I have a Sparc5 that I wanted to make into a "headless" platform,
i.e., no keyboard, no monitor.
I set the NVRAM variables input-device to ttya, and
output-device also to ttya.
The box would not boot up after that. Stop-N likewise will not
If I connect a terminal to Serial port A, I do get some output, but the
machine never enters the boot process, nor am I able to enter any
input via the terminal.
Is there some other way to get the keyboard and monitor set back up
as the default input and output devices?