: Connect to the Syscon chip using a serial interface to extract its internal memory.

: Use software tools to modify the "slot" indicators in the Syscon dump, tricking the console into thinking 9.00 is the active version.

: You must create 1:1 backups of your current firmware data before patching them to switch slots. Step-by-Step Overview (Technical)

Downgrading PS4 Firmware 9.03 to 9.00: The Reality and the Fix

: You will need a programmer like the Teensy 2.0++ , an Arduino Nano , or specialized tools like Wee Tools.

There is no "software-only" fix to downgrade 9.03 to 9.00. The only verified method is a . How the Reversion "Fix" Works

 suncalc.org
reverse calculation
from the sun altitude/azimuth at time
Sun Altitude: 0° - 90°
Sun Azimuth: 0° - 360°
Period calculation:
Accuracy: