which ar do i need?

[craigy]

hi charlie its me again the thicko without a ar2! the chip inside is with 8 wires and no screw holes holding expansion bay at back,6 screw holes holding the base and 4 underneath if thats any help ps1 pal backups use normal boot no joy at all with usa/jap ps1 backups but ps2 backups boot up ok using dvd region x new version i think,its the one without the dongle have tried all variations and still no joy.....any ideas? craigy
[email protected]