2.9BSD - /usr/src/ucb/m11/often.m11

   1:         .title  often
   2: 
   3:         ;
   4:         ; these are routines which get called periodically:
   5:         ;
   6:         ;	xctlin		once per line
   7:         ;	xctpas		once per pass
   8:         ;	xctprg		once per program
   9:         ;
  10: 
  11:         .ident  /sept81/
  12: 
  13:         .mcall  (at)always,st.flg
  14:         always
  15:         st.flg
  16:         .globl  xctpas, xctlin, xctprg
  17:         .globl  objsec
  18:         .globl  macdfn
  19: 
  20:         .globl  lst.kb,ioftbl,lstchn, lst.lp
  21:         .globl  lstflg, u.flag
  22:         .globl  io.tty
  23:         .globl  lstdev
  24:         .globl  cradix,pcrcnt
  25: 
  26:         .globl  defttl,chrpnt, setchr,title,endvec
  27: 
  28: .text
  29: xctprg:
  30:         mov     #^pl impure,r0
  31: 1$:     clr     (r0)+
  32:         cmp     r0,#^ph implin
  33:         blo     1$
  34:         call    fixtit
  35:         inc     endvec+6        ;default to no end vector
  36: 
  37:         ;	fall through to
  38: 
  39: xctpas:
  40:         mov     #^pl imppas,r0
  41: 1$:     clr     (r0)+
  42:         cmp     r0,#^ph implin
  43:         blo     1$
  44: 
  45:         comb    objsec          ;force sequence break
  46: 
  47:         mov     #lst.kb*400,r0  ;set error slot
  48:         tstb    ioftbl+lstchn   ;listing device?
  49:         beq     2$              ;  no
  50:         bis     #lst.kb!100200,r0       ;yes, assume teletype
  51:         bit     #io.tty,ioftbl+lstchn   ;true?
  52:         bne     2$              ;  yes
  53:         add     #<lst.lp-lst.kb>*401,r0 ;no, upgrade to lp
  54: 2$:     mov     r0,lstdev       ;set flags
  55: 
  56: 3$:
  57:         mov     #8.,cradix      ;init to octal radix
  58: 
  59:         clr     macdfn
  60:         ;	fall through to
  61: 
  62: xctlin:
  63:         mov     #^pl implin,r0
  64: 1$:     clr     (r0)+
  65:         cmp     r0,#^ph implin
  66:         blo     1$
  67: 
  68:         dec     pcrcnt
  69:         return
  70: 
  71: .globl  fixtit
  72: fixtit:
  73:         mov     #defttl,chrpnt
  74:         call    setchr
  75:         call    title
  76:         return
  77:         .end