diff --git a/main.s65 b/main.s65
index 0fe6d3b..2bac2f6 100644
--- a/main.s65
+++ b/main.s65
@@ -27,15 +27,16 @@
 ; LCD 
     ; .include "utility.asm6502"
 LCD_IO = IO1
-    .include "lcd.s65"
+    .include "system/lcd.s65"
 ; Keypad Reading
 KP_IO = IO2
-    .include "keypad.s65"
+    .include "system/keypad.s65"
 ; SPI
-SPI_IO = IO1
+SPI_IO = IO2
     .include "system/spi.s65"
 ; Printer
-    .include "printer.s65"
+    .include "programs/printer.s65"
+    .include "programs/print_slow.s65"
 ; Digital Humidity and Temerature Sensor
     ; .include "dht.s65"
 
@@ -48,20 +49,20 @@ nmi:
     jsr lcd_char
     rti
 irq:
+IRQ_VAR = 0
     ; read IRFs, while bit 7 ist set handle interrupts
-    ; Print str_irq
 @irq_io1:
-    ; todo use a reserved address instead of 0
-    lda IO1+IO::IFR
-    sta 0
-    bbr7 0,@irq_io2
-    bbs2 0,@irq_spi_p  ; check SR
+    lda SPI_IO+IO::IFR
+    sta IRQ_VAR
+    bbr7 IRQ_VAR,@irq_io2
+    bbs2 IRQ_VAR,@irq_spi_p  ; check SR
 @irq_io2:
-    lda IO2+IO::IFR
-    sta 0
-    bbr7 0,@irq_return
-    bbs4 0,@irq_keypad  ; check CB1
+    ; lda IO2+IO::IFR
+    ; sta IRQ_VAR
+    ; bbr7 IRQ_VAR,@irq_return
+    ; bbs4 IRQ_VAR,@irq_keypad  ; check CB1
     ; this should never be reached
+    jsr lcd_clear
     Print str_irq_unknown
     ; force reset interrupt flags
     lda #$ff
@@ -86,7 +87,7 @@ irq:
 reset:
     jsr lcd_init
 
-    jsr kp_init
+    ; jsr kp_init
 
     jsr spi_p_init
 
@@ -114,53 +115,34 @@ reset:
 .endproc
 
 .proc home
-.macro wait
-wait:
-    stz 1
-    stz 2
-    .repeat 2
-    nop
-    .endrepeat
-    inc 1
-    bne wait
-    inc 2
-    bne wait
-.endmacro
-
-    ; jsr rb_keypad_read
-    lda KB_LAST
+    jsr rb_keypad_read
     beq home
-    stz KB_LAST
     ; beq home
     cmp #'A'
     jeq printer
     cmp #'B'
+    jeq SPI_CODE_START
     ; jeq dht_request
     cmp #'C'
     jeq print_1
     cmp #'D'
     jeq print_2
-    cmp '4'
-    bra debug
 
     cmp #'*'  ; print home menu again if not visible (message 1 and 2 jmp to home)
     jeq return_home
 
     jmp home
-
-debug:
-    DEBUG_LED_ON 0
-    jmp home
-
-
 .endproc
 
+
 print_1:
-    Print message_1
+    jsr lcd_clear
+    PrintSlow message_1,10
     jmp home
 
 print_2:
-    Print message_2
+    jsr lcd_clear
+    PrintSlow message_2,10
     jmp home
 
 .segment "RODATA"
@@ -172,7 +154,8 @@ message_2:
     .asciiz "================"
 message_menu: 
     .byte   "<A> Printer     "
-    .byte   "<B> Temperatur  "
+    ; .byte   "<B> Temperatur  "
+    .byte   "<B> Run from SPI"
     .byte   "<C> Text 1      "
     .asciiz "<D> Text 2      "
 str_irq:
diff --git a/system/spi.s65 b/system/spi.s65
index bd05857..e634bc8 100644
--- a/system/spi.s65
+++ b/system/spi.s65
@@ -9,28 +9,34 @@
 
 .ifndef INCLUDE_SPI
 INCLUDE_SPI = 1
-    .segment "CODE"
+.segment "CODE"
+
+SPI_CODE_START = $3000
+SPI_PAGES_WRITTEN = $2fff
+SPI_BYTES_WRITTEN = $2ffe
 
 
-    .struct SPI_P_Pins
-        ; VIA addresses
-        DDR_a   .word   ; address of the data direction register
-        R_a     .word   ; address of the register
-        ; pin mask
-        SCLK_p  .byte   ; Serial Clock
-        POCI_p  .byte   ; Peripheral Out / Controller In
-        PICO_p  .byte   ; Peripheral In / Controller Out
-        CSB_p   .byte   ; Chip Select
-        ; settings
-        CPOL    .byte   ; Clock Polarity
-        CPHA    .byte   ; Clock Phase
-    .endstruct
+.struct SPI_P_Pins
+    ; VIA addresses
+    DDR_a   .word   ; address of the data direction register
+    R_a     .word   ; address of the register
+    ; pin mask
+    SCLK_p  .byte   ; Serial Clock
+    POCI_p  .byte   ; Peripheral Out / Controller In
+    PICO_p  .byte   ; Peripheral In / Controller Out
+    CSB_p   .byte   ; Chip Select
+    ; settings
+    CPOL    .byte   ; Clock Polarity
+    CPHA    .byte   ; Clock Phase
+.endstruct
 
 ;********************************************************************************
 ; @function Initialize the IO Adapter for SPI
 ; @param ARG0-1 Address of the SPI_Pins struct
 ;********************************************************************************
 .proc spi_p_init
+    stz SPI_PAGES_WRITTEN
+    stz SPI_BYTES_WRITTEN
     ; todo USE MASKS
     ; set Shift register to shift in under external clock on CB1
     lda #IO::ACR::SR_SIN_PHIE
@@ -39,13 +45,16 @@ INCLUDE_SPI = 1
     ; enable SR interrupts
     lda #(IO::IRQ::IRQ | IO::IRQ::SR)
     sta SPI_IO + IO::IER
+    DEBUG_LED_ON 1
     rts
 .endproc
 
 .proc spi_p_read
+    DEBUG_LED_ON 0
     ; print received byte
     lda SPI_IO + IO::SR
     jsr lcd_char
+    inc SPI_BYTES_WRITTEN
     rts
 .endproc