for your interest