GCC port

[eljedi .]

Hello,

I want to know how to port gcc to a platform (learn purpose only).
I've been reading some links:
http://gcc.gnu.org/onlinedocs/gcc-2.95.2/gcc_16.html#SEC169

But this are for 2.95. Does  it still holds? is there any updated doc?
or any link recomendation?

As a playground I was thinking on port gcc to snes procedor (16bits
WDL w65c816). Do you think is doable? (a decent port I mean, which
generates good code)

Thank you very much