z.2FVSE DOS/360 and successors



ibm released z/vse 3.1 in 2005. change in naming reflected new system z branding ibm s mainframe product line, did not represent fundamental change in architecture vse/esa 2.7 preceded it. in particular, did not support new 64-bit z/architecture, running in 31-bit mode on 64-bit capable machines. z/vse 4.1 released in 2007 introduced support 64-bit real addressing, 8gb of memory. however, while parts of supervisor run in 64-bit mode, provides 31-bit virtual address spaces problem state applications. of 2011 1 estimate placed number of sites using z/vse @ around 4000.








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