Michael Joosten <joost@c-lab.de>  wrote:
 > It ran... under Solaris, yes, and I was able to netboot a few of the smaller
 > utilities in SAU. CALENDAR, INVOL, CONFIG, but not DEX nor the Apollo kernel.
 > There was some request from the Apollo back to the server which was
 > unknown...

Once the file is loaded, the kernel does a great many things to actually
boot itself.  It seems highly unlikely you'll be able to or even want to
write enough of the DDS protocol goop to want to do this.