I'm currently running a V9 ps2 with an MI 1.93 installed and dev1 is working flawlessly but cdr/dvdr backups with no longer work, original cd/dvd games are fine.
Now ironically I disconnected the 3.3v connection on my chip to troubleshoot a black screen problem when I originally installed. But it sprang to life after reassembling the unit and has works fine for several months ( though this still baffles me ). It even shows the firmware version number below the ps2 logo when it boots originals
Anyone happen to know which points a responsible for booting backups, or could shed some light on how this could work in the first place haha