Related:

• SPSW Scramble Processor Status Word
• SSW: Scramble Status Word
• Proposed Additions to the PDP-11 Instruction Se
• RPSW: Randomize Program Status Word
• PPSW: Pack Program Status Word
• SSB: Scramble Status Byte
• mode bit n. [common] A flag, usually in hardware, that selects between two (usually quite different) modes of operation.
  The connotations are different from flag bit in that mode bits are mainly written during a boot or set-up phase, are seldom explicitly read, and seldom change over the lifetime of an ordinary program....
• mode bit: n. A {flag}, usually in hardware, that selects between two (usually quite different) modes of operation.
  The connotations are different from {flag} bit in that mode bits are mainly written during a boot or set-up phase, are seldom explicitly read, and seldom change over the lifetime of an ordinary program....
• flag n. [very common] A variable or quantity that can take on one of two value
  a bit, particularly one that is used to indicate one of two outcomes or is used to control which of two things is to be done....