A PC with a DB9 serial port or a USB-to-TTL (JP340/PL2303) converter cable.

: Do not disconnect power during the flashing process, as this can permanently damage the SPI flash memory.

First, let's clarify. The GX6605s is a popular processor for and DVB-T2 (Terrestrial) receivers. The "Loader" is the PC software (usually running on Windows) that flashes firmware ( .abs or .bin files) onto the receiver via a Null Modem cable (RS232) or USB-to-TTL converter.

Uses the serial port (COM port) to communicate directly with the receiver's hardware for recovery.