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thanks man...anyway, about this Aladdin...i had an XT installed when i first picked up my machine, before i started modding. it would boot reliably but freeze randomly, far too often for it to be playable. i also had no IGR, and rebooting through dash meant booting M$ kernel, not Evox M8+16. i tried a bunch of different BIOSes and it didn't pan out too well - Yoshihiro for example just gave me a black screen. i got fed up and replaced it with a Xenium - success on first boot.
probably got a 1.6b, the early XTs had issues with eh cheap RAM, since been fixed, but unfixed clones still abound, i think the biggest trick with aladdins to know where to buy them, lol not sure about the IGR, i never fully trusted an evox bios with IGR, lol
and yeah, you need a SPDT switch, you can make do with a SPST, but its damned inconvenient IMO, youll only be able to use a very old hacked bios (x2 7972) and be careful not to flash in the "off" position or youll flash the entire TSOP