2006-02-20 Thomas Schwinge <tschwinge@gnu.org>

Remove unused and unsupported code.  Consult the file
	`DEVELOPMENT' for details.  Partly based on suggestions by
	Gianluca Guida <glguida@gmail.com>.

	* chips/atm.c: Remove file.
	* chips/atmreg.h: Likewise.
	* chips/audio.c: Likewise.
	* chips/audio_config.h: Likewise.
	* chips/audio_defs.h: Likewise.
	* chips/bt431.c: Likewise.
	* chips/bt431.h: Likewise.
	* chips/bt455.c: Likewise.
	* chips/bt455.h: Likewise.
	* chips/bt459.c: Likewise.
	* chips/bt459.h: Likewise.
	* chips/bt478.c: Likewise.
	* chips/bt478.h: Likewise.
	* chips/build_font.c: Likewise.
	* chips/cfb_hdw.c: Likewise.
	* chips/cfb_misc.c: Likewise.
	* chips/dc503.c: Likewise.
	* chips/dc503.h: Likewise.
	* chips/dtop.h: Likewise.
	* chips/dtop_handlers.c: Likewise.
	* chips/dtop_hdw.c: Likewise.
	* chips/dz_7085.h: Likewise.
	* chips/dz_defs.h: Likewise.
	* chips/dz_hdw.c: Likewise.
	* chips/eccreg.h: Likewise.
	* chips/fb_hdw.c: Likewise.
	* chips/fb_misc.c: Likewise.
	* chips/fdc_82077.h: Likewise.
	* chips/fdc_82077_hdw.c: Likewise.
	* chips/frc.c: Likewise.
	* chips/ims332.c: Likewise.
	* chips/ims332.h: Likewise.
	* chips/isdn_79c30.h: Likewise.
	* chips/isdn_79c30_hdw.c: Likewise.
	* chips/kernel_font.c: Likewise.
	* chips/kernel_font.data: Likewise.
	* chips/lance.c: Likewise.
	* chips/lance.h: Likewise.
	* chips/lance_mapped.c: Likewise.
	* chips/lk201.c: Likewise.
	* chips/lk201.h: Likewise.
	* chips/mc_clock.c: Likewise.
	* chips/mc_clock.h: Likewise.
	* chips/mouse.c: Likewise.
	* chips/nc.c: Likewise.
	* chips/nc.h: Likewise.
	* chips/nw.h: Likewise.
	* chips/nw_mk.c: Likewise.
	* chips/nw_mk.h: Likewise.
	* chips/pm_defs.h: Likewise.
	* chips/pm_hdw.c: Likewise.
	* chips/pm_misc.c: Likewise.
	* chips/scc_8530.h: Likewise.
	* chips/scc_8530_hdw.c: Likewise.
	* chips/screen.c: Likewise.
	* chips/screen.h: Likewise.
	* chips/screen_defs.h: Likewise.
	* chips/screen_switch.c: Likewise.
	* chips/screen_switch.h: Likewise.
	* chips/serial_console.c: Likewise.
	* chips/serial_defs.h: Likewise.
	* chips/sfb_hdw.c: Likewise.
	* chips/sfb_misc.c: Likewise.
	* chips/spans.c: Likewise.
	* chips/spans.h: Likewise.
	* chips/tca100.c: Likewise.
	* chips/tca100.h: Likewise.
	* chips/tca100_if.c: Likewise.
	* chips/tca100_if.h: Likewise.
	* chips/vs42x_rb.h: Likewise.
	* chips/xcfb_hdw.c: Likewise.
	* chips/xcfb_misc.c: Likewise.
	* chips/xcfb_monitor.h: Likewise.
	* Makefile.in (chips-files): Only contain `busses.c' and `busses.h'.
	* kern/syscall_sw.c: Don't include <chips/nw_mk.h> anymore.

1 files changed, 0 insertions, 1103 deletions

diff --git a/chips/screen.c b/chips/screen.c
deleted file mode 100644
index 2251281..0000000
--- a/chips/screen.c
+++ /dev/null
@@ -1,1103 +0,0 @@
-/* 
- * Mach Operating System
- * Copyright (c) 1991,1990,1989 Carnegie Mellon University
- * All Rights Reserved.
