beq	3f
	cmp	r1,$'A
	blo	3f
	cmp	r1,$'Z
	bhi	3f
	add	$40,r1
3:
	movb	tty+3(r0),0f
	jsr	r0,putc; 0:.. / put char on input clist
		br 2f
	bitb	$10,tty+4(r0) / echo
	bne	4f / branch echo bit set
	cmp	r1,$12
	bne	3f
	bitb	$20,tty+4(r0) / cr
	beq	3f
4:
	cmp	r1,$4 / is char input an eot
	beq	1f
	mov	r1,-(sp) / put char on stack
	movb	tty+3(r0),0f
	inc	0f
	jsr	r0,putc; 0:.. / put char just input on output clist
		br .+2
	jsr	r0,starxmt
	mov	(sp)+,r1
3:
	bitb	$40,tty+4(r0) / raw
	bne	1f / branch if raw bit set
	cmp	r1,$12
	beq	1f
	movb	tty+3(r0),r1
	cmpb	cc(r1),$15.
	blo	2f
1:
	movb	tty+3(r0),0f
	jsr	r0,wakeup; runq; 0:.. / call wakeup for process
2:
	jmp	retisp  
txmt:
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
	jsr	r0,1f
1:
	mov	r1,-(sp)
	mov	r2,-(sp)
	mov	r3,-(sp)
	mov	clockp,-(sp)
	mov	$s.syst+2,clockp
	sub	$txmt+4,r0 / 0%4 / offset in cc