I think this was originally a Nascom design but when NASCOM eventually disappeared it ended up as a Gemini component. It housed four banks of four EPROMS each and a 8k BASIC ROM position. Each of the four EPROM banks could be selected as either 2708 (1k x 8) or 2716 (2k x 8) types.Like the RAM (B) board described elsewhere this board also supported the
paging system.