- * 
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- * 
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- * 
- * Carnegie Mellon requests users of this software to return to
- * 
- *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
- *  School of Computer Science
- *  Carnegie Mellon University
- *  Pittsburgh PA 15213-3890
- * 
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-/*
- *	File: screen.c
- * 	Author: Alessandro Forin, Robert V. Baron, Joseph S. Barrera,
- *		at Carnegie Mellon University
- *	Date:	9/90
- *
- *	Generic Screen Driver routines.
- */
-
-#include <bm.h>
-#if	NBM > 0
-#include <dtop.h>
-
-#include <machine/machspl.h>		/* spl definitions */
-#include <chips/screen_defs.h>
-
-#include <chips/lk201.h>
-
-#include <mach/std_types.h>
-#include <sys/time.h>
-#include <kern/time_out.h>
-#include <device/io_req.h>
-
-#include <vm/vm_map.h>
-#include <device/ds_routines.h>
-#include <machine/machspl.h>
-
-#define	Ctrl(x) ((x)-'@')
-
-#define	SCREEN_BLITC_NORMAL		0
-#define	SCREEN_BLITC_ROW		1
-#define	SCREEN_BLITC_COL		2
-
-#define	SCREEN_ASCII_INVALID	'\0'	/* ascii_screen not valid here */
-
-struct screen_softc screen_softc_data[NBM];
-struct screen_softc *screen_softc[NBM];
-
-short screen_console = 0;
-
-/* Forward decls */
-
-void screen_blitc(
-	int	unit,
-	register unsigned char c);
-
-void screen_blitc_at(
-	register screen_softc_t	sc,
-	unsigned char		c,
-	short 			row,
-	short 			col);
-
-
-/*
- 8-D	A "Screen" has a bitmapped display, a keyboard and a mouse
- *
- */
-
-#if NDTOP > 0
-extern int 	dtop_kbd_probe(), dtop_set_status(), dtop_kbd_reset(),
-		dtop_ring_bell();
-#endif /* NDTOP */
-extern int 	lk201_probe(), lk201_set_status(), lk201_reset(),
-		lk201_ring_bell();
-
-struct kbd_probe_vector {
-	int	(*probe)();
-	int	(*set_status)();
-	int	(*reset)();
-	int	(*beep)();
-} kbd_vector[] = {
-#if NDTOP > 0
-	{dtop_kbd_probe, dtop_set_status, dtop_kbd_reset, dtop_ring_bell},
-#endif
-	{lk201_probe, lk201_set_status, lk201_reset, lk201_ring_bell},
-	{0,}
-};
-
-screen_find_kbd(int unit)
-{
-	struct kbd_probe_vector *p = kbd_vector;
-
-	for (; p->probe; p++) {
-		if ((*p->probe) (unit)) {
-			screen_softc[unit]->kbd_set_status = p->set_status;
-			screen_softc[unit]->kbd_reset = p->reset;
-			screen_softc[unit]->kbd_beep = p->beep;
-			return 1;
-		}
-	}
-	return 0;
-}
-
-/*
- * The screen probe routine looks for the associated
- * keyboard and mouse, at the same unit number.
- */
-screen_probe(int unit)
-{
-	if (unit >= NBM)
-		return 0;
-	screen_softc[unit] = &screen_softc_data[unit];	
-	if (!screen_find())
-		return 0;
-	if (!screen_find_kbd(unit))
-		return 0;
-	mouse_probe(unit);
-	return 1;
-}
-
-screen_softc_t
-screen(int unit)
-{
-	return screen_softc[unit];
-}
-
-/*
- * This is an upcall from the specific display
- * hardware, to register its descriptor
- */
-screen_attach(
-	int	unit,
-	char	**hwp)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	sc->hw_state = hwp;
-	sc->blitc_state = SCREEN_BLITC_NORMAL;
-}
-
-/*
- * This is another upcall (for now) to register
- * the user-mapped information
- */
-void
-screen_up(
-	int		unit,
-	user_info_t	*screen_data)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	sc->up = screen_data;
-	mouse_notify_mapped(unit, unit, screen_data);
-	screen_event_init(screen_data);
-	ascii_screen_initialize(sc);
-}
-
-/*
- * Screen saver
- */
-#define SSAVER_MIN_TIME (2*60)	/* Minimum fade interval 		*/
-long ssaver_last = 0;	/* Last tv_sec that the keyboard was touched 	*/
-long ssaver_time = 0;	/* Number of seconds before screen is blanked	*/
-
-void
-ssaver_bump(int unit)
-{
-	register long tnow = time.tv_sec;
-
-	if ((tnow - ssaver_last) > ssaver_time)
-		screen_on_off(unit, TRUE);
-	ssaver_last = tnow;
-}
-
-void
-screen_saver(int unit)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	/* wakeup each minute */
-	timeout(screen_saver, unit, hz * 60);
-	if ((time.tv_sec - ssaver_last) >= ssaver_time)
-		/* this does nothing if already off */
-		screen_on_off(unit, FALSE);
-}
-
-/*
- * Screen open routine.  We are also notified
- * of console operations if our screen is acting
- * as a console display.
