diff --git a/doc/_info_/tctyp.order b/doc/_info_/tctyp.order
index d5b0b9f8..1d9d8d98 100755
--- a/doc/_info_/tctyp.order
+++ b/doc/_info_/tctyp.order
@@ -7,7 +7,7 @@ Command names may be abbreviated if the abbreviation is unambiguous.
 
 The basic commands are: AAA AMBASSADOR C100 CDI DATAMEDIA DATAPOINT
 DISAPPOINT DM2500 EXECUPORT GLASS GT40 GT44 H19 HEATH HP2640 IMLAC
-LA36 MBEE MEMOWRECK MINIBEE4 OMRON PRINTING S1GRINNEL SBEE
+LA36 MBEE MEMOWRECK MINIBEE4 OIMLAC OMRON PRINTING S1GRINNEL SBEE
 SIMLAC SOFTWARE SUPERBEE T1061 T35 TEKTRONIX TELETYPE
 TERMINET TIMLAC TISILENT TT2500 TV VT50 VT52 Z19 340D.
 For other types of terminals, see INFO;CRTSTY >.
@@ -62,12 +62,12 @@ would have been given.  Thus, it is possible to find out what the
 effect of a command string would be without actually trying it, by
 adding "DESCRIBE" to it.
 
-The "BASIC COMMANDS" are "AMBASSADOR" "DATAPOINT", "DISAPPOINT", "DATAMEDIA",
-"CDI", "EXECUPORT", "GLASS", "GT40", "GT44", "HEATH", "HP2640", "IMLAC",
-"LA36", "LOSER", "MEMOWRECK", "MBEE", "MINIBEE4", "OMRON", "PRINTING",
-"SIMLAC", "SIMULATED", "SOFTWARE", "SBEE", "SUPERBEE", "T35",
-"TELETYPE", "TIMLAC", "TISILENT", "TERMINET", "TV", "VT50", "VT52".
-Some are aliases of others.
+The "BASIC COMMANDS" are "AMBASSADOR" "DATAPOINT", "DISAPPOINT",
+"DATAMEDIA", "CDI", "EXECUPORT", "GLASS", "GT40", "GT44", "HEATH",
+"HP2640", "IMLAC", "LA36", "LOSER", "MEMOWRECK", "MBEE", "MINIBEE4",
+"OIMLAC", "OMRON", "PRINTING", "SIMLAC", "SIMULATED", "SOFTWARE",
+"SBEE", "SUPERBEE", "T35", "TELETYPE", "TIMLAC", "TISILENT",
+"TERMINET", "TV", "VT50", "VT52".  Some are aliases of others.
 
 Each basic command sets most of the major parameters. The other
 commands usually set only one parameter.  If a parameter is set by
@@ -244,6 +244,10 @@ NOUPPERCASE	Stops conversion of lower case to upper case.
 OCO		Tells the system to allow programs to type out
 		even while a com-link is in progress.
 
+OIMLAC		Declares the terminal to be an Imlac PDS1 (DM Style),
+                with the old SSV console program.  This type of Imlac
+		cannot print SAIL characters or send meta bits.
+
 OMRON		Declares the terminal to be an OMRON display.
 
 OVERPRINT	Tells the system that overprinting is
diff --git a/src/syseng/tctyp.153 b/src/syseng/tctyp.154
similarity index 99%
rename from src/syseng/tctyp.153
rename to src/syseng/tctyp.154
index aa1b2c56..90c2d8bf 100755
Binary files a/src/syseng/tctyp.153 and b/src/syseng/tctyp.154 differ
diff --git a/src/system/its.1649 b/src/system/its.1650
similarity index 99%
rename from src/system/its.1649
rename to src/system/its.1650
index 8b508e01..903cabf6 100644
--- a/src/system/its.1649
+++ b/src/system/its.1650
@@ -273,6 +273,17 @@ T!N!$TCT==TCT
 T!N!$ROL==ROL
 TERMIN
 
+;DEFINE TTY AS IMLAC. (USING OLD IMLAC CURSOR CODES)
+DEFINE TTDOIM N,+SPEED=50K,ISPEED=25K,TT=0,TY=0,TO=0,TP=0,HOR=90.,VER=44.,TCT=%TNIML,ROL=10.,SMARTS=%TQIM1
+T!N!$SMT==SMARTS,,
+T!N!$HOR==HOR
+T!N!$VER==VER
+T!N!$OPT==TO+%TOOVR+%TOLWR+%TOMVB+%TOMVU+%TOERS+%TOLID+%TOCID,,TP
+T!N!$TYP==%TTDDI+TT+<SPEEDC ISPEED,SPEED>,,TY+<CNTRLR N>
+T!N!$TCT==TCT
+T!N!$ROL==ROL
+TERMIN
+
 ;DEFINE TTY AS VT52
 DEFINE TTDVT N,+SPEED=9600,ISPEED=,TT=0,TY=0,TO=0,TP=%TPORS,HOR=80.,VER=24.,TCT=%TNESC,ROL=1,SMARTS=0
 T!N!$SMT==SMARTS,,
@@ -455,7 +466,7 @@ TERMIN
 $INSRT TTYTYP
 	.CRFON
 EXPUNGE TTDPRT,TTDTRM,TTDDPT,TTDMRX,TTDGT40,TTD11,TTDRAN,TTDGRN,TTDVT,TTDTEK
-EXPUNGE TTDTV,TTD2741,TTDSTY,TTDLPT,TTDIML,TTDLA36,TTDLSR
+EXPUNGE TTDTV,TTD2741,TTDSTY,TTDLPT,TTDIML,TTDOIM,TTDLA36,TTDLSR
 EXPUNGE SPEEDC,SPEED1,CNTRLR,MCONDX,.ENDC,.ENDR
 ]		;END OF IF2