I've been staring at schematics for the Genesis and Sega CD. Looking at the compatibility doc, you can see that the game
will not function on a VA6 alone. By default, the pin I'm most interested in remains low on the Genesis, while the Sega CD
pulls it high according to the service manual.
https://console5.com/techwiki/images...il%2C_1994.pdf
Page 6, 68 (CAS2) pulled low
Page 23, 12 (CAS2) pulled high
I might be getting ahead of myself, but it's very possible that pulling Paprium's B21 pin high with a 10K resistor
connected to pin A2 or A31 (5v power) might work. I'm placing a lot of theories on the table which I will test
out once my copy arrives.
I will test the game on my VA3 with and without the decoupling capacitor, and with and without the decoupling capacitor
while the Sega CD is attached.