Dallas DS1225Y FRAM conversions

[pinball!]

I'm working on replacing a DS1225Y with an FRAM module on an arcade game. I see they make drop in replacement FRAM adapters to replace the NV SRAM. How are these modules getting around the CE difference between FRAM and SRAM? It would seem to me that it's only possible if by some miracle the CE is so sparsely used. By barely utilizing it, it may enable the CE line to fully reach a logic high between addressing? Or is there some sort of modification that doesn't entirely require reworking the memory controller?

Wanted to see what considerations needed to be had when doing this sort of thing.

[Miti]

Some FRAMs are drop in replacement. Look at FM22L16. Also few simple gates can deal with that, see here:
http://wolfalex.bplaced.net/te/hp3478a/fram/hp3478a_fram.htm

[squadchannel]

FM16/FM18 have that problem, but it fixed problem in FM28V.
i am using FM28V.

[pinball!]

Good to know with the drop ins, I hadn't seen them. I'll have to take a look with a logic analyzer to see what I can get away with. I've seen the FM16s as a direct replacement for SRAM without addressing CE, need to look at how that's being done