diff --git a/cli/lz/build.sh b/cli/lz/build.sh
index c591569..363ba10 100755
--- a/cli/lz/build.sh
+++ b/cli/lz/build.sh
@@ -48,6 +48,8 @@ echo ""
 echo "================================"
 
 # ./ulzenc example.txt a.ulz
+# ./ulzenc example.txt a.ulz
+rm a.ulz
 uxncli ulzenc.rom example.txt a.ulz
 uxncli ~/roms/hx.rom a.ulz
 
diff --git a/cli/lz/ulzenc.c b/cli/lz/ulzenc.c
index f56f54f..695ddde 100644
--- a/cli/lz/ulzenc.c
+++ b/cli/lz/ulzenc.c
@@ -69,13 +69,13 @@ uxn_lz_compress(const void *input, int input_size)
 		/* CPY */
 
 		if(match_len >= MinMatchLength) {
+			printf("*");
 			/* More numeric range: treat 0 as 4, 1 as 5, etc. */
 			match_ctl = match_len - MinMatchLength;
 			/* CPY2 */
 			if(match_ctl > 0x3F) {
 				*output_ptr++ = match_ctl >> 8 | 0xc0; /* High byte of the length, with both flags set */
-				*output_ptr++ = match_ctl;             /* Low byte of the length */
-													   /* CPY */
+				*output_ptr++ = match_ctl;             /* Low byte of the length */						
 			} else
 				*output_ptr++ = match_ctl | 0x80;
 			/* offset(0 is -1, 1 is -2, ...) */
diff --git a/cli/lz/ulzenc.tal b/cli/lz/ulzenc.tal
index 7922bc0..da56205 100644
--- a/cli/lz/ulzenc.tal
+++ b/cli/lz/ulzenc.tal
@@ -38,6 +38,10 @@
 	#4000 .File/length DEO2
 	;raw .File/read DEO2
 	;raw .File/success DEI2 uxn_lz_compress
+	( write )
+	;dst .File/name DEO2
+	.output-ptr LDZ2 ;compressed SUB2 .File/length DEO2
+	;compressed .File/write DEO2
 	( halt ) #800f DEO
 	BRK
 
@@ -91,7 +95,7 @@
 					NEQ ?&end-for2
 				INC2 ORAk ?&for2
 			&end-for2
-			
+
 			( i > match_len )
 			DUP2 .match-len LDZ2 LTH2 ?{
 				DUP2 .match-len STZ2
@@ -112,20 +116,22 @@
 @|opcodes )
 
 @op-cpy ( in* -- )
-	#2222 phex
+	LIT "* #18 DEO
 	( More numeric range: treat 0 as 4, 1 as 5, etc. )
 	.match-len LDZ2 #0004 SUB2 .match-ctl STZ2
 	( CPY2 )
 	.match-ctl LDZ2 #003f GTH2 ?&cpy2
 		( CPY1 )
 		( *output_ptr++ = match_ctl | 0x80; )
-		.match-ctl LDZ2 #0080 ORA2 <append-byte>
+		.match-ctl LDZ2 NIP #80 ORA <append-byte>
 		!&cpy-resume
 		&cpy2
-		( TODO )
+		.match-ctl LDZ2
+		( match_ctl >> 8 | 0xc0 ) SWP #c0 ORA <append-byte>
+		( match_ctl ) <append-byte>
 	&cpy-resume
 	( *output_ptr++ = in - dict_best - 1; )
-	DUP2 .dict-best LDZ2 #0001 SUB2 SUB2 <append-byte>
+	DUP2 .dict-best LDZ2 SUB2 #0001 SUB2 NIP <append-byte>
 	( in += match_len; Advance input by size of the match )
 	.match-len LDZ2 ADD2
 	( Disable combining previous literal, if any )