ldi r16,low(ramend)
out spl,r16
ldi r16,high(ramend)
out sph,r16

clr r20

mov r16,r0
mov r17,r1

cpi r16,0b11111010
brbs 2,s100er
subi r16,250
inc r20
swap r20
mov r18,r20
clr r20

s100er:
cpi r16,0b00011001
brbs 2,s100bcd
subi r16,0b00011001
inc r20
rjmp s100er

s100bcd:
or r18,r20
clr r20

s10er:
ldi r21,0b00000010
s10nldi:
cpi r17,0b10000000
cpc r16,r21
brbs 2,s10bcd
subi r17,0b10000000
sbc r16,r21
inc r20
rjmp s10nldi

s10bcd:
swap r20
mov r19,r20
clr r20

s1er:
clr r21
s1nldi:
cpi r17,0b01000000
cpc r16,r21
brbs 2,bcdend
subi r17,0b01000000
sbc r16,r21
inc r20
rjmp s1nldi

bcdend:
or r18,r20