On 2023-05-01, Damian McGuckin <[email protected]> wrote: > > What is required please? > > I am trying to boot this bsd.rd (which is a file 4Mb big) on an old > NET5500 which has 512MBytes of RAM. On a running system, > > From the > > boot> > > prompt, doing > > boot> boot bsd.rd > > it appears to loads bsd.rd, but then drops straight back into the BIOS > and starts the BIOS boot.
I guess you mean net5501 (Soekris box). You forgot to tell the boot loader to use the serial port.