- */
-screen_open(
-	int		unit,
-	boolean_t	console_only)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	/*
-	 * Start screen saver on first (console) open
-	 */
-	if (!ssaver_time) {
-		ssaver_time = 10*60;		/* 10 minutes to fade	*/
-		ssaver_bump(unit);			/* .. from now		*/
-		screen_saver(unit);		/* Start timer		*/
-	}
-	/*
-	 * Really opening the screen or just notifying ?
-	 */
-	if (!console_only) {
-#if 0
-		(*sc->sw.init_colormap)(sc);
-#endif
-		screen_event_init(sc->up);
-		ascii_screen_initialize(sc);
-		(*sc->sw.graphic_open)(sc->hw_state);
-		sc->mapped = TRUE;
-	}
-}
-
-/*
- * Screen close
- */
-screen_close(
-	int		unit,
-	boolean_t	console_only)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	/*
-	 * Closing of the plain console has no effect
-	 */
-	if (!console_only) {
-		user_info_t	*up = sc->up;
-
-		screen_default_colors(up);
-		/* mapped info, cursor and colormap resetting */
-		(*sc->sw.graphic_close)(sc);
-
-		/* turn screen on, and blank it */
-		screen_on_off(unit, TRUE);
-		ascii_screen_initialize(sc);
-		(*sc->sw.clear_bitmap)(sc);
-
-		/* position cursor circa page end */
-		up->row = up->max_row - 1;
-		up->col = 0;
-
-		/* set keyboard back our way */
-		(*sc->kbd_reset)(unit);
-		lk201_lights(unit, LED_OFF);
-
-		sc->mapped = FALSE;
-	}
-}
-
-screen_default_colors(
-	user_info_t	*up)
-{
-	register int	i;
-
-	/* restore bg and fg colors */
-	for (i = 0; i < 3; i++) {
-		up->dev_dep_2.pm.Bg_color[i] = 0x00;
-		up->dev_dep_2.pm.Fg_color[i] = 0xff;
-	}
-}
-
-/*
- * Write characters to the screen
- */
-screen_write(
-	int			unit,
-	register io_req_t	ior)
-{
-	register int		count;
-	register unsigned char	*data;
-	vm_offset_t		addr;
-
-	if (unit == 1)	/* no writes to the mouse */
-		return D_INVALID_OPERATION;
-
-	data  = (unsigned char*) ior->io_data;
-	count = ior->io_count;
-	if (count == 0)
-		return (D_SUCCESS);
-
-	if (!(ior->io_op & IO_INBAND)) {
-		vm_map_copy_t copy = (vm_map_copy_t) data;
-		kern_return_t kr;
-
-		kr = vm_map_copyout(device_io_map, &addr, copy);
-		if (kr != KERN_SUCCESS)
-			return (kr);
-		data = (unsigned char *) addr;
-	}
-
-	/* Spill chars out, might fault data in */
-	while (count--)
-		screen_blitc(unit, *data++);
-
-	if (!(ior->io_op & IO_INBAND))
-		(void) vm_deallocate(device_io_map, addr, ior->io_count);
-
-	return (D_SUCCESS);
-}
-
-/*
- * Read from the screen.  This really means waiting
- * for an event, which can be either a keypress on
- * the keyboard (or pointer) or a mouse movement.
- * If there are no available events we queue the
- * request for later.
