Compaq Presario R4000 Hardware-Software Guide - Page 106
What Is an ExpressCard?, Selecting an ExpressCard - express card
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PC Cards and ExpressCards What Is an ExpressCard? An ExpressCard is a next-generation, high-performance PC Card. Like standard PC Cards, ExpressCards are designed to conform to the standard specifications of the Personal Computer Memory Card International Association (PCMCIA). An ExpressCard cannot be used in standard PC Card slot. An ExpressCard slot is available on select models. Selecting an ExpressCard ExpressCards use one of 2 interfaces and are available in 2 sizes. The ExpressCard slot supports both interfaces and both sizes. For example, you can use ■ An ExpressCard with either a USB interface or a PCI Express interface. ■ A full-size ExpressCard, called ExpressCard/54 1, or a smaller ExpressCard, called ExpressCard/34 2. The ExpressCard procedures described in the following sections are the same for both interfaces and both sizes. Hardware and Software Guide 6-5