I'm glad to see the work your doing and that's all great stuff, especially the SCSI gear. To clarify exactly what I want to do. I have the original EMU expansion board complete with 2MB. My emax is 2MB so clearly if I installed that board and did the scrambled megs via EPR I would get 4MB. Also I have all the additional ram required to make the unit 8MB by installing the extra 32 chips on the expansion board. After reading all the available upgrade literature from EMU and further checking. It would appear that once you get beyond 4MB you don't need to add or remove any Pals or wire links from the expansion board. If I understand correctly all the non volatile information such as memory size and boot order is stored on the 8 pin eeprom on the main board. If this chip was desoldered, socketed and replaced with the correct 8MB version. I can't see why is should not just work. The floppy would have just run some software that programmed the eeprom with the new memory size. Clearly that's why they made it self corrupt to save people just doing it as and when they fancy. My aim is to make this work and keep a spare eeprom to swap out thus saving me having to both rely on and pay a third party. If anyone can help with this then please contact me.
Regards
Tony