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. The claSSic example waS the EBCDIC-vS.-ASCII bit (#12) of the Program StatuS Word of the IBM 360. Another waS the bit on a PDP-12 that controlled whether it ran the PDP-8 or the LINC inStruction Set. [Jargon File]

Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS:
[ 2 ] [ = ] [ ad ] [ ag ] [ ai ] [ al ] [ am ] [ an ] [ ar ] [ arc ] [ arg ] [ AS ] [ aS ] [ ASCII ] [ at ] [ B ] [ b ] [ BC ] [ BCD ] [ be ] [ bi ] [ bit ] [ bo ] [ boot ] [ C ] [ CD ] [ ch ] [ ci ] [ cl ] [ claSS ] [ claSSic ] [ co ] [ con ] [ control ] [ D ] [ de ] [ diff ] [ do ] [ DP ] [ du ] [ E ] [ EBCDIC ] [ ec ] [ ed ] [ ee ] [ er ] [ era ] [ eS ] [ et ] [ fi ] [ file ] [ flag ] [ fr ] [ ge ] [ gr ] [ h ] [ hang ] [ hardware ] [ hat ] [ hr ] [ IBM ] [ IBM 360 ] [ IC ] [ id ] [ iff ] [ il ] [ in ] [ inStruction Set ] [ io ] [ it ] [ J ] [ Jargon File ] [ la ] [ lag ] [ ld ] [ Lex ] [ li ] [ life ] [ ly ] [ M ] [ ma ] [ mo ] [ mod ] [ mode ] [ module ] [ mp ] [ N ] [ na ] [ NC ] [ ng ] [ nl ] [ nn ] [ no ] [ nS ] [ om ] [ op ] [ PD ] [ PDP ] [ pe ] [ ph ] [ phaSe ] [ pl ] [ pr ] [ program ] [ query ] [ rc ] [ re ] [ ro ] [ ru ] [ S ] [ SC ] [ SCI ] [ Se ] [ Set ] [ Si ] [ St ] [ Struct ] [ Su ] [ T ] [ th ] [ tr ] [ troll ] [ tt ] [ tw ] [ ua ] [ up ] [ uS ] [ ve ] [ Word ]