Posted By
siz
on 2019-06-16
06:39:48
|  Re: sid card sid frequency
As I recall only the first few prototype SIDCards required switching to single clock. The "widely" spread versions didn't need that. And they also listened to both $fd40 and $fe80 addresses.
As these SIDCards used TED single clock (886kHz for PAL) they sound a bit different (lower frequency) compared to the C64 for the same tune.
The NST SIDCards (and according to BSz no, probably there won't be a new batch of these) use the same frequency for compatibility reasons but can be switched to original C64 frequency. Some of the SID players (like SIzPlay and SD2IEC SID Player V2) use these feature the allow listening to C64 tunes in original form.
|
