Date: Thu, 25 Oct 2007 14:14:42 -0700 From: Sean Bruno <sbruno@miralink.com> To: Larry Baird <lab@gta.com> Cc: freebsd-hackers@freebsd.org, Jeremy Chadwick <koitsu@FreeBSD.org> Subject: Re: Serial speed for boot device selection prompt Message-ID: <47210742.9000801@miralink.com> In-Reply-To: <20071025183553.89715.qmail@mailgate.gta.com> References: <20071025183553.89715.qmail@mailgate.gta.com>
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>> If you want serial capability in boot0, you should set >> BOOT_COMCONSOLE_SPEED=115200 in your make.conf. After you do that, >> you'll need to rebuild the boot blocks. The procedure for doing that is >> step 4 of Section 24.6.5.2 in the Handbook: >> >> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html >> > > The BIOS call that boot.S is using (int 0x14) only supports a maximum > speed of 9600. To get speeds greater that 9600, it needs to do the > I/O itself. There used to be a version floating around that did this. > I have a extemely modified version that uses this method. If you can't > find a version that does this, let mw know and I'll see if I can cleanup > what I have. > > Larry > > Thanks, that at least confirmed my theory while reviewing the assembly that boot.S was not capable of more than 9600. I'll look around first, but may request the code later. Sean
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