diff --git a/build/h3text.2018 b/build/h3text.2018
index b0be82d3..d05c3387 100644
--- a/build/h3text.2018
+++ b/build/h3text.2018
@@ -41,7 +41,7 @@ HOST : 205.166.94.7 : HACTRN.ORG, HX : PDP-10 : ITS : :
 HOST : CHAOS 5460, 54.174.143.211 : ES-ITS.SWENSON.ORG, ES : PDP-10 : ITS : :
 HOST : CHAOS 5461 : EX-ITS.SWENSON.ORG, EX : PDP-10 : ITS : :
 HOST : CHAOS 5401, CHAOS 3162 : CHAOS.SWENSON.ORG : : : :
-HOST : CHAOS 3150, 88.99.191.74 : NO.NOCREW.ORG, NO : PDP-10 : ITS : :
+HOST : CHAOS 3150 : TT : PDP-10 : ITS : :
 HOST : CHAOS 7100, 50.131.218.138 : SJ.GEWT.NET, SJ : PDP-10 : ITS : :
 HOST : CHAOS 3443, 158.174.114.186 : UP.dfUPDATE.SE, UP.UPDATE.UU.SE, UP : PDP-10 : ITS : :
 HOST : CHAOS 3041 : MX-11.dfUPDATE.UU.SE : UNIX : UNIX : :
diff --git a/build/mchn/TT/boot b/build/mchn/TT/boot
index 66b05177..c6e71564 100644
--- a/build/mchn/TT/boot
+++ b/build/mchn/TT/boot
@@ -14,6 +14,8 @@ set dtc dis
 set dk dis
 set pd ena
 set pd on
+set ch enabled
+set ch node=3150
 at ptr out/pdp10-ka/dskdmp.rim
 at mta0 out/pdp10-ka/sources.tape
 set mta mpx=7
diff --git a/build/mchn/TT/run b/build/mchn/TT/run
index 35183b60..f0639682 100644
--- a/build/mchn/TT/run
+++ b/build/mchn/TT/run
@@ -32,8 +32,12 @@ at -u mty line=14,10018 speed=9600
 at -u mty line=15,10020 speed=4800
 set ten11 enabled
 at ten11 10011
-#set auxcpu enabled
-#at auxcpu 10006
+set ch enabled
+set ch debug
+set ch nodebug=trace
+set ch node=3150
+set ch peer=localhost:42041
+att ch 42042
 set imp enabled
 set imp mac=e2:6c:84:1d:34:a3
 set imp ip=192.168.2.101/24
diff --git a/build/pdp10-ka/config.202 b/build/pdp10-ka/config.202
index a224c054..e9f5b509 100644
--- a/build/pdp10-ka/config.202
+++ b/build/pdp10-ka/config.202
@@ -480,10 +480,10 @@ DEFOPT NNETCH==20.	; # NCP net channels
 DEFOPT INETP==1		; Include Internet code
 DEFOPT TCPP==1		; Include TCP code
 DEFOPT XBL==20.		; # TCP network channels
-DEFOPT CHAOSP==0	;CHAOS NET
-DEFOPT MYCHAD==3114	;CHAOS NET ADDRESS
-DEFOPT NINDX==30.	;NUMBER OF INDICES
-DEFOPT CH10P==0		;CHAOS NET VIA PDP-10 I/O BUS, NOT FRONT-END
+DEFOPT CHAOSP==1	;CHAOS NET
+DEFOPT MYCHAD==3150	;CHAOS NET ADDRESS
+DEFOPT NINDX==50.	;NUMBER OF INDICES
+DEFOPT CH10P==1		;CHAOS NET VIA PDP-10 I/O BUS, NOT FRONT-END
 
 DEFOPT NOTYS==1		;# KA-10 CONSOLE 0 TTYS
 DEFOPT TK10P==1		;HAS TK10 TTY SCANNER
diff --git a/src/sysen1/pword.2664 b/src/sysen1/pword.2664
index f0d2963e..56d06003 100644
--- a/src/sysen1/pword.2664
+++ b/src/sysen1/pword.2664
@@ -9850,6 +9850,10 @@ bltspc:	syscal sstatu,[val x ? val x ? val x ? val x ? val x
 	       blt x,spcend-1	   ;  all of them to the bitter end
 	       setom dm.flg
 	       ret ]
+	camn x,[sixbit /TT/]	   ;is it TT?
+	  jrst [move x,[mdspec,,tsspec]	 ;yes, so use MD's specs
+	        blt x,spcend-1	   ;  all of them, to the end
+		ret ]
 	;; unknown machine, default to MD
 	move x,[mdspec,,tsspec]
 	blt x,spcend-1