The numbers on the Prime memory are: ART3572 REV E /
PCB3573-001 REV E
Did a little more looking at the photos. This is a 1 MB board,
configured as 512k x 22 bits (16 bits user accessible, the rest for
ECC). It may support (or _require_) interleaving memory accesses across
two boards.
Based on the chips, I think the part number for this board is probably
12512-E8 or 7615-902, rather than one of the later designs. The sticker
might say MMW1-E8.
De