[ "$ARGC" -gt 1 ] && return 1
case "$board" in
+ all0256n | \
bc2 | \
dir-300-b1 | \
dir-600-b1 | \
omni-emb | \
rt-g32-b1 | \
rt-n15 | \
+ rt-n56u | \
+ sl-r7205 | \
w502u |\
+ wr6202 |\
v22rw-2x2 | \
+ wl341v3 | \
wli-tx4-ag300n | \
- whr-g300n)
+ whr-g300n |\
+ wr512-3gn)
[ "$magic" != "2705" ] && {
echo "Invalid image type."
return 1