> I don't think you can.  The SIMM slots in SE/30, IIx, and IIcx (these
> are close siblings) take 256k, 1M, 4M, or 16M SIMMs.
> 

     Thank you for saving me from a most embaressing expendature.  :) 
Though, I believe that the 8MB SIMMs are compounds of the 4MB, just like
the 2MB SIMMs are compounds of the 1MB SIMMs.  And I thought that the 2MB
SIMMs worked OK...?

                                                   Jaime