diff --git a/src/solo.asm b/src/solo.asm
index 5f7a5fe..d7c2561 100644
--- a/src/solo.asm
+++ b/src/solo.asm
@@ -474,3 +474,62 @@ InputTestMenuEnd:
 .org 0x8001668c
     .dw 0x00000002
     .dw 0x00001000
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; Lights activation functions for panel steppy
+
+; Turn on all body lights when requested to isntead of 1P/2P side only.
+.org 0x8009a304
+    beq v0, zero, 0x8009a30c
+.org 0x8009a328
+    bne s0, v0, 0x8009a330
+
+; Turn on extra2 (left back) when left is pressed.
+.org 0x8009a0c8
+    li a0, 0x7
+
+; Turn on extra4 (right back) when right is pressed.
+.org 0x8009a078
+    li a0, 0x5
+.org 0x8009a094
+    li a0, 0x5
+
+; Turn on extra1 (left front) when up-left is pressed.
+.org 0x8009a19c
+    li a0, 0x6
+.org 0x8009a1b8
+    li a0, 0x6
+.org 0x8009a1d0
+    li a0, 0x6
+.org 0x8009a1ec
+    li a0, 0x6
+
+; Turn on extra3 (right front) when up-right is pressed.
+.org 0x8009a118
+    li a0, 0x4
+.org 0x8009a134
+    li a0, 0x4
+.org 0x8009a14c
+    li a0, 0x4
+.org 0x8009a168
+    li a0, 0x4
+
+; Turn on extra1 and 3 (both forward lights) when up is pressed.
+.org 0x8009a028
+    li a0, 0x6
+.org 0x8009a044
+    li a0, 0x4
+.org 0x8009a01c
+    beq v0, zero, 0x8009a024
+.org 0x8009a038
+    bne s0, v0, 0x8009a040
+
+; Turn on extra2 and 4 (both back lights) when down is pressed.
+.org 0x80099fd8
+    li a0, 0x7
+.org 0x80099ff4
+    li a0, 0x5
+.org 0x80099fcc
+    beq v0, zero, 0x80099fd4
+.org 0x80099fe8
+    bne s0, v0, 0x80099ff0
diff --git a/step1_extract.sh b/step1_extract.sh
index dc88e89..bc562ba 100644
--- a/step1_extract.sh
+++ b/step1_extract.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
 
+set -e
+
 mkdir -p data_raw
 python3 tools/py/dump_sys573_gamefs.py --input data_source --output data_raw --key DDR5 --type ddr --input-filenames tools/ddr5th_filenames.json
diff --git a/step2_make.sh b/step2_make.sh
index 73b187b..d0af40d 100644
--- a/step2_make.sh
+++ b/step2_make.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 mkdir -p build
 
 cp -r data_source/* build
diff --git a/step2_make_soloio.sh b/step2_make_soloio.sh
index 0938631..4b04410 100644
--- a/step2_make_soloio.sh
+++ b/step2_make_soloio.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 mkdir -p build
 
 cp -r data_source/* build