Porting SDL to New Platform HOWTO?

I’ve been asked to explore the feasibility of porting SDL to a new
platform. However, I can’t seem to find any documentation that touches on
this subject. Does anyone have any suggestions on where to begin looking to
get a sense of what kind of work is involved?

Please reply via email; I'm not a member of this list.  If there are

interesting responses, I’ll post a summary.

				Many thanks,