Date: Fri, 08 Feb 2008 13:12:43 -0700 From: Scott Long <scottl@samsco.org> To: "Bruce M. Simpson" <bms@freebsd.org> Cc: current@freebsd.org Subject: Re: boot0sio working for anyone? Message-ID: <47ACB7BB.7090305@samsco.org> In-Reply-To: <47ACAE62.2060706@FreeBSD.org> References: <20080208185405.GA1479@roadrunner.spoerlein.net> <47ACAE62.2060706@FreeBSD.org>
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Bruce M. Simpson wrote: > 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. > Yeah, unless the BIOS provides traditional SIO emulation via USB (similar idea to providing tradition AT keyboard emulation via USB) then boot0sio won't work. It's not very feasible to put a USB stack into the early boot loader anyways. It's somewhat possible (at least, using a chained boot loader), but not very feasible. Scott
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