Posted By
siz
on 2014-08-13
18:17:01
|  Re: SD2IEC SID Player
Csabo, I wrote it as SIzPlay (like a lame pun of SIDPlay to include my name).
I've uploaded a new version instead of the previous one. This one has a bit improved functionality. In theory it should play every PSID file at the correct speed on either PAL and NTSC machines.
It's biggest problem is currently the memory allocation (it is in the middle of the memory under $8000 and can conflict with a lot of music).
There are several restrictions though: it will never play back RSID files (those require real-C64 environment with for example a BASIC ROM and I'll not emulate that on a plus/4. 
There are some SID's (like Gálya that Litwr found) that writes to the SID more than once in a frame. Those can be played back properly only by modifying the SID address in the player routine. This player won't do that. (Gálya toggles the gate bit off and on in the same call and the copy to the SID only see the latter change so the voices "fade out" because the gate bit will never trigger a new ADS phase, they will remain in R phase indefinitely).
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