implementing a shared memory multiprocessor system

Hi all;

Did anyone try to implement a shared memory multiprocessor system (from *standard components*, not to design my own SoC)? Any ideas where one could obtain a multiport memory of a decent size? (>128MB say?) The best (and only) I could find is:

https://www.cypress.com/?id=82&addcols=&filter_19=36+Mb#parametric

which is still too small for any serious data sharing ... it seems more suited for some kind of synchronization in DSP, or something ...

Currently my only (reasonable) idea is to put an FPGA between processors and and make a memory controller from it, but I'd love to hear other possibilities.

I would avoid communication interfaces if possible, among processors on one board ... (if I ever sit down to really make one ... )

thanks!
ranko

p.s. if this is not clear enough, a somewhat long (and more detailed) message I posted can be found at

https://e2e.ti.com/forums/p/12179/47401.aspx#47401

since I'm thinking about using that processor ...