Before applying any Firmware, you must OPEN the player
to determine which EEPROM is installed.
29F040 EEPROM
39SF040 EEPROM
Once the EEPROM type is determined, you must confirm
that it is upgradeable by trying to access the hidden menu.
Additional information:
Norcent DP-300 manual (PDF)
Norcent on the web
DarrenK on the web