diff --git a/build/sims/config.202 b/build/sims/config.202
index f531324f..c9756585 100644
--- a/build/sims/config.202
+++ b/build/sims/config.202
@@ -260,6 +260,10 @@ DEFOPT TT11NM==0	; # of 10-11 PDP11 that handles TV TTYs.
 DEFOPT N11TYS==16.	; # PDP11 TV TTYS
 DEFOPT MXVBN==40	; Max video bfr # for assignment purposes.
 
+DEFOPT PDP6P==1		;HAS PDP6
+DEFSYM PDP6BM==3000000	;BASE ADR OF PDP6 MEM AS SEEN FROM 10
+DEFSYM LPDP6M==16.	;LENGTH OF PDP6 MEM IN PAGES
+
 DEFOPT TSYSM==768.	;TOTAL PDP10 1K MEM BLOCKS
 DEFOPT NMMP==4		;# EXEC PAGES FOR MMP TABLE (# VIR PGS/512.)
 
diff --git a/build/sims/run b/build/sims/run
index e2f27baf..139aa6c6 100644
--- a/build/sims/run
+++ b/build/sims/run
@@ -14,6 +14,8 @@ set mty enabled
 at mty 10003
 set ten11 enabled
 at ten11 10011
+set auxcpu enabled
+at auxcpu 10006
 at ptr bin/ka10/boot/dskdmp.rim
 at dpa0 out/sims/rp03.2
 at dpa1 out/sims/rp03.3