Duo 3 Ultra

Jumperless solution for v1-v18 * Pal, US and Jap machines.
compatible with 7700X and 7900x * machines as well
Possible compatibility with 9000x as well, see diagram submitted by a duo user.
20 wire solution.
Low profile design.
Low voltage design, 3.3V
Auto boot PS2, PSX games and movies.
DVD movie region free *
Boot programs from the Memory card (dev1 mode)
Boot programs from HDD (dev2 mode)

PS2 Mode
PS2 Originals & DVD9 Originals
PS2 Original imports & DVD9 Original imports
PS2 DVD9 silver
PS2 DVD Backups
PS2 CDr Backups
Compatible with Gameshark and Action Replay
Compatible with PS2 MediaPlayer 1.50 (DivX, Mp3, jpeg)
Compatible with HDLoader and HDAdavnce.

PSX Mode
PSX Originals
PSX Original Imports
PSX CDr Backups
Full screen

Disable Mode
The ability to disable the modchip has been included for future use.