TITLE
    Performa 600: Difference Between Accelerator and NuBus Slots
Article ID:
Created:
Modified: 		10994
11/4/92
11/11/92
TOPIC



    What is the difference between the Accelerator and NuBus Slots in the
    Performa 600?

DISCUSSION


    NuBus Slots
    -----------
    The NuBus slots of the Performa 600 are designed to accommodate networking,
    video, and other expansion cards. Expansion cards in NuBus slots are restricted
    to run at the clock speed of the NuBus, which is 10 MHz.

    Accelerator Slot
    ----------------
    The Accelerator slot of the Performa 600 is a 120-pin slot that is designed
    to accommodate a CPU accelerator card. The slot is directly connected to the
    microprocessor and doesn't have any restrictions on its clock speed. An
    accelerator card, which functionally replaces the microprocessor, must be able
    to run at high speed and cannot run in a NuBus slot, which is restricted to
    10 MHz.

    Note that the Performa 600's Accelerator slot signals are a subset of the
    Macintosh IIci cache connector slot. Processor address, data and some control
    signals are provided, but cache control signals are NOT provided. Cache cards,
    such as the Macintosh IIci cache card, will not work in the Performa 600's
    Accelerator slot.




Document Information
Product Area: Computers
Category: Macintosh Performa 200 through 640 Series
Sub Category: Macintosh Performa 600

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