In article <smiths.722004482@p4.cs.man.ac.uk> smiths@p4.cs.man.ac.uk (Little SteeeveS) writes:
>A few months ago there was a lot of talk in this group of increasing
> the speed of A310's by replacing the RAM and using a faster crystal
> to clock the machine.
>
>Last Christmas I upgraded my machine to 4Megs (by Craddock Ltd ) and so
> I find myself thinking on these lines...
>In a 4 meg upgrade I believe the old RAM is discarded and completely replaced. Therefore this 4meg is quite modern RAM. Is it therfore capable of going faster?
>i.e. can I whip out my 8MHz crystal and replace it with a 12Mhz one? ( I assume the new Riscos 3 ROMS will survive this but will the new RAM).
I think you can't do this, because the I/O in the machine still has to run
at 8MHz. The newer machines (A5000, A540) have extra circuitry to
synchronise the 12MHz memory with 8MHz I/O. (Or something along those