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It depends on the size of the address bus, which is often different than the size of the data bus.

  • If the address bus were 8 bits, then you could address 256 locations.
  • If the address bus were 16 bits, such as in the 8085, then you could address 65,536 locations.
  • If the address bus were 20 bits, such as in the 8086/8088, then you can address 1,048,576 locations.
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