Any chance of 32mb ram swap so more psx games can work some work some wont all will work with 32mb 20mb is not enough for psx emulation.
This is zram swap, so it's basically the RAM being compressed on-the-fly when the resource is low. It's much faster than swapping to disk, but you cannot have as much as you want.
The current firmware already allows you to swap to disk and to select how much swap you want.
Put
this file in Media/data/local/etc and edit SWAP_FILE_SIZE_MB to select the amount of swap you want.
Note that I highly advise against using non-zram swap. It will slowly but surely trash your NAND and eventually make your RetroMini unusable. So instead of relying on hacks like that to get the PSX emu to work, just fix the f*** PSX emu already.