Ioprp252img Guide

The IOP executes the code within the image, setting up drivers for the DVD drive, sound processor (SPU2), and controllers.

Throughout the game, the IOP runs these modules in the background, freeing up the EE to focus on 3D graphics and complex physics. PlayStation 2 - Википедия ioprp252img

The Emotion Engine sends the ioprp252img data to the IOP's RAM. The IOP executes the code within the image,

In some cases, homebrew developers modify these images to add support for modern peripherals, such as USB-based controllers or hard drive loading via the Network Adapter. How it Works sound processor (SPU2)

Emulators use these images to accurately simulate how the IOP handles data. If an emulator cannot find or correctly interpret the IOPRP modules, games may fail to boot or experience controller lag.