boot0sio working for anyone?

Bruce M. Simpson bms at
Fri Feb 8 19:51:44 UTC 2008

Ulrich Spoerlein wrote:
> So, is boot0sio supposed to just work with a cheap USB->RS232 dongle at
> the other end? I don't know how this paragraph from boot0cfg(8) is
> affecting me.
boot0sio is wholly dependent upon BIOS support for addressing the 
on-board COM1 port. It is not intended (read: very unlikely) to work 
with USB dongles.

If your BIOS does not support the call that it uses, then the symptoms 
will be similar to what you've seen. Unfortunately there is just not 
enough space in the MBR to implement any workarounds for this.


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