8080

from The Free On-line Dictionary of Computing (8 July 2008)
Intel 8080
8080

   <processor> The successor to the {Intel 8008}.  The 8080 had a
   16-bit {address bus} and an 8-bit {data bus}.  It had seven
   8-bit {registers} (six which could also be combined as three
   16-bit registers), a 16-bit {stack pointer} to memory which
   replaced the 8008's internal stack and a 16-bit {program
   counter}.  It also had 256 I/O ports (so I/O devices could be
   connected without needing to allocate any addressing space as
   is required for {memory mapped} devices) and a signal pin that
   allowed the {stack} to occupy a separate bank of memory.

   Shortly after the 8080, the {Motorola 6800} was introduced.

   [Date?]

   (1994-10-31)
    

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