For anyone interested - I found a solution to this which I've put in the Issue Tracker on the libretro gpsp github repo. This is unlikely to be merged with the master core so will need to be applied to the code and then the core built from...
@benone @Happy1337
I'm back :D
So I need your help again if that's ok? Above you say that Sims 2:The Pets / Teen Titans / Monster House works ok in TempGBA4PSP-Mod (I believe it is this variant because you quote 20160527 as being the version...
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi