...so, whadda we gots ?
Most bubble memory modules need a lot more special chips to operate. Intel
(72?? chips) and others made them.
If the 256 kByte appears as normal memory in the PC, it can't be real
bubbles. Bubble memory is not real random access per byte, it reads and
writes 'pages' of 128 bytes. For more info see:
http://www.vintagecomputer.net/fjkraan/comp/pc5000/bubble.html
Fred Jan