I was hoping I could get the samples directly ripped from the .ROM for the clarity
Well the PSS-170 used a yamaha 2 operator FM/OPL ‘synthesis’ chip, so you would probably find that there is just one basic sine wave stored in rom. In other words there isn’t a 4/8/12 bit ‘Popcorn’ sample that you can just cleanly rip from the rom binary data (even if you had the rom binary data.) You would probably have to reverse engineer the preset data to work out how the operators/envelope/algos ‘FM’ was wired for the ‘Popcorn’ sound (unless someone has already done this feat on the internet) and feed that into say a FM/OPL VST emulator and sample that output.
Noisetoys ‘sampled’ a PSS 150 → https://forum.renoise.com/t/80s-keyboard-samples-yamaha-portasound-pss150/46266However the link is down. Don’t know if someone can upload that again.
Also a couple of PSS 170 ‘samples’ at → http://freewavesamples.com/source/yamaha-pss-170