Version 3.3 is released: https://github.com/wavemotion-dave/A5200DS
It's been a year and a half :)
V3.3 : 30-Apr-2023
Improved screen blend so it leaves less visible artifacts.
Improved sound mute so it eliminates most of the little pops...
The best thing I could think of would be to get your PSX fix on console, or look into hardware upgrades :unsure: I don't know how much either will help you though. It's a frustrating feeling.
Got it working now. Slow Emmc was caused by a too long DAT0 cable. Routed it originally around the CPU. No it is connected directly (~ 5cm shorter).
Slow Emmc fixed and thus OFW Black Screen fixed.
Recreated EmuNand and no longer package1...