Posted By
BSZ
on 2016-09-04
16:00:18
|  Re: Sid Card 4. (mini) serie
SwinSID is maybe working, but some modifications required for proper operation. Two major problems:
1: The SwinSID audio output stage is wrong for SID-card, some plus components required for good audio quality. Sound volume is lower (?) than original SID chip, but this is not a big problem.
2: The original SwinSID not use the CPU clock; therefore only "985 KHz mode" is useable, the plus/4's "886 KHz mode" is not available. This "mode signal" is available on the card, but not wired to SID socket. (Of course.) If this line connected to SwinSID, AND modify the SS's firmware for using this "mode signal", then useable the "886 KHz mode" in the future.
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