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300 static void screen_up(struct ite_softc *ip, int top, int bottom, int lines)
309 	printf("screen_up %d %d %d ->",top,bottom,lines);
313 	if (top >= bottom)
316 	if (top + lines >= bottom)
318 		ulowell_clear (ip, top, 0, bottom - top, ip->cols);
324 	cmd[2] = top			* ip->ftheight;	/* y */
326 	cmd[4] = (bottom-top+1)		* ip->ftheight;	/* h */
328 	cmd[6] = (top-lines)  		* ip->ftheight;	/* dst y */
334 static void screen_down(struct ite_softc *ip, int top, int bottom, int lines)
343 	printf("screen_down %d %d %d ->",top,bottom,lines);
348 	if (top >= bottom)
351 	if (top + lines >= bottom)
353 	    ulowell_clear (ip, top, 0, bottom - top, ip->cols);
359 	cmd[2] = top			* ip->ftheight;	/* y */
361 	cmd[4] = (bottom - top - lines)	* ip->ftheight;	/* h */
363 	cmd[6] = (top + lines)		* ip->ftheight;	/* dst y */
366 	ulowell_clear(ip, top, 0, lines, ip->cols);