Uniden Bearcat UBC-3500XLT
Dump EEPROM test mode: 1+9+HOLD + power on

Serial remote commands work in test modes. Read EEPROM bytes by using KEY,>,P and STS commands. Add loop to this code and save (parse content from STS cmd) to e.g. file.

import serial

ser = serial.Serial('COM4', '115200', timeout = 0.5)
print(ser.name)
ser.write(b'KEY,>,P\r')
b = ser.read(8)
ser.write(b'STS\r')
result = ser.read(64)
print(result)
ser.close()