I'm glad I entrusted this board to you.
I didn't have 60ns RAM so I searched for a 4MbSIMM as junk and installed it, but it only recognized it as a 1MbSIMM. You found out from your article that it was due to the number of RAM chips.
I had a GeminiULTRA 25Mhz before, but at the time I didn't know...