What are CardBus and Zoomed Video?
CardBus is the 32-Bit version of PC Card technology. Enabled in the February 1995 release of the PC Card Standard (and generally available in systems built in 1997 or later), CardBus allows speeds of up to 133 Mbps at 33MHz. CardBus cards are not backward-compatible to 16-bit hosts, however, 16-bit cards are backward compatible with CardBus hosts. Zoomed Video is a connection between a PC Card and host system that allows the card to write video data directly to the VGA controller. The data is transferred with no buffering requirements because it is transferred over the ZV bus and not the system bus. Much more information on CardBus and Zoomed Video can be found in the PC Card Primer. How can I tell if I have a CardBus card? When viewing the PC Card right side up, the area above the 68-pin connector on a CardBus card will have a gold grounding shield strip across it, typically with 8 small metal bumps (see photo below). This strip is necessary to prevent signal noise from interfering wi
