that would be 4 4bit ram chips and a 4 bit real time clock.…

Twetch ·

that would be 4 4bit ram chips and a 4 bit real time clock. https://pdf1.alldatasheet.com/datasheet-pdf/view/11260/OKI/M6242B.html

https://www.datasheets360.com/pdf/4860874684510284726