- */
-queue_head_t screen_read_queue = { &screen_read_queue, &screen_read_queue };
-boolean_t    screen_read_done();
-
-screen_read(
-	int			unit,
-	register io_req_t	ior)
-{
-	register user_info_t	*up = screen_softc[unit]->up;
-	register spl_t		s = spltty();
-
-	if (up->evque.q_head != up->evque.q_tail) {
-		splx(s);
-		return (D_SUCCESS);
-	}
-	ior->io_dev_ptr = (char *) up;
-	ior->io_done = screen_read_done;
-	enqueue_tail(&screen_read_queue, (queue_entry_t) ior);
-	splx(s);
-	return (D_IO_QUEUED);
-}
-
-boolean_t
-screen_read_done(
-	register io_req_t	ior)
-{
-	register user_info_t *up = (user_info_t *) ior->io_dev_ptr;
-	register spl_t    s = spltty();
-
-	if (up->evque.q_head != up->evque.q_tail) {
-		splx(s);
-		(void) ds_read_done(ior);
-		return (TRUE);
-	}
-	enqueue_tail(&screen_read_queue, (queue_entry_t) ior);
-	splx(s);
-	return (FALSE);
-}
-
-static
-screen_event_posted(
-	register user_info_t	*up)
-{
-	if (up->evque.q_head != up->evque.q_tail) {
-		register io_req_t	ior;
-		while ((ior = (io_req_t)dequeue_head(&screen_read_queue)))
-			iodone(ior);
-	}
-}
-
-boolean_t compress_mouse_events = TRUE;
-
-/*
- * Upcall from input pointer devices
- */
-screen_motion_event(
-	int	unit,
-	int	device,
-	int	x,
-	int	y)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-	register user_info_t	*up = sc->up;
-	register unsigned	next;
-	unsigned int		ev_time;
-
-	/*
-	 * Take care of scale/threshold issues
-	 */
-	if (device == DEV_MOUSE) {
-		register int	scale;
-
-		scale = up->mouse_scale;
-
-		if (scale >= 0) {
-			register int		threshold;
-			register boolean_t	neg;
-
-			threshold = up->mouse_threshold;
-
-			neg = (x < 0);
-			if (neg) x = -x;
-			if (x >= threshold)
-				x += (x - threshold) * scale;
-			if (neg) x = -x;
-
-			neg = (y < 0);
-			if (neg) y = -y;
-			if (y >= threshold)
-				y += (y - threshold) * scale;
-			if (neg) y = -y;
-
-		}
-
-		/* we expect mices in incremental mode */
-		x += up->mouse_loc.x;
-		y += up->mouse_loc.y;
-
-	} else if (device == DEV_TABLET) {
-
-		/* we expect tablets in absolute mode */
-		x = (x * up->dev_dep_2.pm.tablet_scale_x) / 1000;
-		y = ((2200 - y) * up->dev_dep_2.pm.tablet_scale_y) / 1000;
-	
-	} /* else who are you */
-
-	/*
-	 * Clip if necessary
-	 */
-	{
-		register int		max;
-
-		if (x > (max = up->max_cur_x))
-			x = max;
-		if (y > (max = up->max_cur_y))
-			y = max;
-	}
-
-	/*
-	 * Did it actually move
-	 */
-	if ((up->mouse_loc.x == x) &&
-	    (up->mouse_loc.y == y))
-		return;
-
-	/*
-	 * Update mouse location, and cursor
-	 */
-	up->mouse_loc.x = x;
-	up->mouse_loc.y = y;
-
-	screen_set_cursor(sc, x, y);
-
-	/*
-	 * Add point to track.
