As usually the schematics were available in the manual it was not too hard to add some additional static ram. There were unused address lines available which could be used for chip select.
a) Do these inode issues also happen with the supplied (v4) kernel?
b) Do these inode issues also happen with a rebuilded kernel which uses the original lib1 and lib2?
I once had strange effects on V6 if lib1 and/or lib2 were rebuild by me.