My fat SCPH-50001/N has a DMS3+pro chip in it (its got the B7 firmware update) and i just started using this ps2 again. Ive got it premodded from modchipcentral many years ago when the chip was new. I used to be able to boot to a psx disc by holding O upon booting the console. That was almost 10 years ago. Ive only since updated ulaunchelf and added some games to the HDD (with an oem network adapter. I bought it new at the time). I fiddled with remembering (not much has changed) how to ftp...
Booting psx on a DMS3 chip
Booting psx on a DMS3 chip
