Article ID : S500006923 / Last Modified : 11/04/2018Print

What are the standards for the Card and Socket Services?

    What are Card and Socket Services ?

    Q. What is a PC Card?
    A. PC Card is a credit-card sized removable module made for portable computers. The cards are "Plug and Plug" ready and are standardized by PCMCIA and also known as "PCMCIA cards."
    PC Cards are 16-bit devices that are used to attach modems, network adapters, sound cards, radio transceivers, solid state disks and hard disks to a portable computer.

    Q. What is the size of a PC Card?
    A. All PC Cards are 85.6 mm long by 54 mm wide (3.37" x 2.126") and use a 68-pin connector.

    Q. How many types of PC cards are there in the market?
    A. There are 3 types.
    * Type I card (The original PC Card)
    It is 3.3 mm thick and is typically used to hold memory.
    * Type II cards
    It is 5.0 mm thick and are commonly used for memory, modems and LAN adapters in laptops.
    * Type III cards
    It is 10.5 mm thick and are used to hold a hard disk, wireless transceiver or other peripheral that needs more space.

    The Type III slot can hold two Type II cards.

    Q. What are Card and Socket Services?
    A. In order to use a PC Card slot in the computer, Card and Socket services must be loaded, typically at system startup. Card and Socket Services software is generally included with laptops that have PC Card slots. It also comes packaged with PC Cards.
    Card Services manage system resources that are required by the PC Card. It also manages the PCs and determines which IRQs, memory and I/O addresses are to be assigned. They also manage hot swapping and pass changes in events to higher-level drivers written for specific cards.

    For more information, visit