diff --git a/.gitignore b/.gitignore
index 3c29ae6..5a4d475 100755
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,5 @@ stevia-log
 .vscode/
 *.map
 compose-dev.yaml
+eth_null-tx.log
+eth_null-txdump.txt
\ No newline at end of file
diff --git a/include/BIOS/func/video.nasm b/include/BIOS/func/video.nasm
index 9f39122..204292f 100644
--- a/include/BIOS/func/video.nasm
+++ b/include/BIOS/func/video.nasm
@@ -91,6 +91,9 @@ PrintString:
     mov si, [bp + 4]            ; source string
 .print_L0:
     movzx ax, byte [si]
+    %ifdef __STEVIA_DEV_DEBUG
+    out 0xe9, byte al           ; bochs magic debug port
+    %endif
     push ax
     call PrintCharacter
     add sp, 0x2