Great, thanks for the info!

Does sun system have any tools/interfaces for BIOS which I could use for getting information about PXE support?

I found Intel documentation for PXE which says that on x86 one may either call 1Ah interrupt function in real mode to find this out, or scan the base memory for "!PXE" or "PXENV+" signatures. However, the doc says that this method is arch-dependent, so, I guess, on sun systems there should be some other method.

Do you know about any of such methods?