I started with 2K, (the "minimal" Acorn Atom). I expanded the memory 1K at a time to the maximum of 12K of RAM. Two chips for each 1K. I can still remember w

I started with 2K, (the "minimal" Acorn Atom). I expanded the memory 1K at a time to the maximum of 12K of RAM. Two chips for each 1K. I can still remember which ones: code "2114", 300ns static RAM chips, 4 bits x 1024 (hence needing two chips per K).