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Topic: Bubble memory

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  Bubble memory - Wikipedia, the free encyclopedia
Bubble memory is a type of computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles, which each store one bit of data.
Bubble memory was a very promising technology in the 1970s, but flopped commercially when hard disks proliferated in the 1980s.
Bubble memory is largely the brainchild of a single person, Andrew Bobeck.
en.wikipedia.org /wiki/Bubble_memory   (966 words)

 Bubble System - Wikipedia, the free encyclopedia
It used bubble memory cartridges, a sort of non-mechanical magnetic storage system.
The reason this was implemented was because Bubble Memory had to be heated to around 40-50°C for it to work properly.
Bubble Memory was not a fully developed technology by the time it was used in the Bubble System, and as a result it is currently very rare to find a working Bubble System.
en.wikipedia.org /wiki/Bubble_System   (279 words)

 U.S. Patent: 5103422 - Three-dimensional magnetic memory medium and method for initial setting thereof - April 7, 1992
Therefore, the magnetic bubble of the nth layer is stably held at the position c in a manner that the bubble center is positioned on the line b-c in the close vicinity of the position c.
In this case, the unnecessary magnetic bubbles are selectively eliminated on the basis of difference of the bubble collapse magnetic field due to whether the transfer pattern is presented at the position of the magnetic bubble or not.
The magnetic bubble in the Nth layer is moved to the position (a) or (b) by switching the in-plane magnetic field from the direction+X to the direction-X or vice versa according to the transferred signal.
www.everypatent.com /comp/pat5103422.html   (7408 words)

 TIB0203 Bubble Memory
This bubble memory is much like magnetic tape or magnetic disc memory storage in that it is nonvolatile meaning that the data is retained even when power is no longer applied to the chip.
Bubbles are generated by locally altering the bias field with a magnetic field produced by a pulse of current through a microscopic one-turn metallized loop.
Since the magnetic-bubble memory requires accurate current pulses for the generate, replicate, and transfer operations, an interface circuit called a function driver is needed to convert the digital input control signals to the required current pulses.
www.decodesystems.com /tib0203.html   (2311 words)

 Yet another computer museum - Bubble Memory   (Site not responding. Last check: 2007-10-13)
The presence of a domain (a bubble) is interpreted as a binary 1, and absence of a domain is a zero.
Bubbles are created from electrical signals by a bubble generator within the memory and reconverted to electrical signals by an internal detector.
In disks however, the stored bits are stationary on a moving medium, whereas in the magnetic bubble memory the medium is stationary and the bits move.
www.xs4all.nl /~fjkraan/comp/pc5000/bubble.html   (335 words)

 Interchangeable magnetic bubble memory - Patent 4308593
Because of their shape, these domains are referred to as "bubbles." Generally, the presence of a bubble on the plane signifies a bit value of "1" and the absence of a bubble signifies a bit value of "0".
Bubbles are caused to move from one site to the next by applying a rotating magnetic field such that its vector is always parallel to the garnet plane.
Memory capacity can be expanded and different operating programs can be entered into a terminal by simply swapping devices which would allow for portable magnetic bubble memory devices.
www.freepatentsonline.com /4308593.html   (6665 words)

 Why didn't Bubble memory get popular
Better yet, they needed no moving parts, the field that pushed the bubbles along the surface was generated electrically, whereas media like tape and disk drives had to move the medium under the detectors instead.
The only downside was speed, you had to wait for the bubbles to cycle to the far end of the sheet before they could be read.
Soon, however, bubble memory was a dead end and almost all work on it stopped, as the introduction of higher-density and faster hard disk systems in the early 1980s pretty much killed bubble memory entirely.
www.usedmemory.org /bubble-memory/bubble-memory-module.html   (958 words)

 Parallel access bubble memory - United States Patent 3,990,037
Preferably the bubbles, as they are moved in layer 5 by the customary rotating in-plane magnetic drive field, are stretched by any of the conventional bubble elongation schemes in a direction transverse their direction of movement (as indicated by arrows A), i.e., parallel to the axis of light propagation in the waveguide.
A stretched or expanded magnetic bubble or strip domain is indicated at B as it moves under the light path in the waveguide.
As the passage of a bubble by the light propagation path effects mode conversion of the propagating light in the guide, a light output signal is produced which indicates the passage of each bubble.
xrint.com /patents/us/3990037   (3365 words)

