FPGASIZE=$1
rm version

cat UFMboth_post.bin CFMboth_post.bin > $3
echo $2 > version
dd conv=notrunc if=version bs=1 count=8 of=$3

if [[ FPGASIZE -gt 15 ]]
then
    EXPECTED=16#66000 #10M16
elif [[ FPGASIZE -gt 7 ]]
then
    EXPECTED=16#39800 #10M08
elif [[ FPGASIZE -gt 3 ]]
then
    EXPECTED=16#35800 #10M04
fi

PADSIZE=$((EXPECTED - `stat -c %s $3`))
if [[ PADSIZE -gt 0 ]]
then
	perl -e "print chr(255)x$PADSIZE" >> $3
fi