You better forget about upgrading the Fastlane from 64 to 256 MB. The knowlage to do the upgrade is lost somewhere in time. Not even DCE or some ex P5 workers know how to do it anymore or have the needed code to programm the GALs that need to be exchanged.
In the end there are only a hand full of "golden" Fastlanes out there (less then 50 maybe even less then 20) that had the upgrade made.
I have been searching for many years. It was much easyer to get the DKB3128 I use instead and that defenitely tells a story.
Anyway if you find a way to do .the upgrade let me know it as I want to break some barriers too (currently 128 MB on MKII, 128 MB on DKB3128, 64 MB on Fastlane and 16 MB on Mobo on miy A3000T adding up to 336 MB FastRAM)
