diff --git a/avr/devices/t03/boot.asm b/avr/devices/t03/boot.asm
index 8e0f835..eaf6e46 100644
--- a/avr/devices/t03/boot.asm
+++ b/avr/devices/t03/boot.asm
@@ -103,7 +103,8 @@ devInfoVersion:      .db DEVICEINFO_VERSION, DEVICEINFO_REVISION             ; v
 firmwareVersion:     .db FIRMWARE_VARIANT_BOOT, FIRMWARE_VERSION_MAJOR
                      .db FIRMWARE_VERSION_MINOR, FIRMWARE_VERSION_PATCHLEVEL
 
-firmwareStart:   rjmp main ; will be overwritten when flashing
+firmwareStart:
+  rjmp main ; will be overwritten when flashing
 
 
 
@@ -130,6 +131,7 @@ main:
 .include "modules/flash/eeprom.asm"
 .include "modules/flash/io.asm"
 .include "modules/flash/io_uart1.asm"
+.include "modules/flash/flashxp.asm"
 .include "modules/flash/flash4p.asm"
 .include "modules/flash/flashprocess.asm"
 .include "modules/flash/wait.asm"
diff --git a/avr/devices/t03/main.asm b/avr/devices/t03/main.asm
index cbada5a..c5d5130 100644
--- a/avr/devices/t03/main.asm
+++ b/avr/devices/t03/main.asm
@@ -26,9 +26,12 @@
 
 ;.equ SEND_DEVICE_EVERY = 3000
 .equ SEND_DEVICE_EVERY = 3000   ; every 5mins
-;.equ SEND_STATS_EVERY  = 3100   ; about every 5mins
-.equ SEND_STATS_EVERY  = 300     ; every 30s
-.equ SEND_DEBUG_EVERY  = 110
+.equ SEND_STATS_EVERY  = 3100   ; about every 5mins
+;.equ SEND_STATS_EVERY  = 300     ; every 30s
+;.equ SEND_DEBUG_EVERY  = 110
+
+;#define WITH_SEND_DEBUG
+
 
 .nolist
 .include "include/tn841def.inc" ; Define device ATtiny841
@@ -159,6 +162,14 @@ firmwareStart:
 
   sei
 main_loop:
+  rcall BaseTimer_Run
+  rcall TtyOnUart1_Run
+  rcall ComOnUart0_Run
+  
+  ; check incoming msg
+  rcall checkRecvdMsg
+;  rcall freeRecvdMsg
+
     ; only modify SE, SM1 and SM0
     cli
     in r16, MCUCR
@@ -170,13 +181,6 @@ main_loop:
     sei                        ; make sure interrupts really are enabled
     sleep                      ; sleep, wait for interrupt
 
-  rcall BaseTimer_Run
-  rcall TtyOnUart1_Run
-  rcall ComOnUart0_Run
-  
-  ; check incoming msg
-  rcall checkRecvdMsg
-;  rcall freeRecvdMsg
   rjmp main_loop
 
 
@@ -209,7 +213,9 @@ onSystemTimerTick:
 #endif
   rcall TtyOnUart1_Periodically
   rcall ComOnUart0_Periodically
-;  rcall sendDebug
+#ifdef WITH_SEND_DEBUG
+  rcall sendDebug
+#endif
 ;  rcall maybeSendDeviceMsg
   rcall maybeSendTStatsMsg
   rcall maybeSendRStatsMsg
@@ -270,10 +276,12 @@ initModules:
   ldi r16, HIGH(SEND_STATS_EVERY+20)
   sts sendMStatsCounter+1, r16
 
+#ifdef WITH_SEND_DEBUG
   ldi r16, LOW(SEND_DEBUG_EVERY)
   sts debugMsgCounter, r16
   ldi r16, HIGH(SEND_DEBUG_EVERY)
   sts debugMsgCounter+1, r16
+#endif
 
   ret
 ; @end
@@ -303,6 +311,7 @@ initModules:
 .include "modules/network/iface.asm"
 .include "modules/network/msg/defs.asm"
 .include "modules/network/msg/common.asm"
+.include "modules/network/msg/crc.asm"
 .include "modules/network/msg/device-w.asm"
 .include "modules/network/msg/sendstats-w.asm"
 .include "modules/network/msg/recvstats-w.asm"
@@ -500,7 +509,7 @@ checkRecvdMsg:
     rcall NET_Buffer_Locate                   ; (R17)
     ld r17, X
     andi r17, (NET_IFACE_BUFFER_IFACENUM1_BIT | NET_IFACE_BUFFER_IFACENUM0_BIT)
-    rcall reverseInterfaceNum
+    rcall reverseInterfaceNum                 ; (R17)
 ;    ldi r17, TTYONUART1_IFACENUM ; DEBUG: send everything to uart1 to test that code first
     rcall addMsgToInterface
     brcc checkRecvdMsg_end                    ; could not add, jmp
@@ -557,7 +566,7 @@ addMsgToInterface_end:
 ; @end
 
 
-
+#ifdef WITH_SEND_DEBUG
 sendDebug:
   ldi yl, LOW(ttyOnUart1_iface)
   ldi yh, HIGH(ttyOnUart1_iface)
@@ -650,6 +659,7 @@ writeBufferInfoToRegs:
   ldd r18, Y+(1+3)   ; source addr
 writeBufferInfoToRegs_end:
   ret
+#endif
 
 
 
@@ -730,7 +740,9 @@ programRamBegin:
   sendTStatsCounter: .byte 2
   sendRStatsCounter: .byte 2
   sendMStatsCounter: .byte 2
+#ifdef WITH_SEND_DEBUG
   debugMsgCounter:   .byte 2
+#endif
 programRamEnd: