diff --git a/C64_4joy_adapter/README.md b/C64_4joy_adapter/README.md
index e915036..f9e13ce 100644
--- a/C64_4joy_adapter/README.md
+++ b/C64_4joy_adapter/README.md
@@ -1,6 +1,11 @@
-  PORTB = *ptr; // is this atomic? probably, because ptr is 6-bit pointer.
+```
+& 'C:\Program Files (x86)\Arduino\hardware\tools\avr\bin\avr-objdump.exe' -S "C:\\Users\\Lehtinen\\AppData\\Local\\Temp\\arduino_build_119176/test.ino.elf" > c:\temp\koe.txt
+```
+
+```
+ PORTB = *ptr; // is this atomic? probably, because ptr is 6-bit pointer.
  f98:	e0 91 26 01 	lds	r30, 0x0126	; 0x800126 <__data_end>
  f9c:	f0 91 27 01 	lds	r31, 0x0127	; 0x800127 <__data_end+0x1>
  fa0:	80 81       	ld	r24, Z
  fa2:	85 b9       	out	0x05, r24	; 5
- 
+```