Given how hard it is to find those SRAMs, it might be
easier to make a
daughter card that fits into the CPU socket that has a JEDEC SRAM socket
(for a 6116, 6264, 62256...), and use A15 as a low-true enable to put it
below $8000.
2114s are hard to find? Are they some weird variant (speed, power)?
William Donzelli
aw288(a)osfn.org