IBM 5280 Distributed Data System - Index of

,Main Storage AddressingMain storage is divided into 64 K byte sections referred to as pages. There can be amaximum of 160 K bytes of main storage.MaximumStorageSizePage 0Page 1Page 2}64 K Bytesl64 K Bytes32 K BytesA partition cannot cross a page boundary, and therefore cannot be greater than64 K bytes in length. Each byte within a partition can be uniquely addressed with16 bits, from hex 0000 to FFFF.Although the common area is always located on page 0, a partition may be on anymain storage page.When an application program addresses an area outside the partition, a 4-bit pagenumber precedes the 16-bit storage address. This 20-bit address is used when apartition addresses an area within the common area.4