Thrift store finds - test-drb@ccmp.vtda.org

10 Nov 1998

...
  One expansion slot (I don't know what kind, but =
it allowed for a video card so you could drive a second display, =
and a commonly-found configuration is an SE driving a giant =
grayscale two-page display).  
It's a PDS (Processor Direct Slot). As the name implies, a way to 
connect something directly to the processor. This means that the card 
that can be plugged in depends on the processor, and also that designing 
such a card isn't as pleasant as for ISA or S-100 or others.

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