What are the expansion options for the mid-range Macintosh Quadra computers?
On the mid-range Macintosh Quadra computers, Apple provided several expansion options. One type of expansion slot on all these computers is the processor-direct slot (PDS). The PDS allows expansion cards to have direct access to the processor. Video, network and accelerator cards, among others, have been created for the PDS slots in Macintosh Quadra models. Note: Because different Macintosh computers use different processors, there are several implementations of the processor-direct slot; not all PDS cards are compatible with the different PDS types. To ensure compatibility, contact the manufacturer of any PDS card you plan to use. An additional NuBus expansion slot is present in the Macintosh Quadra/Centris 650 and Macintosh Quadra 700 computers. NuBus is a standard designed by Texas Instruments. It features self-configuration and bus-mastering on a 32 data-bit card. Bus-mastering means a card can take control of the bus, which allows for multi-processor computing. The card self-confi
