diff --git a/avr/main.asm b/avr/main.asm
index e643484..516d782 100644
--- a/avr/main.asm
+++ b/avr/main.asm
@@ -90,6 +90,15 @@ ledA3Sram:   .byte LED_SRAM_SIZE
 
 
 
+
+; ***************************************************************************
+; data in EEPROM
+
+.eseg
+
+
+
+
 ; ***************************************************************************
 ; data in FLASH
 
@@ -181,14 +190,21 @@ initModules:
 
 runModulesUntilIdle:
 
-runModulesUntilIdle_Timer:       ; repeat this block for every module with run function
-    rcall Timer_Run              ;
-  brcs runModulesUntilIdle_Timer ;
+  ; TIMER module
+  rcall Timer_Run
 
+  ; COM module (call until carry flag cleared but at most 10 times to not starve other modules)
+  ldi r16, 10
 runModulesUntilIdle_Com:
-    rcall Com_Run
-  brcs runModulesUntilIdle_Com
+    push r16
+      rcall Com_Run
+    pop r16
+    brcc runModulesUntilIdle_ComEnd
+    dec r16
+  brne runModulesUntilIdle_Com
+runModulesUntilIdle_ComEnd:
 
+  ; add more modules here
   ret