.title	often

	;
	; these are routines which get called periodically:
	;
	;	xctlin		once per line
	;	xctpas		once per pass
	;	xctprg		once per program
	;

	.ident	/sept81/

	.mcall	(at)always,st.flg
	always
	st.flg
	.globl	xctpas, xctlin, xctprg
	.globl	objsec
	.globl	macdfn

	.globl	lst.kb,ioftbl,lstchn, lst.lp 
	.globl	lstflg, u.flag
	.globl	io.tty
	.globl	lstdev
	.globl	cradix,pcrcnt
	
	.globl	defttl,chrpnt, setchr,title,endvec

.text
xctprg:
	mov	#^pl impure,r0
1$:	clr	(r0)+
	cmp	r0,#^ph implin
	blo	1$
	call	fixtit
	inc	endvec+6	;default to no end vector

	;	fall through to

xctpas:
	mov	#^pl imppas,r0
1$:	clr	(r0)+
	cmp	r0,#^ph implin
	blo	1$

	comb	objsec		;force sequence break

	mov	#lst.kb*400,r0	;set error slot
	tstb	ioftbl+lstchn	;listing device?
	beq	2$		;  no
	bis	#lst.kb!100200,r0	;yes, assume teletype
	bit	#io.tty,ioftbl+lstchn	;true?
	bne	2$		;  yes
	add	#<lst.lp-lst.kb>*401,r0	;no, upgrade to lp
2$:	mov	r0,lstdev	;set flags

3$:
	mov	#8.,cradix	;init to octal radix
	
	clr	macdfn
	;	fall through to

xctlin:
	mov	#^pl implin,r0
1$:	clr	(r0)+
	cmp	r0,#^ph implin
	blo	1$

	dec	pcrcnt
	return

.globl	fixtit
fixtit:
	mov	#defttl,chrpnt
	call	setchr
	call	title
	return
	.end