I'm thinking about trying to emulate an 8080 in an AVR, but the largest one I know of has 32K sram (xmega384c3). I've tried messing with external bus interface memory, and I wonder about SPI based external memory although performance is possibly a concern there.
If I just used the 384c3, then I could probably dedicate 24K of its SRAM to the emulator usage, but if I really wanted 64K of SRAM what directions would you guys go/recommend?
I know picking a stm32 or something with enough sram to begin with is probably more ideal, but I like 8 bit AVR's and would prefer to use one if I can.