ldi r16, 25

mov r8, r16

call IsEightTendie

pop r1

call EndLoop

.org 0x26

IsEightTendie:

sts 0x0100, r16

sts 0x0101, r17 ; this might be considered safe but who knows where the stack pointer

sts 0x0102, r1 ; could be before executing this subroutine in some other application

pop r16

pop r17

push r8 ;r8 is on the stack preserving it's value

lsr r8

brbs 0, IsNotDivisible

lsr r8

brbs 0, IsNotDivisible

lsr r8

brbs 0, IsNotDivisible

pop r8

eor r1, r1 ;sets this to zero

com r1 ; sets to 0xFF

push r1 ; r1 is on the stack ;return FF

push r17

push r16

lds r16, 0x0100

lds r17, 0x0101

lds r1, 0x0102

ret

.org 0x75

IsNotDivisible: ;ret 0

pop r8

eor r1, r1

push r1

push r17

push r16

lds r16, 0x0100

lds r17, 0x0101

lds r1, 0x0102

ret

.org 0x100

EndLoop:

rjmp EndLoop