This is Napalm's USB to PC link which allows you to download programs to the PS2.

Features:
* Remote filesystem (host:)
* printf (IOP and EE - use included example for EE)
* supports both EE and IOP programs
* Exception handler

Requires:
* PS2 with a way to boot cd-rs
* Prolific PL-2301 or PL-2302 cable
* PC running the NapLink client
* A functioning brain