diff --git a/README.md b/README.md
index 3994f11..246da9d 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ Windows/MinGW:
 
 ```
 usage:  c2d [-vh?]
-        c2d [-m] [-s start address override] input[.mon],[load_address] output.dsk
+        c2d [-m] [-t filename] [-s start address override] input[.mon],[load_address] output.dsk
 
         -h|? this help
         -m jump to monitor after booting
@@ -112,7 +112,7 @@ Yes.  No input checking.  Big Endian untested.
 
 ### The Ugly Stuff
 
-c2d, Code to Disk, Version 0.4, Sun Apr  9 03:16:22 UTC 2017
+c2d, Code to Disk, Version 0.42, Sun Apr  9 03:16:22 UTC 2017
 
 (c) 2012,2017 All Rights Reserved, Egan Ford (egan@sense.net)
 
diff --git a/asm/loader.s b/asm/loader.s
index 9769a19..bcb507d 100644
--- a/asm/loader.s
+++ b/asm/loader.s
@@ -12,11 +12,12 @@ hipage	=	$B500
 rwtsprm	=	$B7E8		; looked at dos 3.3 disk, not using $3E3 to find
 rwts	=	$B7B5
 preg	=	$48		; mon p reg
-;trkcnt	=	$00		; track counter
-;segcnt	=	$01		; loop var
-;buffer	=	$02		; MSB of RWTS buffer
-;secnum	=	$03		; loop var
-;trknum	=	$04		; loop var
+;;;run time
+trkcnt	=	$00		; track counter
+segcnt	=	$01		; loop var
+buffer	=	$02		; MSB of RWTS buffer
+secnum	=	$03		; loop var
+trknum	=	$04		; loop var
 
 
 start:
@@ -63,7 +64,7 @@ trkloop:
 	lda	trkcnt
 	bne	fulltrack
 	lda	lastsector
-	jmp	subtrack
+	bpl	subtrack
 fulltrack:
 	lda	#$F
 subtrack:
@@ -114,13 +115,14 @@ loadpage:
 	.org	*+1
 nextjump:
 	.org	*+2
-trkcnt:
-	.org	*+1
-segcnt:
-	.org	*+1
-buffer:
-	.org	*+1
-secnum:
-	.org	*+1
-trknum:
-	.org	*+1
+;;; used for debug
+;trkcnt:
+;	.org	*+1
+;segcnt:
+;	.org	*+1
+;buffer:
+;	.org	*+1
+;secnum:
+;	.org	*+1
+;trknum:
+;	.org	*+1
diff --git a/bin/c2d b/bin/c2d
index 70da0d9..5b2d478 100755
Binary files a/bin/c2d and b/bin/c2d differ
diff --git a/bin/c2d.exe b/bin/c2d.exe
index 619fc5a..9c1a4c5 100755
Binary files a/bin/c2d.exe and b/bin/c2d.exe differ
diff --git a/c2d.c b/c2d.c
index e0b438c..3bfa41b 100644
--- a/c2d.c
+++ b/c2d.c
@@ -1,6 +1,6 @@
 /*
 
-c2d, Code to Disk, Version 0.4, Sun Apr  9 03:16:22 UTC 2017
+c2d, Code to Disk, Version 0.42, Sun Apr  9 03:16:22 UTC 2017
 
 (c) 2012,2017 All Rights Reserved, Egan Ford (egan@sense.net)
 
@@ -53,7 +53,7 @@ Based on work by:
 #include <sys/stat.h>
 #include "c2d.h"
 
-#define VERSION "Version 0.4"
+#define VERSION "Version 0.42"
 #define INFILE argv[argc-2]
 #define OUTFILE argv[argc-1]
 #define BINARY 0
diff --git a/c2d.h.0 b/c2d.h.0
index 6e4f1d8..4c9ddc6 100644
--- a/c2d.h.0
+++ b/c2d.h.0
@@ -13,7 +13,7 @@ typedef struct d {
 
 const char *usagetext="\n\
 usage:  c2d [-vh?]\n\
-        c2d [-m] [-s start address override] input[.mon],[load_address] output.dsk\n\
+        c2d [-m] [-t filename] [-s start address override] input[.mon],[load_address] output.dsk\n\
 \n\
         -h|? this help\n\
         -m jump to monitor after booting\n\
diff --git a/test.sh b/test.sh
index fb1f1c7..5fb4d50 100755
--- a/test.sh
+++ b/test.sh
@@ -37,7 +37,7 @@ else
 	exit 1
 fi
 
-SUM=f27ea2a4fcc7c85ac25c3eacba24e958
+SUM=1e6d9243c1dd78e6cb289aafaf5437a1
 
 rm -f ${BIN}.dsk
 echo