Bubble Boards

[Louis Ohland]

https://archive.org/details/PC_Tech_Journal_vol03_n05/page/n124/mode/1up

128KB, 256KB, and 512KB of screamin' fizzy bubbles. And you thought beer
had the only kind of bubbles you were interested in....

Advanced Digital Information Corp. MBM-504 (512KB) Bubble Board
Helix Systems and Development Corp. Helix PC Bubble Disk
Pure Data Ltd. PDIB-512 Bubble Board

[Louis Ohland]

https://archive.org/details/bitsavers_DigitalDesN06198106_53178344/page/26/mode/1up

Seems to do a more thorough job of explaining how they work at board
level...

Note: I did not sleep at Holiday Inn Express last night.

[Louis Ohland]

https://archive.org/details/bitsavers_S100Micros_125456438/page/n57/mode/1up?q=bubble+memory

Building a magnetic bubble memory system’s easier than you think. Here
are the complete hardware and software details.

[Louis Ohland]

https://archive.org/details/electronic_design-1980_03_01/page/102/mode/1up?q=bubble+memory