CardBus is the latest enhancement to the PCMCIA 5.0 or later. PMCIA stands for Personal Computer Memory Card International Association. CardBus was introduced in 1995 and has been present in laptops from late 1997 onward. The main purpose of CardBus was to extend the existing PCMCIA bus to allow more powerful devices and provide support for 32 Bit I/O. CardBus includes bus mastering, which allows a controller on the bus to talk to other devices or memory without going through the CPU. CardBus also can operate at speeds up to 33MHz.
Most new slots are compatible with both CardBus and the original 16-bit PC Card devices. CardBus cards are easy to identify as they have an extra gold-colored metal strip on the end of the card. This is an extra shielding required because of the faster data transfer, unlike PC Card slots.
An ExpressCard is an interface to allow peripheral devices to be connected to a computer, usually a laptop computer. ExpressCards is a hardware standard replacing PC cards or PCMCIA cards.
PCMCIA is the short for Personal Computer Memory Card International Association. It is pronounced as separate letters. PCMCIA is also known as PC Card.
PCMCIA was originally designed for adding memory to portable computers, the PCMCIA standard has been expanded several times and is now suitable for many types of devices
The primary advantage of AGP over PCI is that it provides a dedicated pathway between the slot and the processor rather than sharing the PCI bus. In addition to a lack of contention for the bus, the point-to-point connection allows for higher clock speeds.
PCI-X is the upgraded version of PCI. It differs mainly in the fact that the PCI-X bus is 64-bits wide, and runs at higher frequencies of up to 533MHz, compared to PCI frequency that runs up to 66MHz.
AGP Pro was launched in 1998 as an AGP interface extension specification for advanced workstations. AGP Pro bus is a specification that provides a direct connection between the graphics adapter and memory.
ISA is an old technology that has been replaced by PCI, PCIe and so on. ISA slots are usually black, long and the gold contacts are large.
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