Well I'm not 100% sure but I think there are eight (8) 256k bank modes, four (4) 512k, two (2) 1024 <-- THATS WHAT YOUR USING, and one (1) 2048 Here is another way of writing it:
Bank Modes:
256k/256k/256k/256k/256k/256k/256k/256k/
512k/512k/512k/512k/
1024k/1024k/
2048k/
There is only 2mb (2048k) of space on the X3 so you cannot have 1 256k bank and 2 1024k banks... I think you can mix and match the amounts though... as long as you dont go above 2048k. Again I'm not 100% sure about this however.
As for the switches part. I do not know anything about the 256k modes but I belive the 512k modes to be:
On Off Off Off On -->That would be bank 1 of the 512k.
Off On Off Off On -->That would be bank 2 of the 512k.
And so on...
As for the 1024k modes I know it is like this:
On On Off Off On -->That would be bank 1 of the 1024k.
Off Off On On On -->That would be bank 2 of the 1024k.
As for the 2048 I think it is:
On On On On On -->The only bank for the 2048k.
I really dont know much about the switches, but I do know that they control the diffrent banks the X3 loads.
Someone who has more than one bios on their X3 should be able to help more.
Hope this helps, and I know its kinda long :shock: .