370/ESA Architecture
In the 1990s IBM introduced 370/ESA architecture (later named 390/ESA and finally ESA/390 or System/390, in short S/390), completing the evolution to full 31-bit virtual addressing and keeping this addressing mode flag. These later architectures support more than 2 GiB of physical memory and support multiple concurrent address spaces up to 2 GiB each in size. As of mid-2006 there still are not too many programs unduly constrained by this multiple 31-bit addressing mode.
Read more about this topic: 31-bit
Famous quotes containing the word architecture:
“They can do without architecture who have no olives nor wines in the cellar.”
—Henry David Thoreau (1817–1862)