-	 */
-	{
-		register screen_timed_point_t	*tr;
-
-		/* simply add and overflow if necessary */
-		next = up->evque.t_next;
-		if (next >= MAX_TRACK)
-			next = MAX_TRACK-1;
-		tr		= &up->point_track[next++];
-		up->evque.t_next = (next == MAX_TRACK) ? 0 : next;
-
-		ev_time 	= (unsigned) approx_time_in_msec();
-		tr->time	= ev_time;
-		tr->x		= x;
-		tr->y		= y;
-	}
-
-	/*
-	 * Don't post event if mouse is within bounding box,
-	 * Note our y-s are upside down
-	 */
-	if (y <  up->mouse_box.bottom &&
-	    y >= up->mouse_box.top &&
-	    x <  up->mouse_box.right &&
-	    x >= up->mouse_box.left)
-		return;
-	up->mouse_box.bottom = 0;	/* X11 wants it ? */
-
-	/*
-	 * Post motion event now
-	 */
-#define round(x)	((x) & (MAX_EVENTS - 1))
-	{
-		register unsigned int	head = up->evque.q_head;
-		register unsigned int	tail = up->evque.q_tail;
-		register screen_event_t	*ev;
-
-		if (round(tail + 1) == head)	/* queue full, drop it */
-			return;
-
-		/* see if we can spare too many motion events */
-		next = round(tail - 1);
-		if (compress_mouse_events &&
-		    (tail != head) && (next != head)) {
-			ev = & up->event_queue[next];
-			if (ev->type == EVT_PTR_MOTION) {
-				ev->x 		= x;
-				ev->y		= y;
-				ev->time	= ev_time;
-				ev->device	= device;
-				screen_event_posted(up);
-				return;
-			}
-		}
-		ev		= & up->event_queue[tail];
-		ev->type	= EVT_PTR_MOTION;
-		ev->time	= ev_time;
-		ev->x		= x;
-		ev->y		= y;
-		ev->device	= device;
-
-		/* added to queue */
-		up->evque.q_tail = round(tail + 1);
-	}
-
-	/*
-	 * Wakeup any sleepers
-	 */
-	screen_event_posted(up);
-}
-
-/*
- * Upcall from keypress input devices
- * Returns wether the event was consumed or not.
- */
-boolean_t
-screen_keypress_event(
-	int	unit,
-	int	device,
-	int	key,
-	int	type)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-	register user_info_t	*up = sc->up;
-	register unsigned int	head, tail;
-	register screen_event_t	*ev;
-
-	if (!sc->mapped) {
-		int col, row;
-
-		if (device != DEV_MOUSE)
-			return FALSE;
-		/* generate escapes for mouse position */
-		col = up->mouse_loc.x / 8;
-		row = up->mouse_loc.y / 15;
-		mouse_report_position(unit, col, row, key, type);
-		return TRUE;
-	}
-
-	head = up->evque.q_head;
-	tail = up->evque.q_tail;
-
-	if (round(tail + 1) == head)	/* queue full */
-		return TRUE;
-
-	ev		= & up->event_queue[tail];
-	ev->key		= key;
-	ev->type	= type;
-	ev->device	= device;
-	ev->time 	= approx_time_in_msec();
-	ev->x		= up->mouse_loc.x;
-	ev->y		= up->mouse_loc.y;
-
-	up->evque.q_tail = round(tail + 1);
-
-	screen_event_posted(up);
-
-	return TRUE;
-}
-#undef	round
-
-/*
- * Event queue initialization
- */
-screen_event_init(
-	user_info_t	*up)
-{
-	up->evque.q_size = MAX_EVENTS;
-	up->evque.q_head = 0;
-	up->evque.q_tail = 0;
-;	up->evque.t_size = MAX_TRACK;
-	up->evque.t_next = 0;
-	up->evque.timestamp = approx_time_in_msec();
-
-}
-
-/*
- * Set/Get status functions.
- * ...
- */
-io_return_t
-screen_set_status(
-	int		unit,
-	dev_flavor_t	flavor,
-	dev_status_t	status,
-	natural_t	status_count)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-	register user_info_t	*up = sc->up;
-	io_return_t		ret = D_SUCCESS;
-
-/* XXX checks before getting here */
-
-	switch (flavor) {
-
-	case SCREEN_INIT:
-		ascii_screen_initialize(sc);
-		break;
-
-	case SCREEN_ON:
-		screen_on_off(unit, TRUE);
-		break;
-
