--- Gnu-Mach/xen/console.c	2020/09/02 04:47:55	1.1.1.2
+++ Gnu-Mach/xen/console.c	2020/09/02 04:54:20	1.1.1.4
@@ -116,8 +116,8 @@ static void hypcnintr(int unit, spl_t sp
 		mb();
 		console->in_cons++;
 #if	MACH_KDB
-		if (c == (char)'£') {
-			printf("£ pressed\n");
+		if (c == (char)0xA3) {
+			printf("pound pressed\n");
 			kdb_kintr();
 			continue;
 		}
@@ -129,14 +129,14 @@ static void hypcnintr(int unit, spl_t sp
 	simple_unlock(&inlock);
 }
 
-int hypcnread(int dev, io_req_t ior)
+int hypcnread(dev_t dev, io_req_t ior)
 {
 	struct tty *tp = &hypcn_tty;
 	tp->t_state |= TS_CARR_ON;
 	return char_read(tp, ior);
 }
 
-int hypcnwrite(int dev, io_req_t ior)
+int hypcnwrite(dev_t dev, io_req_t ior)
 {
 	return char_write(&hypcn_tty, ior);
 }
@@ -207,7 +207,7 @@ int hypcnopen(dev_t dev, int flag, io_re
 	return (char_open(dev, tp, flag, ior));
 }
 
-int hypcnclose(int dev, int flag)
+void hypcnclose(dev_t dev, int flag)
 {
 	struct tty	*tp = &hypcn_tty;
 	spl_t s = spltty();
@@ -215,7 +215,6 @@ int hypcnclose(int dev, int flag)
 	ttyclose(tp);
 	simple_unlock(&tp->t_lock);
 	splx(s);
-	return 0;
 }
 
 int hypcnprobe(struct consdev *cp)