 Resynchronizable bubble memory - Patent 4027283
In such a memory, the magnetic bubbles are typically moved in the thin film by means of a rotating magnetic field acting in conjunction with a pattern of thin-films of Permalloy on the soft magnetic thin film and having special geometric shapes.
One of the main advantages of a bubble memory of this type is that it is non-destructive as far as the data are concerned; however, loop frame synchronization usually depends on the information in the control hardware which is typically Large Scale Implementation (LSI) semiconductor circuitry.
Although this would be a reasonable approach in loop recynchronization in bubble memories, each loop in the memory would require such a header block resulting in a space redundancy and requiring additional logic, making it unattractive, especially when the loops are not big in size.
www.freepatentsonline.com /4027283.html   (3423 words)

 Bubble memory
Bobeck's team soon had 1 cm memories that stored 4,096 bits, the same as a then-standard plane of core memory.
Bubble memory found uses in niche markets through the 80's in systems needing to avoid the higher rates of mechanical failures of disk drives, and in systems operating in high vibration or harsh environments.
The Bubble System required a "warm-up" time of about 20 seconds (prompted by a timer on the screen when switched on) before the game is loaded, as bubble memory needs to be heated to around 30-40В°C to operate properly.
www.mrsci.com /Computer-Memory/Bubble_memory.php   (952 words)

 DriverHeaven.net - Bursting the Athlon 64 Memory bandwidth bubble
It’s safe to say that PC2700 and older memory will not live up to the A64 challenge, starting from PC3200 your system will have all the memory bandwidth it needs to be blistering fast.
Running memory async to the system bus is of course nothing new, but what is new, is the fact that performance between a system running memory async versus one running memory synchronous is virtually non-existent.
A huge difference between the memory tests, which clearly favoured a high clock, and the game tests, which tended to give most of the advantage from the lower latency.
www.driverheaven.net /showthread.php?p=612701   (616 words)

 bubble memory - FOLDOC Definition   (Site not responding. Last check: 2007-10-13)
When a veritcal magnetic field is imposed on this, the areas in opposite alignment to the field shrink to circles, or 'bubbles'.
A bubble can be formed by reversing the field in a small spot, and can be destroyed by increasing the field.
Bubble memory is a kind of non-volatile storage but EEPROM, Flash Erasable Programmable Read-Only Memory and ferroelectric technologies, which are also non-volatile, are faster.
www.nightflight.com /foldoc-bin/foldoc.cgi?bubble+memory   (166 words)

 BU from FOLDOC   (Site not responding. Last check: 2007-10-13)
Because it is not very good relative to other methods and is the one typically stumbled on by naive and untutored programmers, hackers consider it the canonical example of a naive algorithm.
management> A variation of write-through where the cache uses a "write buffer" to hold data being written back to main memory.
Direct Memory Access is a simple form of bus mastering where the I/O device is set up by the CPU to read from or write to one or more contiguous blocks of memory and then signal to the CPU when it has done so.
www.instantweb.com /d/dictionary/foldoc.cgi?query=BU   (4295 words)

 Bubble memory
When a magnetic field is applied to a circular area of this substance that is not magnetized in the same direction, the area is reduced to a smaller circle, or bubble.
During the first stages while bubble memory was released it was widely believed that it would become one of the leading memory technologies, but these promises have not been fulfilled.
Other non-volatile memory types, such as EEPROM, are faster and less expensive.
www.xmission.com /~comphope/jargon/b/bubbleme.htm   (103 words)

 WPS:archives:Intel bubble memory
The Drives are designated C: and D:, leaving A: for the Bubble Memory.
The bubble memory is one of the parts that make the PC-5000 special.
The bubble modules contain apart from the bubble itself some passive components a Hitachi HA16635 IC (30 pins SMD).
www.wps.com /archives/Intel-bubble-memory   (710 words)

 Magnetic Bubble Memory Module With A Thin Media I/O Structure
The chip input output (I/O) assembly components of a magnetic bubble module having a low noise level is shown in Figs.
The flexible substrate 12 has an opening 20 therein suitable for a bubble chip 22 on a ceramic substrate 24 to be positioned thereon.
This type of chip I/O assembly may be used with either an open or a closed bias structure in a bubble module.
www.priorartdatabase.com /IPCOM/000066132   (337 words)

