Movatterモバイル変換


[0]ホーム

URL:


Jump to content
WikipediaThe Free Encyclopedia
Search

JEIDA memory card

From Wikipedia, the free encyclopedia
Memory card format
This articleneeds additional citations forverification. Please helpimprove this article byadding citations to reliable sources. Unsourced material may be challenged and removed.
Find sources: "JEIDA memory card" – news ·newspapers ·books ·scholar ·JSTOR
(May 2021) (Learn how and when to remove this message)
IBM IC DRAM card in aThinkPad 360PE

TheJEIDA memory card standard is a popular memory card standard at the beginning of memory cards appearing on portable computers.JEIDA cards could be used to expand system memory[1] or as a solid-state storage drive.

History

[edit]

Before the advent of the JEIDA standard, laptops had proprietary cards that were not interoperable with other manufacturers laptops, other laptop lines, or even other models in the same line. The establishment of the JEIDA interface and cards across Japanese portables provoked a response from the US government, throughSEMATECH,[citation needed] and thusPCMCIA was born. PCMCIA and JEIDA worked to solve this rift between the two competing standards, and merged intoJEIDA 4.0 orPCMCIA 1.0 in 1990.

Usage

[edit]

The JEIDA memory card was used in earlierThinkPad models, whereIBM branded them asIC DRAM Cards.[2][3]

The interface has also been used inSRAM cards.[4]

Versions

[edit]
  • Version 1.0 is an 88-pin[5][6] memory card. It has 2 rows of pin holes which are shifted against each other by half the pin spacing. The card is 3.3mm thick. Released in 1986.[7]
  • Version 2.0 is only mechanically compatible with the Version 1.0 card. Version 1.0 cards fail in devices designed for Version 2.0. Released in 1987.[7]
  • Version 3 is a 68-pin memory card. It is also used in theNeo Geo.[citation needed] Released in 1989 and has variants with 20, 34, 40 and 68 pins.[7]
  • Version 4.0 corresponds with 68-pinPCMCIA 1.0 (1990).[8]
  • Version 4.1 unified the PCMCIA and JEIDA standards asPCMCIA 2.0. v4.1 is the 16-bitPC Card standard that defines Type I, II, III, and IV card sizes.
  • Version 4.2 is thePCMCIA 2.1 standard, and introducedCardBus' 32-bit interface in an almost physically identical casing.

See also

[edit]

References

[edit]
  1. ^"PC Mag". Ziff Davis, Inc. October 27, 1992 – via Google Books.
  2. ^Martignano, M.; Harboe-Sorensen, R. (December 1995). "IBM Thinkpad radiation testing and recovery during EUROMIR missions".IEEE Transactions on Nuclear Science.42 (6):2004–2009.Bibcode:1995ITNS...42.2004M.doi:10.1109/23.489246.ISSN 0018-9499.
  3. ^"IC DRAM Card - ThinkWiki".Thinkwiki. Retrieved2021-05-12.
  4. ^"PCMCIA / JEIDA SRAM Card"(PDF). Archived fromthe original(PDF) on 2020-11-12. Retrieved2021-05-11.
  5. ^"Memory options from IBM".groups.csail.mit.edu.
  6. ^"PC Mag". Ziff Davis, Inc. December 22, 1992 – via Google Books.
  7. ^abchttps://www.cqpub.co.jp/hanbai/books/49/49971/49971_1syo.pdf[bare URL PDF]
  8. ^Anderson, Don; Inc, MindShare (January 25, 1995).PCMCIA System Architecture: 16-bit PC Cards. Addison-Wesley Professional.ISBN 978-0-201-40991-8 – via Google Books.{{cite book}}:|last2= has generic name (help)

External links

[edit]
Main articles
Top: CF, SD, Memory Stick Pro Duo, xD card; Bottom: MicroSD, Memory Stick Micro (M2)
Types
Stub icon

Thiscomputer hardware article is astub. You can help Wikipedia byexpanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=JEIDA_memory_card&oldid=1307939414"
Categories:
Hidden categories:

[8]ページ先頭

©2009-2025 Movatter.jp