-	case SCREEN_OFF:
-		screen_on_off(unit, FALSE);
-		break;
-
-	case SCREEN_FADE: {
-		register int tm = * (int *) status;
-
-		untimeout(screen_saver, unit);	/* stop everything and 	   */
-		if (tm == -1) 			/* don't reschedule a fade */
-			break; 
-		if (tm < SSAVER_MIN_TIME)
-			tm = SSAVER_MIN_TIME;
-		ssaver_time = tm;
-		ssaver_bump(unit);
-		screen_saver(unit);
-		break;
-	}
-
-	case SCREEN_SET_CURSOR: {
-		screen_point_t		*loc = (screen_point_t*) status;
-
-		if (status_count < sizeof(screen_point_t)/sizeof(int))
-			return D_INVALID_SIZE;
-
-		sc->flags |= SCREEN_BEING_UPDATED;
-		up->mouse_loc = *loc;
-		sc->flags &= ~SCREEN_BEING_UPDATED;
-
-		screen_set_cursor(sc, loc->x, loc->y);
-
-		break;
-	}
-
-	/* COMPAT: these codes do nothing, but we understand */
-	case _IO('q', 8):	/* KERNLOOP */
-	case _IO('q', 9):	/* KERNUNLOOP */
-	case _IO('g', 21):	/* KERN_UNLOOP */
-		break;
-
-	/*
-	 * Anything else is either device-specific,
-	 * or for the keyboard
-	 */
-	default:
-		ret = (*sc->sw.set_status)(sc, flavor, status, status_count);
-		if (ret == D_INVALID_OPERATION)
-			ret = (*sc->kbd_set_status)(unit, flavor,
-						    status, status_count);
-		break;
-	}
-	return ret;
-}
-
-io_return_t
-screen_get_status(
-	int		unit,
-	dev_flavor_t	flavor,
-	dev_status_t	status,
-	natural_t	*count)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	if (flavor == SCREEN_STATUS_FLAGS) {
-		*(int *)status	= sc->flags;
-		*count		= 1;
-		return D_SUCCESS;
-	} else if (flavor == SCREEN_HARDWARE_INFO) {
-		screen_hw_info_t	*hinfo;
-
-		hinfo = (screen_hw_info_t*)status;
-		hinfo->frame_width = sc->frame_scanline_width;
-		hinfo->frame_height = sc->frame_height;
-		hinfo->frame_visible_width = sc->frame_visible_width;
-		hinfo->frame_visible_height = sc->frame_visible_height;
-		*count = sizeof(screen_hw_info_t)/sizeof(int);
-		return D_SUCCESS;
-	} else
-
-		return (*sc->sw.get_status)(sc, flavor, status, count);
-}
-
-/*
- * Routine to handle display and control characters sent to screen
- */
-void
-screen_blitc(
-	int	unit,
-	register unsigned char c)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-	register user_info_t	*up = sc->up;
-	register unsigned char	*ap;
-	register int i;
-
-	/*
-	 * Handle cursor positioning sequence
-	 */
-	switch (sc->blitc_state) {
-	case SCREEN_BLITC_NORMAL:
-		break;
-
-	case SCREEN_BLITC_ROW:
-		c -= ' ';
-		if (c >= up->max_row) {
-			up->row = up->max_row - 1;
-		} else {
-			up->row = c;
-		}
-		sc->blitc_state = SCREEN_BLITC_COL;
-		return;
-
-	case SCREEN_BLITC_COL:
-		c -= ' ';
-		if (c >= up->max_col) {
-			up->col = up->max_col - 1;
-		} else {
-			up->col = c;
-		}
-		sc->blitc_state = SCREEN_BLITC_NORMAL;
-		goto move_cursor;
-	}
-
-	c &= 0xff;
-
-	/* echo on rconsole line */
-	rcputc(c);
-
-	/* we got something to say, turn on the TV */
-	ssaver_bump(unit);
-
-	switch (c) {
-						/* Locate cursor*/
-	case Ctrl('A'):				/* ^A -> cm	*/
-		sc->blitc_state = SCREEN_BLITC_ROW;
-		return;
-
-						/* Home cursor  */
-	case Ctrl('B'):				/* ^B -> ho	*/
-		up->row = 0;
-		up->col = 0;
-		break;
-
-						/* Clear screen */
-	case Ctrl('C'):				/* ^C -> cl	*/
-		up->row = 0;
-		up->col = 0;
-		(*sc->sw.clear_bitmap)(sc);
-		break;
-
-						/* Move forward */
-	case Ctrl('D'):				/* ^D -> nd	*/
-		screen_advance_position(sc);
-		break;
-
-						/* Clear to eol */
-	case Ctrl('E'):				/* ^E -> ce	*/