 Fanuc Memory. Fanuc system 6 11 Bubble BMU Memory
Fanuc Bubble memory for fanuc systems 6 and 11 series controls.
Boards and PCBs exchange, repair and tesing services for Fanuc bubbles, are for all size of cards from 16kb, 32kb, 64kb, 128kb, 256kb, 512kb, 1mb, 1.5mb, 2mb ram board and units.
All OEM Fanuc bubble memory unit pcb are available as exstock exchange and are fully tested.
www.dnc-electronics.co.uk /fanuc-system-pcb/repair/memory-exchange.html   (113 words)

 bubble memory - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "bubble memory" is defined.
bubble memory : The American Heritage® Dictionary of the English Language [home, info]
Phrases that include bubble memory: magnetic bubble memory
www.onelook.com /cgi-bin/cgiwrap/bware/dofind.cgi?word=bubble+memory   (166 words)

 Bubble Town, soap bubble fun and magic - Home page
Years ago, I was having too much fun to wonder why this simple device could blow bubbles larger and longer-lived then the little bubble blowing rings.
You don't have to look in cereal boxes for your bubble blowing tube because you can make your own with only two sheets of writing or photocopy paper, masking tape and scissors.
Bubble Trouble is a game of chance, a slim chance that your bubbles will arrive at their destination safe and sound.
www.zurqui.co.cr /crinfocus/bubble/bubble.html   (396 words)

 Fanuc Memory & Ge Fanuc Memory. Our Bubble Memory Upgrade.
We have High Speed Solid State Memory that replaces old Bubble Memory
As most CNCs only have a minimum of part program storage, you may have been forced to split programs or continuously clear Memory.
Memex Memory Engine (MME) upgrade memory capacity and speed for your Fanuc O, Fanuc 6, Fanuc 9, Fanuc 10, Fanuc 11, & Fanuc 12 Series Machine Tool Controls.
www.fanuc.net /memory.html   (255 words)

 Fanuc Memory Upgrade. Fanuc System 6 and 11 replacement Bubble BMU Fanram memory pcb
Fanuc memory upgrades for fanuc systems requiring more memory.
DNC have original fanuc bubble memory boards and fanuc fanram memory boards which replace them, if it is not listed here then go to fanuc memory exchange repair
We are not affiliated to: GE Fanuc, Fanuc, or any companies products.
dnc-electronics.co.uk /fanuc-system-pcb/pcbs-parts-surplus/memory.html   (94 words)

 magnetic bubble memory - yourDictionary.com - American Heritage Dictionary   (Site not responding. Last check: 2007-10-13)
magnetic bubble memory - yourDictionary.com - American Heritage Dictionary
A memory that stores data in the form of bubbles, or circular areas, on a thin film of magnetic silicate.
No longer used in most computers, magnetic bubble memory is similar to RAM but does not lose the stored information when the computer is turned off.
www.yourdictionary.com /ahd/m/m0029000.html   (66 words)

 bubble memory - Find, Compare, and Buy bubble memory at Shopping.com
bubble memory - Find, Compare, and Buy bubble memory at Shopping.com
Tell us why our search results for bubble memory were not helpful.
The results did not include what I was searching for.
www.shopping.com /xGS-bubble_memory   (125 words)

 What is bubble memory? - A Word Definition From the Webopedia Computer Dictionary
You are in the: Small Business Computing Channel
It was once widely believed that bubble memory would become one of the leading memory technologies, but these promises have not been fulfilled.
Other non-volatile memory types, such as EEPROM, are both faster and less expensive than bubble memory.
www.webopedia.com /TERM/B/bubble_memory.html   (115 words)

 Hardware Analysis - Forum - Bursting the Athlon 64 Memory bandwidth bubble
Here is just a little review i found that some of us might like concerning amd' 64's memory bandwidth
Yep it looks like value ram and a nice cpu are you need when it comes to amd 64 cpu's
DDR reads data on both the "rising and falling" edges of the clock, hence PC-3200 is actually 200Mhz but is 400Mhz "effictive".
www.hardwareanalysis.com /content/topic/44095   (1311 words)

 Bubble Memory - Compare Prices, Reviews and Buy at NexTag - Price - Review
Bubble Memory - Compare Prices, Reviews and Buy at NexTag - Price - Review
Canon I900D Photo Printer with Butil-In Memory Card Slots
Last updated: June 11, 2006 16:42 1564483206 v1x5 810341671
www.nextag.com /bubble-memory/search-html   (62 words)

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