Minimal machine description file

[Roger.Gough]

Hi all,

I have managed to modify my configure scripts so that gcc recognizes my new
target (called "npe"). Thanks to Alex Courbot for his help here.
My next challenge is to write my machine description files. Scrolling
through the gcc archives, I realised that many people have been looking for
the minimal characteristics to achieve a functioning port of gcc. I was
wondering if anybody had achieved this and if so where would I find it
documented?
If not, would anybody recommend some target files for a similar architecture
to mine. y intention would then be to modify these files to accomodate my
architecture.  The architecture I am porting to is a 32-bit RISC
microcontroller core with:
-load/store instruction set
-Harvard Architecture
-4/5 stage pipeline
-16 hardware contexts
Any help or advice would be greatly appreciated.
Kind Regards.
Roger.