Can i.. order by??

hello there!

i was thinking.. yeap… ¬¬’
can i order by a categories?

for example. this link show me my last post first:
http://www.asia-webtv.com/asiablog/?cat=1

i whant to see the older post firist…
that some way to put:
http://www.asia-webtv.com/asiablog/?cat=1?order=desc?

some thing like that?

other thing i was trying to do its.
in my index only see 1 post. then when i click in one categories see the other post.
like
http://www.asia-webtv.com/asiablog/?cat=1?limit=10

srry my por english T_T

thanx!