Date: Sat, 15 Dec 2001 11:58:34 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: Hiten Pandya <hitmaster2k@yahoo.com> Cc: hackers@freebsd.org Subject: RE: boot0 Message-ID: <XFMail.011215115834.jhb@FreeBSD.org> In-Reply-To: <20011215092344.54636.qmail@web21110.mail.yahoo.com>
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On 15-Dec-01 Hiten Pandya wrote: > hi, > I found this piece of code in boot0.s, is it possible > if you could explain me a bit about it. > > .set NHRDRV,0x475 # Number of hard drives > > The hex value comes out to: 1141. > > Does that mean, that this is the amound of maximum > hard drives a user can have on FreeBSD? No. It's the offset in memory of the number of hard drives in the BIOS. The BIOS has a data segment at 0x40, and at 0x40:0x75 (whose physical address is 0x475) it has a byte which is a count of the number of hard drives installed. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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