--- conf/Adevs.orig	2021-01-24 13:49:59.811654355 +0100
+++ conf/Adevs	2021-01-24 13:48:59.475892676 +0100
@@ -27,3 +27,6 @@
 dl5	=	1
 csw	=	1	/ machine has switch register
 ltc	=	1	/ machine has LTC but no register
+ad	=	1
+rp	=	1
+ra	=	1
--- conf/Bdevs.orig	2021-01-24 13:50:06.026484536 +0100
+++ conf/Bdevs	2021-01-24 13:48:59.476872602 +0100
@@ -9,3 +9,4 @@
 	&nulldev,	&tcclose,	&tcstrategy, 	&tctab,	/*  4 tap tc */
 	&rx2open,	&nulldev,	&rx2strategy,	&rx2tab,/*  5 rx rx2 */
 	&hmopen,	&nulldev,	&hmstrategy,	&hmtab,	/*  6 hm hm */
+	&raopen,	&nulldev,	&rastrategy,	&ratab,	/*  7 ra ra */
--- conf/Cdevs.orig	2021-01-24 13:50:13.250358571 +0100
+++ conf/Cdevs	2021-01-24 13:48:59.477878468 +0100
@@ -1,6 +1,6 @@
 # definitions of character devices */
 #	open	    close	read	write	sgtty		dev name driver
-	&klopen,   &klclose,  &klread,   &klwrite,  &klsgtty,	/*  0 tty console */
+	&klopen,   &klclose,  &klread,   &klwrite,  &klioctl,	/*  0 tty console */
 	&pcopen,   &pcclose,  &pcread,   &pcwrite,  &nodev,     /*  1 ppt pc */
 	&lpopen,   &lpclose,  &nodev,    &lpwrite,  &nodev,     /*  2 lp  lp */
 	&dhopen,  &dhclose,   &dhread,   &dhwrite,   &dhsgtty,	/*  3 tty dc */
@@ -23,3 +23,5 @@
 	&dzopen,  &dzclose,   &dzread,   &dzwrite,   &dzsgtty,	/* 20 tty dz */
 	&stopen,  &stclose,   &stread,   &nodev,     &nodev,	/* 21 stat stat */
 	&fakeopen, &fakeclose, &fakeread,&fakewrite,&fakesgtty, /* 22 tty fake */
+	&nodev,    &nodev,    &nodev,    &nodev,    &nodev,     /* 23     ad */
+	&raopen,   &nulldev,  &raread,   &rawrite,  &nodev,	/* 24 rra ra */