It's theoretically possible but almost certainly not worth the effort. Those 30-pin SIMMs are typically around 1M*8bits, which means at least 10 address lines and 8 data lines, plus about 4 control signals. You can use fewer than all the bits, and less than all the memory, and shift registers or latches, but you're still looking at having to explicitly move data in and out in software; there is NO way to just attach them and have them show up as extra RAM (for example.)