Hi all,
I'm building an eprom emulator using a Ramtron parallel f-ram (FM1808). 
The emulated eprom is a 2716.
I read the eprom datasheet but only when i traced the read operation 
with the scope I understood how it really works :-(
The eprom doesn't need for any clock pulse like the f-ram so i'm in trouble.
The eprom programmer just put low the /EP pin and change the addresses 
waiting an appropriate time before reading out the data bits.
So i need to build an Address Transition Detector that generates a pulse 
when the address lines changes.

If the application was only an emulator for a "simple" eprom programmer 
that read and write from the start to the end it would be simple: the 
changing edge of A0 (lowest order bit of address) is enough.
But this apparatus must substitute the eprom in a very old machine where 
the data is read randomly.
Any thought or component suggestion?
Thanks
       Nicola


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