z/Architecture Overview

• 64 bit addressing

  • 24 bit support
  • 31 bit support
  • Up to 3 levels of “Region Tables” to give:
    • 42, 53, 64 bit addressing
  • Use samxx instruction to switch addressing modes

• New term:

  • >16MB = “above-the-line”
  • >2GB = “above-the-bar”

Previous slide

Next slide

Back to first slide

View graphic version