System requirements

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High Level Assembler runs under these operating systems. Unless otherwise stated, the assembler also operates under subsequent versions, releases, and modification levels of these systems:
  • OS/390® Version 2 Release 10.0 (5647-A01)
  • VM/ESA Version 3 Release 1.0 (5654-A17)
  • z/VM® Version 5 Release 2 (5741-A05)
  • VSE/ESA Version 2 Release 6 (5690-VSE)
  • z/VSE® Version 3 Release 1 andVersion 4 (5686-CF8)
  • z/OS® Version 1 Release 2.0 (5694-A01)
High Level Assembler supports the operation codes available with the following mode processors:
  • Extended Architecture (370-XA)
  • Enterprise Systems Architecture/370 (ESA/370)
  • Enterprise Systems Architecture/390 (ESA/390)
  • z/Architecture®