I just picked up an SE/30 and it came with a mystery expansion card . . . it is marked with MoDAM SE030 Rev C  1989 Memory Plus, and has a DB 9 port.  Anyone have an idea what this thing might be? Is it useful?  Does it need drivers? Unfortunately, the SE/30 has a dead hard drive, so there are no clues there as to what it may be. Thanks!