diff --git a/avr/devices/all/hw_tn841.asm b/avr/devices/all/hw_tn841.asm
index 1804319..8ca90c3 100644
--- a/avr/devices/all/hw_tn841.asm
+++ b/avr/devices/all/hw_tn841.asm
@@ -110,7 +110,11 @@ systemSetupTimer0:                            ; setup timer for IRQ every 100ms
   ldi r16, 78-1
   out OCR0A, r16
 
+#ifdef BASETIMER_T841_FAST
+  ldi r16, 1
+#else
   ldi r16, 10
+#endif
   sts baseTimerModuleReloadValue, r16
   sts baseTimerModuleTickCounter, r16
 .endif
diff --git a/avr/devices/t03/main/main.asm b/avr/devices/t03/main/main.asm
index a37e92f..8947efb 100644
--- a/avr/devices/t03/main/main.asm
+++ b/avr/devices/t03/main/main.asm
@@ -53,6 +53,8 @@
 
 
 #define MAIN_WITHOUT_MSG_HANDLING ; we do message handling ourselfes
+#define BASETIMER_PRIVATE_TICK_FN ; we use our own system tick function
+#define BASETIMER_T841_FAST       ; call our tick every 10ms
 
 #define MODULES_CLOCK
 ;#define MODULES_COM
@@ -90,6 +92,17 @@
 .equ VALUE_ID_LEDSIMPLE_TIMING = 0x88
 
 
+
+; ***************************************************************************
+; data segment
+
+.dseg
+
+t03TickCounter: .byte 1
+
+
+
+
 ; ***************************************************************************
 ; code segment
 
@@ -148,6 +161,9 @@ firmwareVersion:     .db FIRMWARE_VARIANT_TEMP_WINDOW, FIRMWARE_VERSION_MAJOR
 ; @routine firmwareStart @global
 
 firmwareStart:
+  cli
+  clr r16
+  sts t03TickCounter, r16
   rjmp main
 ; @end
 
@@ -163,6 +179,22 @@ onSystemStart:
 
 
 
+privateTimerTick:
+  lds r16, t03TickCounter
+  inc r16
+  cpi r16, 10
+  brcs privateTimerTick_store
+  clr r16
+privateTimerTick_store:
+  sts t03TickCounter, r16
+  cpi r16, 0
+  breq privateTimerTick_runSystemTick
+  ; TODO
+  ret
+privateTimerTick_runSystemTick:
+  rjmp onSystemTimerTick
+
+
 
 
 
diff --git a/avr/modules/basetimer/main.asm b/avr/modules/basetimer/main.asm
index 077defc..55e46db 100644
--- a/avr/modules/basetimer/main.asm
+++ b/avr/modules/basetimer/main.asm
@@ -92,7 +92,11 @@ BaseTimer_Run:
 BaseTimer_Run_loop:                       ; for every timer tick
     push r24
       push r25
+.ifdef BASETIMER_PRIVATE_TICK_FN
+        rcall privateTimerTick
+.else
         rcall onSystemTimerTick
+.endif
       pop r25
     pop r24
     sbiw r25:r24, 1