Below is a link to a pre-configured Mednafen emulator setup to ease getting set up for King's Field speedrunning, as other emulators are banned. Mednafen normally works from the commandline, so we've included Mednaffe, which provides a graphical user interface and makes working with the program much easier.

https://www.mediafire.com/file/4aud7e8kcw8clkb/mednaffe_clean.zip/file

Instructions:

1. Extract the .zip archive to its own folder
2. Add your PS1 BIOS files to /firmware/
3. Add your disc image (bin/cue, etc.) files to /Games/
4. Launch mednaffe.exe
5. Double-click on the .cue file for the game you wish to run
6. Press Alt+Shift+1 on the keyboard to enter input configuration mode
7. Press the requested buttons on your controller or keyboard Input mapping notes:

• You have to press each button twice for (1) and (2)
• When it asks for Rapid, just press the same button again - Rapid is disabled in the settings

That's it! Let us know if you have any questions! Join the Discord!

Thanks to @ImJecht for help putting this together!

Note: the above instructions and link are intended for Windows 10 64-bit users. If anyone wants to help put together instructions for getting Mednafen set up on Linux or Mac, feel free to post here.