So oder fehlt noch was?

.include "m8535def.inc"


.org 0x0000
rjmp Start

.org OVF0addr
rjmp TimINT
Start:
;Stack initialisieren
ldi R16, High(Ramend)
out SPH, R16
ldi R16, LOW(Ramend)
out SPL, R16
sei

;Timer konfigurieren
ldi R16, 0b00010000
out Timsk, R16
ldi R16, 0b00000001
out TCCR1B, R16

loop:
rjmp loop

TimINT:
reti


mfg
michi