Very cool scott. I think this may be the first 4-layer H8 board done by a group member? My only recollection of intersecting with bubble memory was a TI silent 700 I used that had some. Seems like it was a “thing” for a pretty short time…?
(There’s quite a pile of H8 boards and JLCPCB boards in the background in that video!)
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It was only on one model: 765. The bubble memory essentially looked like a paper punch to the remote software so you could save downloaded data and files.
If I understood your video you derived the 12V for the bubble via a dc-to-dc converter on the 8V line (so you wouldn’t load down the 18V)? agree if you can find a polulu step up converter that makes sense…
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I remember drooling over bubble memory in the early days - even
before they had stable product. At the time, core memory was still
on peoples mind, and the non-volatile nature was still attractive.
It was an interesting technology, but I think it was just
leap-frogged by "better" technology, like flash and EEPROMs. There
were plenty of problems getting quantity and quality to reasonable
levels, and then newer technology surpassed it. That happens a lot
in our industry, especially for example tape-backup. Seems like
every time someone came out with a bigger and better tape
technology, harddisk would get larger and less expensive causing
the need for larger capacity tape. Tape backup is still used, but
it's no longer required for interchange and a lot of sites will
employ RAID technology as their primary data retention strategy
(with tape serving an archival role).
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WOW! Nicely explained. I felt that I was at the University taking a class. Now, I’m ready for the test/quiz.
Norberto
From: se...@googlegroups.com <se...@googlegroups.com>
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Sent: Sunday, June 4, 2023 4:37 PM
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Subject: [sebhc] H8 Bubble Memory Board
The new "bubble Trouble" board:
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Very nice and well done, Scott!
Norberto
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Date: Saturday, June 10, 2023 at 9:36 AM
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Very nice board! As long is faster than a floppy, then it should be fine. 😊
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