Step 1
Download the latest mister psx core(https://github.com/MiSTer-devel/PSX_MiSTer)
Step 2
Copy psx core to root directory of mister sd card
Step 3
Create a games/psx folder in the root directory of the sd card，Copy the game files and playstation bios file to this folder.
NOTE：Rename your playstation bios file (e.g. scph-1001.bin/ps-22a.bin ) and place it in the ./games/PSX/ folder.
boot.rom => US BIOS
boot1.rom => JP BIOS
boot2.rom => EU BIOS
BIOS download address：https://www.planetemu.net/roms/sony-playstation-bios
Step 4
Put the SD card into the DE10-nano and power it on.Connect a keyboard to your DE10-nano and Select PSX core.
Step 5
Click F12 or ‘OSD’ button on IO motherboard to open the menu.
Step 6
Click the ‘↓’ button on the keyboard，Choose ‘pad1’ ，Click the ‘Enter’ button on the keyboard to select ‘SNAC-port1’.(If you use dual controllers, follow this method to set up ‘Pad2’.)
Step 7
Go back to the first option and click to enter the game directory.
Step 8
Run any game you like, and you can use the original ps1 controller after entering the game.