Forgot to add that the 32bit PC-Card interface is also called 'Cardbus'.
Many (most?) laptops with this interface have an additional feature called 'Zoomed Video' built into one of the PC-Card/Cardbus slots.
ZV provides the ability to capture full screen video, TV tuner & video capture. It's a form of extra electronics that allow bus mastered video processing. This off-loads the CPU & speeds up things.