--- researchv9/sys/sun3/mem.c	2018/04/24 17:21:59	1.1
+++ researchv9/sys/sun3/mem.c	2018/04/24 17:30:22	1.1.1.2
@@ -318,3 +318,48 @@ fault:
 	u.u_error = EFAULT;
 	return;
 }
+
+/*ARGSUSED*/
+mmmmap(dev, off, prot)
+	dev_t dev;
+	off_t off;
+{
+	int pf;
+
+	switch (minor(dev)) {
+
+	case M_MEM:
+		pf = btop(off);
+		if (pf < physmem)
+			return (PGT_OBMEM | pf);
+		break;
+
+	case M_VME16D16:
+		if (off >= VME16_SIZE)
+			break;
+		return (PGT_VME_D16 | btop(off + VME16_BASE));
+
+	case M_VME16D32:
+		if (off >= VME16_SIZE)
+			break;
+		return (PGT_VME_D32 | btop(off + VME16_BASE));
+
+	case M_VME24D16:
+		if (off >= VME24_SIZE)
+			break;
+		return (PGT_VME_D16 | btop(off + VME24_BASE));
+
+	case M_VME24D32:
+		if (off >= VME24_SIZE)
+			break;
+		return (PGT_VME_D32 | btop(off + VME24_BASE));
+
+	case M_VME32D16:
+		return (PGT_VME_D16 | btop(off));
+
+	case M_VME32D32:
+		return (PGT_VME_D32 | btop(off));
+
+	}
+	return (-1);
+}