-		ap = &sc->ascii_screen[up->max_col*up->row + up->col];
-		for (i = up->col; i < up->max_col; i++, ap++) {
-			if (sc->standout || *ap != ' ') {
-				if (sc->standout) {
-					*ap = SCREEN_ASCII_INVALID;
-				} else {
-					*ap = ' ';
-				}
-				screen_blitc_at(sc, ' ', up->row, i);
-			}
-		}
-		return;
-
-						/* Cursor up 	*/
-	case Ctrl('F'):				/* ^F -> up	*/
-		if (up->row != 0) up->row--;
-		break;
-
-	case Ctrl('G'):				/* ^G -> bell	*/
-		(*sc->kbd_beep)(unit);
-		return;
-
-						/* Backspace	*/
-	case Ctrl('H'):				/* ^H -> bs	*/
-		if (--up->col < 0)
-			up->col = 0;
-		break;
-
-	case Ctrl('I'):				/* ^I -> tab	*/
-		up->col += (8 - (up->col & 0x7));
-		break;
-
-	case Ctrl('J'):				/* ^J -> lf	*/
-		if (up->row+1 >= up->max_row)
-			(*sc->sw.remove_line)(sc, 0);
-		else
-			up->row++;
-		break;
-
-						/* Start rev-video */
-	case Ctrl('K'):				/* ^K -> so	*/
-		sc->standout = 1;
-		return;
-
-						/* End rev-video */
-	case Ctrl('L'):				/* ^L -> se	*/
-		sc->standout = 0;
-		return;
-
-	case Ctrl('M'):				/* ^M -> return	*/
-		up->col = 0;
-		break;
-
-						/* Save cursor position */
-	case Ctrl('N'):				/* ^N -> sc	*/
-		sc->save_col = up->col;
-		sc->save_row = up->row;
-		return;
-
-						/* Restore cursor position */
-	case Ctrl('O'):				/* ^O -> rc	*/
-		up->row = sc->save_row;
-		up->col = sc->save_col;
-		break;
-
-						/* Add blank line */
-	case Ctrl('P'):				/* ^P -> al	*/
-		(*sc->sw.insert_line)(sc, up->row);
-		return;
-
-						/* Delete line	*/
-	case Ctrl('Q'):				/* ^Q -> dl	*/
-		(*sc->sw.remove_line)(sc, up->row);
-		return;
-
-	default:
-		/*
-		 * If the desired character is already there, then don't
-		 * bother redrawing it. Always redraw standout-ed chars,
-		 * so that we can assume that all cached characters are
-		 * un-standout-ed. (This could be fixed.)
-		 */
-		ap = &sc->ascii_screen[up->max_col*up->row + up->col];
-		if (sc->standout || c != *ap) {
-			if (sc->standout) {
-				*ap = SCREEN_ASCII_INVALID;
-			} else {
-				*ap = c;
-			}
-			screen_blitc_at(sc, c, up->row, up->col);
-		}
-		screen_advance_position(sc);
-		break;
-	}
-
-move_cursor:
-	screen_set_cursor(sc, up->col*8, up->row*15);
-
-}
-
-
-/*
- * Advance current position, wrapping and scrolling when necessary
- */
-screen_advance_position(
-	register screen_softc_t	sc)
-{
-	register user_info_t	*up = sc->up;
-
-	if (++up->col >= up->max_col) {
-		up->col = 0 ;
-		if (up->row+1 >= up->max_row) {
-			(*sc->sw.remove_line)(sc, 0);
-		} else {
-			up->row++;
-		}
-	}
-}
-
-
-/*
- * Routine to display a character at a given position
- */
-void
-screen_blitc_at(
-	register screen_softc_t	sc,
-	unsigned char		c,
-	short 			row,
-	short 			col)
-{
-	/*
-	 * Silently ignore non-printable chars
-	 */
-	if (c < ' ' || c > 0xfd)
-		return;
-	(*sc->sw.char_paint)(sc, c, row, col);
-}
-
-/*
- * Update sc->ascii_screen array after deleting ROW
- */
-ascii_screen_rem_update(
-	register screen_softc_t	sc,
-	int	row)
-{
-	register user_info_t	*up = sc->up;
-	register unsigned int	col_w, row_w;
-	register unsigned char	*c, *end;
-
-	/* cache and sanity */
-	col_w	= up->max_col;
-	if (col_w > MaxCharCols)
-		col_w = MaxCharCols;
-	row_w	= up->max_row;
-	if (row_w > MaxCharRows)
-		row_w = MaxCharRows;
-
-	/* scroll up */
-	c	= &sc->ascii_screen[row * col_w];
-	end	= &sc->ascii_screen[(row_w-1) * col_w];
