reSID is one of the best simulators, and actually does capture a lot of the quirks of the 6581. Take a look at the source, some of the models are actually base

reSID is one of the best simulators, and actually does capture a lot of the quirks of the 6581. Take a look at the source, some of the models are actually based on electrical characteristics (filter.cc and filter.h for example). https://github.com/VICE-Team/svn-mirror/tree/main/vice/src/resid https://github.com/VICE-Team/svn-mirror/tree/main/vice/src/r...