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  I submitted a PR today to make pc0 fail to probe if there was no
keyboard attached. My PR wasn't quite right, but a mislabelled floppy
foiled my test.
  I needed to change the pccnprobe() to fail rather than pcprobe().

  What I did is below. Doesn't work. Keeps rebooting. Of course, I
have no console, so it makes things a bit difficult :-)

  At first, I thought it was the printf(), since there was no console
yet...

  Nope. This is part of a desire to make slightly embedded NetBSD
easier to do. I just care right now about doing "remote" automated
ipsec testing, and kernel debugging. (KGDB remote comes later,
although I guess it would be useful to debug this). For my immediate
need, configuring vt0/pc0 out of the kernel works fine, but I think
that this should be easy...

void
pccnprobe(cp)
	struct consdev *cp;
{
	int maj;
	int keyboard;

	keyboard = 1;

#ifdef PCCONS_ALLOW_FAIL
	/* Enable interrupts and keyboard, etc. */
	if (kbc_put8042cmd(CMDBYTE)) {
	  /* Flush any garbage. */
	  kbd_flush_input();
	  
	  /* Reset the keyboard. */
	  if (!kbd_cmd(KBC_RESET, 1)) {
	    keyboard = 0;
	  }
	}
#endif

	/* locate the major number */
	for (maj = 0; maj < nchrdev; maj++)
		if (cdevsw[maj].d_open == pcopen)
			break;

	/* initialize required fields */
	cp->cn_dev = makedev(maj, 0);
	if(keyboard)
	  {
	    cp->cn_pri = CN_INTERNAL;
	  }
	else
	  {
	    cp->cn_pri = CN_DEAD;
	  }
}

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