-	for (; c < end; c++)		/* bcopy ? XXX */
-		*c = *(c + col_w);
-
-	/* zero out line that entered at end */
-	c	= end;
-	end	= &sc->ascii_screen[row_w * col_w];
-	for (; c < end; c++)
-		*c = ' ';
-
-}
-
-/*
- * Update sc->ascii_screen array after opening new ROW
- */
-ascii_screen_ins_update(
-	register screen_softc_t	sc,
-	int	row)
-{
-	register user_info_t	*up = sc->up;
-	register unsigned int	col_w, row_w;
-	register unsigned char	*c, *end;
-
-	/* cache and sanity */
-	col_w	= up->max_col;
-	if (col_w > MaxCharCols)
-		col_w = MaxCharCols;
-	row_w	= up->max_row;
-	if (row_w > MaxCharRows)
-		row_w = MaxCharRows;
-
-	/* scroll down */
-	c	= &sc->ascii_screen[row_w * col_w - 1];
-	end	= &sc->ascii_screen[(row + 1) * col_w];
-	for (; c >= end; c--)
-		*c = *(c - col_w);
-
-	/* zero out line that entered at row */
-	c	= end - 1;
-	end	= &sc->ascii_screen[row * col_w];
-	for (; c >= end; c--)
-		*c = ' ';
-}
-
-/*
- * Init charmap
- */
-ascii_screen_fill(
-	register screen_softc_t	sc,
-	char	c)
-{
-	register user_info_t	*up = sc->up;
-	register int i, to;
-
-	to = up->max_row * up->max_col;
-	for (i = 0; i < to; i++) {
-		sc->ascii_screen[i] = c;
-	}
-}
-
-ascii_screen_initialize(
-	register screen_softc_t	sc)
-{
-	ascii_screen_fill(sc, SCREEN_ASCII_INVALID);
-}
-
-/*
- * Cursor positioning
- */
-screen_set_cursor(
-	register screen_softc_t	sc,
-	register int x,
-	register int y)
-{
-	register user_info_t	*up = sc->up;
-
-	/* If we are called from interrupt level..  */
-	if (sc->flags & SCREEN_BEING_UPDATED)
-	       return;
-	sc->flags |= SCREEN_BEING_UPDATED;
-	/*
-	 * Note that that was not atomic, but this is
-	 * a two-party game on the same processor and
-	 * not a real parallel program.
-	 */
-
-	/* Sanity checks (ignore noise) */
-	if (y < up->min_cur_y || y > up->max_cur_y)
-		y = up->cursor.y;
-	if (x < up->min_cur_x || x > up->max_cur_x)
-		x = up->cursor.x;
-
-	/*
-	 * Track cursor position
-	 */
-	up->cursor.x = x;
-	up->cursor.y = y;
-
-	(*sc->sw.pos_cursor)(*(sc->hw_state), x, y);
-
-	sc->flags &= ~SCREEN_BEING_UPDATED;
-}
-
-screen_on_off(
-	int		unit,
-	boolean_t	on)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-
-	if (sc->sw.video_on == 0)	/* sanity */
-		return;
-
-	if (on)
-		(*sc->sw.video_on)(sc->hw_state, sc->up);
-	else
-		(*sc->sw.video_off)(sc->hw_state, sc->up);
-}
-
-screen_enable_vretrace(
-	int		unit,
-	boolean_t	on)
-{
-	register screen_softc_t	sc = screen_softc[unit];
-	(*sc->sw.intr_enable)(sc->hw_state, on);
-}
-
-/*
- * For our purposes, time does not need to be
- * precise but just monotonic and approximate
- * to about the millisecond.  Instead of div/
- * mul by 1000 we div/mul by 1024 (shifting).
- *
- * Well, it almost worked. The only problem
- * is that X somehow checks the time against
- * gettimeofday() and .. turns screen off at
- * startup if we use approx time. SO we are
- * back to precise time, sigh.
- */
-approx_time_in_msec()
-{
-#if 0
-	return ((time.seconds << 10) + (time.microseconds >> 10));
-#else
-	return ((time.seconds * 1000) + (time.microseconds / 1000));
-#endif
-}
-
-/*
- * Screen mapping to user space
- * This is called on a per-page basis
- */
-screen_mmap(
-	int		dev,
-	vm_offset_t	off,
-	int		prot)
-{
-	/* dev is safe, but it is the mouse's one */
-	register screen_softc_t	sc = screen_softc[dev-1];
-
-	(*sc->sw.map_page)(sc, off, prot);
-}
-
-#endif	NBM > 0