1. Configure the PSX Bios (SCPH1001 or SCPH7502) file
First you need the PSX Bios, this file copyrighted by Sony (please read the disclaimer below). It is a 512Kb file called "SCPH1001.bin" or "SCPH7502.bin" (other bios are supported, but these are the most common used), you can get it searching on google or with a app called Every BIOS
. After downloading and uncompressing if it would be in zip/7z or rar format, click on "Run bios" button. The first time ePSXe will scan your sdcard to find the path where it was saved, and will auto-configure the path on preferences. If it doesn't find the bios you can go to preferences>bios and choose the right path. If the bios was properly installed you tap on "run bios" button you will see some screens similar to the included in the previous screenshot.
2. Getting and running your first PSX game
The games must be provided for the users. You can dump your PSX games from CDROM on a PC (you can buy tons really cheaps on eBay or Amazon), or getting the game from internet. The games are copyrighted by different companies (please read the disclaimer below). To test the emulator, you could download a playable demo (it is not a full game, it is just a demostration), for example: Spyro the Dragon - demo
or more playable demos
. These demos are usually 7z/rar/zip compressed, so you will have to uncompress it with a app such as 7zipper
before playing, and you will get a bin/cue or img/ccd files. 7zipper is really easy to use, simply open the app, click and browsing on the sdcard folder search the path where you put the game, and click over it to choose the final path to uncompress. After that, click on "Run game" button. The first time ePSXe will scan your sdcard to find the path where the games was saved and it will create a list of games, which you can click to start to play. If the game was properly installed and you tap on "run game" button you will see some screens similar to the included in the previous screenshot.