diff --git a/source/position_sense/hdsl/firmware/hdsl_master_icssg_300_mhz_bin.h b/source/position_sense/hdsl/firmware/hdsl_master_icssg_300_mhz_bin.h
index 7299a62..176bb86 100644
--- a/source/position_sense/hdsl/firmware/hdsl_master_icssg_300_mhz_bin.h
+++ b/source/position_sense/hdsl/firmware/hdsl_master_icssg_300_mhz_bin.h
@@ -55,7 +55,7 @@
  */
 
 const unsigned int Hiperface_DSL2_0[]= {
-0x21067500,
+0x21067700,
 0x24000125,
 0x2eff818f,
 0x24001d8d,
@@ -151,7 +151,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0xd104ff00,
 0xd703ffff,
 0x24002f1e,
-0x2304669d,
+0x2304689d,
 0x05014545,
 0x4f0045d2,
 0x24000070,
@@ -453,7 +453,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x69084502,
 0x21028200,
 0x69074502,
-0x2102dd00,
+0x2102df00,
 0x51000c2b,
 0x51015b04,
 0x100c0c02,
@@ -522,14 +522,14 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x0b024d00,
 0x12006d6d,
 0x09064d4d,
-0x2103db00,
+0x2103dd00,
 0xd104ff00,
 0xd703ffff,
 0x106d6d1e,
 0x511f0d03,
 0x51190d02,
 0x79000003,
-0x23063cd1,
+0x23063ed1,
 0x7900001a,
 0xd104ff00,
 0xd703ffff,
@@ -541,7 +541,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x511f0d12,
 0x51190d11,
 0xc901c402,
-0x21032000,
+0x21032200,
 0x910c3c81,
 0x240117e0,
 0x04e1e0e0,
@@ -636,7 +636,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x1f00c0c0,
 0x1f008181,
 0x81505880,
-0x2104f000,
+0x2104f200,
 0x91042580,
 0xd708e0ff,
 0x91042580,
@@ -717,7 +717,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x2400060d,
 0x040d6666,
 0x230252d1,
-0x7900003f,
+0x79000041,
 0x2400010d,
 0x000d6666,
 0x230252d1,
@@ -729,13 +729,15 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x2400269f,
 0x1f020202,
 0x81521802,
-0x79000033,
+0x79000035,
 0x81521802,
 0x0908f3e2,
 0x10727202,
 0x91a45800,
 0x0480d281,
-0x06c093c1,
+0x04c093c1,
+0x5880d202,
+0x0501c1c1,
 0x10e1e1e2,
 0xc91fe203,
 0x1600e2e2,
@@ -768,7 +770,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x813a188d,
 0x24000019,
 0x79000002,
-0x2304d0d1,
+0x2304d2d1,
 0x10535300,
 0x10333320,
 0x10131340,
@@ -931,7 +933,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x24003001,
 0xd1066b0e,
 0x2400010d,
-0x230667d1,
+0x230669d1,
 0x68ab8d45,
 0x13803b3b,
 0x913d1880,
@@ -944,7 +946,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x81531800,
 0x7900003b,
 0x2400020d,
-0x230667d1,
+0x230669d1,
 0x688b8d38,
 0x8137184b,
 0x13803b3b,
@@ -987,7 +989,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x1d09c4c4,
 0x2400040d,
 0x24003001,
-0x230667d1,
+0x230669d1,
 0x15ff8d9c,
 0x69005c34,
 0x51009c33,
@@ -1224,7 +1226,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x108787c7,
 0x04c98087,
 0x108080c9,
-0x2304b7d1,
+0x2304b9d1,
 0x108b8b9d,
 0x91aa1800,
 0x1f018000,
@@ -1244,7 +1246,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x108787c7,
 0x04c98087,
 0x108080c9,
-0x2304b7d1,
+0x2304b9d1,
 0x91983880,
 0x10eeeee1,
 0x24000061,
@@ -1333,7 +1335,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x81080580,
 0x24001fc0,
 0x810605c0,
-0x24004300,
+0x24004400,
 0x810b1800,
 0x81441800,
 0x2eff8383,
@@ -1367,7 +1369,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x9101185b,
 0x51005b0e,
 0x7900000d,
-0x230624d1,
+0x230626d1,
 0x91dc388c,
 0x240000e2,
 0x91e21882,
@@ -1375,7 +1377,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x100c0c2a,
 0x106c6c4a,
 0x102c2c6a,
-0x230624d1,
+0x230626d1,
 0x0b01e2e2,
 0x0501e2e2,
 0x4f00e2ff,
@@ -1498,7 +1500,7 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x0b077200,
 0x12001313,
 0x0901f2f2,
-0x230630d1,
+0x230632d1,
 0x510e6506,
 0x6f010df6,
 0x10656546,
@@ -1535,16 +1537,16 @@ const unsigned int Hiperface_DSL2_0[]= {
 0xd703ffff,
 0x24001b8d,
 0x23016a9d,
-0x2305f69d,
-0x230630d1,
+0x2305f89d,
+0x230632d1,
 0x6f010deb,
 0x05012525,
 0x4f0025f8,
 0x24001025,
 0x24001c8d,
 0x23016a9d,
-0x2305f69d,
-0x230630d1,
+0x2305f89d,
+0x230632d1,
 0x6f010dd8,
 0x05012525,
 0x4f0025fa,
@@ -1711,4 +1713,4 @@ const unsigned int Hiperface_DSL2_0[]= {
 0x91003c82,
 0x1308e2e2,
 0x81003c82,
-0x2104f000 };
+0x2104f200 };
diff --git a/source/position_sense/hdsl/firmware/transport.asm b/source/position_sense/hdsl/firmware/transport.asm
index 9471fc4..32f51de 100644
--- a/source/position_sense/hdsl/firmware/transport.asm
+++ b/source/position_sense/hdsl/firmware/transport.asm
@@ -164,7 +164,11 @@ transport_on_v_frame_not_first:
 ;check for LAST FAST POS and SAFE POS mismatch
 	lbco		&REG_TMP0.b0, MASTER_REGS_CONST, LAST_FAST_POS0, SIZE_FAST_POS
 	sub		REG_TMP1.w0, VERT_L.w2, REG_TMP0.w0
-	suc		REG_TMP1.w2, VERT_H.w0, REG_TMP0.w2
+	sub		REG_TMP1.w2, VERT_H.w0, REG_TMP0.w2
+	qble 	no_sub_carry, VERT_L.w2, REG_TMP0.w0
+; if carry is needed, subtract 1 separately
+	sub		REG_TMP1.w2, REG_TMP1.w2, 1
+no_sub_carry:
 	mov		REG_TMP2, REG_TMP1
 ;check if diff is neg,
 	qbbc		transport_on_v_frame_diff_pos, REG_TMP2, 31