Need help with IDA and operand offsets

Originally posted by Ecmhacker
Creating ram and register segments over 500mb away from the binary really screws up the ability to scroll though the screen

Try to use "Alignment" (button 'L') at the start of RAM area. Select the maximum alignment. It will reduce big number of bytes to one string.

I still can't help you with offsets ('FFFF...' instead of 'FF...'). And I dont't understand it fully. Could you give me some Info (or links) about this controller (e.g. assembler spec., memory). I'll try to understand what really must be in code and will search the ways of troubleshooting it in IDA.
And more. Could you say me, pleae, what parameters of RAM and ROM (addresses and sizes) should be set when IDA opens this file.
Thank you.