360 Assembly/360 Instructions/LPSW

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LPSW - ? - Opcode 82 - Privileged Instruction

Example usage[edit]



The LPSW instruction is available on all models. It is a privileged instruction.

Purpose of Instruction[edit]

This instruction allows a privileged program to load the entire contents of the PSW from a location. The typical usage would be for an Operating System to set up the next task to run, or to return control to a problem program after completing processing of a Supervisor Call

Typical Usage[edit]


This is a privileged instruction, and is available on thw 360 only. LPSWE is used on 370 and z/System.

Exceptions and Faults[edit]

  • Privileged Operation
  • Invalid Opcode (370 and z/System)
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