boot0sio working for anyone?

David O'Brien obrien at
Sat Feb 9 01:20:10 UTC 2008

On Fri, Feb 08, 2008 at 05:29:18PM -0700, cpghost wrote:
> Yes, but the other way around is possible with a little help from a
> patched or more capable BIOS. Such a BIOS could intercept the "display
> character" (int $0x10, ah=0xe), "check for keypress" (int 0x16, ah=0x1),
> and "get keypress" (int 0x16, ah=0x0) BIOS calls and reroute them to
> or from the serial interface.
> With such a BIOS, /boot/boot0 would run just fine, because the
> bootloader would be oblivious to this rerouting.
> Isn't it the approach taken by Soekris devices? These boxes have no

This is the approach taken by [most] server motherboards which offer a
serial console setting.  I don't use boot0sio on my MP Opteron systems.

-- David  (obrien at
Q: Because it reverses the logical flow of conversation.
A: Why is top-posting (putting a reply at the top of the message) frowned upon?
Let's not play "Jeopardy-style quoting"

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