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IBM IC DRAM card in a ThinkPad 360PE

The JEIDA 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.


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, through SEMATECH,[citation needed] and thus PCMCIA was born. PCMCIA and JEIDA worked to solve this rift between the two competing standards, and merged into JEIDA 4.0 or PCMCIA 1.0 in 1990.


The JEIDA memory card was used in earlier ThinkPad models, where IBM branded them as IC DRAM Cards.[2][3]

The interface has also been used in SRAM cards.[4]


See also


  1. ^ Inc, Ziff Davis (October 27, 1992). "PC Mag". Ziff Davis, Inc. – via Google Books. ((cite web)): |last= has generic name (help)
  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. doi:10.1109/23.489246. ISSN 0018-9499.
  3. ^ "IC DRAM Card - ThinkWiki". Thinkwiki. Retrieved 2021-05-12.
  4. ^ "PCMCIA / JEIDA SRAM Card" (PDF).
  5. ^ "Memory options from IBM".
  6. ^ Inc, Ziff Davis (December 22, 1992). "PC Mag". Ziff Davis, Inc. – via Google Books. ((cite web)): |last= has generic name (help)
  7. ^ a b c
  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)