I am trying to attach bluepill to a real C64, and I've attached PA8 via the circuit listed in a Blink example with Supremacy tune.
Seems that everything works except first ~1 min, the sound is distorted. I am using STM32duino bootloader with USB and Roger clark core. May it cause such interference with internal IRQ?
I'm to understand that project uses this player. I discovered their project can't handle the RSID format. Does that extend down to this project? Or did something get borked between here and there?