Posted By
Bionic
on 2005-07-28
02:46:34
|  Re: The +4 King's Collection :)
Luca: no time  Which is a pity..
Chris: I do not understand why you or Jurek need physical hardware to build a new SID card? Solder published the schematics on his website - and if you are in need of the PCB layout it would maybe clever (and also more fair) to contact him directly?
Besides that I would not recommend to use the old design:
- It uses a fairly inefficient DC DC converter, disallowing to use a 6581 and wasting lots of power.
- The audio amplifier adds quite some distortion because the second transistor stage is driven into saturation.
- The SID is not clocked at the correct frequency.
See also here:
http://www.tu-harburg.de/~setb0209/cpu/images/sidsamples/
If Jurek is willing to design a new SID card I will happily help him out.
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