diff --git a/avr/devices/t03/main.asm b/avr/devices/t03/main.asm
index 40f92ad..3b50c58 100644
--- a/avr/devices/t03/main.asm
+++ b/avr/devices/t03/main.asm
@@ -246,10 +246,12 @@ initModules:
 .include "common/m_ringbuffer_y.asm"
 .include "common/ringbuffer_y.asm"
 .include "common/m_fixedbuffers.asm"
-.include "common/crc8.asm"
+;.include "common/crc8.asm"
 .include "modules/flash/wait.asm"
 .include "modules/basetimer/main.asm"
 .include "modules/led_simple/main.asm"
+.include "modules/com2/defs.asm"
+.include "modules/com2/crc.asm"
 .include "modules/uart_hw/defs.asm"
 .include "modules/uart_hw/buffers.asm"
 .include "modules/uart_hw/lowlevel.asm"
@@ -271,6 +273,14 @@ programRamEnd:
 
 
 
+; macro test: can we use parameters for names? -> yes, we can ;-)
+.macro m_testMacro
+testname@0:
+  rjmp testname@0
+.endm
 
 
+macroTest:
+  m_testMacro 1
+