How do you write a PSP compiler?

Hello, I am trying to port Marathon to the PSP in Forth.
However I don't know where to find a Forth target
compiler for the PSP. So I am writing one of my own.
If someone could give me a link to the PSP oppcodes,
toolbox, executable format, and a PSP assembler
tutorial then I would be very gratefull.

Thank you, Bye.

just try to find a forth backend for gcc.

Thank you! I would be quite happy to use gForth.
Do you you know if the PSP gcc runs on MacOS 9?

Thanks again,
Inigo Montoya