diff --git a/build/misc.tcl b/build/misc.tcl
index c303bd78..afe46f36 100644
--- a/build/misc.tcl
+++ b/build/misc.tcl
@@ -1533,3 +1533,7 @@ expect ":KILL"
 # IBMASC
 respond "*" ":midas sys3;ts ibmasc_sysen1;ibmasc\r"
 expect ":KILL"
+
+# NEWDEC
+respond "*" ":midas sys3;ts newdec_sysen1;newdec\r"
+expect ":KILL"
diff --git a/doc/programs.md b/doc/programs.md
index eff5a577..320424e7 100644
--- a/doc/programs.md
+++ b/doc/programs.md
@@ -195,6 +195,7 @@
 - MUNCH, TV-munching square.
 - NAME, shows logged in users and locations, aka FINGER.
 - NETIME, network time dragon.
+- NEWDEC, DECtape converter.
 - NICNAM/NICWHO, look up someone in the Arpanet directory.
 - NIMLIN, a game of unknown features.
 - NODIPS, SUDS wirelister (without DIP definitions).
diff --git a/src/sysen1/newdec.18 b/src/sysen1/newdec.18
new file mode 100755
index 00000000..a4b1208e
--- /dev/null
+++ b/src/sysen1/newdec.18
@@ -0,0 +1,143 @@
+TITLE DEC-MAC TAPE CONVERTER
+
+;THIS PROGRAM IS STARTED AT LOCATION GO 
+;AND TYPES "?" AFTER WHICH YOU ANSWER WITH A DIGIT 0-8
+;THE DRIVE (OR 0 IF ALREADY ON DISK) OF A NEW FMT DECTAPE
+;AND WRITES THE ENTIRE TAPE ONTO THE DISK AS FILE
+;.TEMP. .FILE.   IT THEN GROVELS OVER THE CRAP AND
+;PRODUCES UP TO 22 FILES ON THE DISK BY THE SAME NAME
+;AND EXTENSION AS THE ORIGINAL DEC TAPE.  IT
+;ALSO CLEANS THE COB-WEBBS OUT OF THE DISK DRIVE.
+
+;IF FOR SOME REASON THE FILE .TEMP. .FILE. ALREADY
+;EXISTS, START THE PROGRAM AT LOCATION FDIR
+; OR INDICATE DRIVE "0"
+
+
+UTIC==1
+UTOC==2
+TYI==3
+TYO==4
+
+A=1
+B=2
+C=3
+D=4
+P=5
+
+GO:	.OPEN TYI,[SIXBIT /   TTY/]
+	.VALUE [ASCIZ /TYI?/]
+	.OPEN TYO,[SIXBIT /  !TTY/]
+	.VALUE [ASCIZ /TYO?/]
+	.IOT TYO,["?]
+	.IOT TYI,A
+	SUBI A,"0	;CHAR ZERO
+	JUMPL A,.-3
+	CAILE A,8	;NUM 0-8 OK
+	JRST .-5
+	JUMPE A,FDIR	;0 MEANS DSK
+	.UBLAT A,
+	.VALUE [ASCIZ /UBLAT?/]
+	DPB A,[400,,TPI]
+	.OPEN UTIC,TPI
+	.VALUE [ASCIZ /TPI?/]
+	.OPEN UTOC,TPO
+	.VALUE [ASCIZ /TPO?/]
+	MOVEI A,111
+GO1:	MOVE B,[-2000,,BUF]
+	.IOT UTIC,B
+	MOVE B,[-2000,,BUF]
+	.IOT UTOC,B
+	SOJG A,GO1
+	.CLOSE UTIC,
+	.CLOSE UTOC,
+	MOVE A,TPI
+	.UDISMT A,
+	JFCL [ASCIZ /UNF?/]
+FDIR:	MOVEI P,PDL
+	PUSHJ P,OPEN
+	MOVEI A,100.
+	PUSHJ P,GETBLK
+	MOVE A,[BUF,,FILDIR]
+	BLT A,FILDIR+177
+	MOVEI A,0
+FDIR1:	SKIPE FILDIR+83.(A)
+	PUSHJ P,READ
+	CAIGE A,21.
+	AOJA A,FDIR1
+	.VALUE [ASCIZ /:KILL /]
+
+READ:	PUSH P,A
+	MOVE B,FILDIR+83.(A)
+	MOVEM B,UTOCO+1
+	HLLZ B,FILDIR+105.(A)
+	SKIPN B
+	MOVSI B,(SIXBIT /@/)
+	MOVEM B,UTOCO+2
+	MOVEI D,0
+	MOVE B,[440500,,FILDIR]
+	AOS A	;LOC 0 => FILE 1
+RD2:	ILDB C,B
+	AOS D
+	CAMN C,A
+	JRST FOUND
+	CAIL D,576.
+	.VALUE [ASCIZ /BLK?/]
+	JRST RD2
+
+
+FOUND:	MOVE A,D
+	.OPEN UTOC,UTOCO
+	.VALUE [ASCIZ /OUT?/]
+	PUSHJ P,GETBLK
+	LDB A,[101200,,BUF]
+	CAME A,D
+GET:	PUSHJ P,GETBLK
+	LDB A,[700,,BUF]
+	MOVNS A
+	MOVSS A
+	HRRI A,BUF+1
+	.IOT UTOC,A
+	HLRZ A,BUF
+	JUMPN A,GET
+	.CLOSE UTOC,
+	POP P,A
+	POPJ P,
+
+OPEN:	.OPEN UTIC,UTICO
+	.VALUE [ASCIZ /TEMP?/]
+	POPJ P,
+
+GETBLK:
+READBK:	PUSH P,A
+	SOS A
+	IMULI A,200
+	.ACCESS UTIC,A
+	MOVE A,[-200,,BUF]
+	.IOT UTIC,A
+	POP P,A
+	POPJ P,
+
+
+UTICO:	SIXBIT /  &DSK/
+	SIXBIT /.TEMP./
+	SIXBIT /.FILE./
+
+UTOCO:	SIXBIT /  'DSK/
+	0
+	0
+
+PDL:	BLOCK 69
+BUF:	BLOCK 2000
+FILDIR:	BLOCK 200
+
+TPI:	SIXBIT /  &UT0/
+	SIXBIT /FOO/
+	SIXBIT /BAR/
+
+TPO:	SIXBIT /  'DSK/
+	SIXBIT /.TEMP./
+	SIXBIT /.FILE./
+
+END GO
+ð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒð0`Áƒ
\ No newline at end of file