Date: Sat, 26 Apr 2003 23:45:42 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: John Baldwin <jhb@FreeBSD.org> Subject: Re: i386/loader compiled with NOFORTH Message-ID: <20030426204542.GD66677@sunbay.com> In-Reply-To: <3EA9ACB2.7D8504FF@mindspring.com> References: <XFMail.20030425120735.jhb@FreeBSD.org> <3EA9ACB2.7D8504FF@mindspring.com>
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--zaRBsRFn0XYhEU69 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Apr 25, 2003 at 02:46:26PM -0700, Terry Lambert wrote: > John Baldwin wrote: > > > Yes, figured this out by myself already. I've ended up > > > uncommenting the "hints" line in GENERIC config, everything > > > is OK now, and bzip2(1) also works, modulo the memory > > > restrictions -- only level 1 bzipping works that requires > > > ~250K of memory. > > > > > > John, is there a way to fix btx/loader/whatever so that > > > heap memory is not limited to 640K? > >=20 > > Not really. At least, not easily. We load the kernel up above 1mb, > > but we don't know how much memory lives up above 1mb and we assume > > that there is enough for the kernel and that's it. >=20 > You are limited to what you can access in real mode, without > Gate A20 (16M, at which point the address space wraps). >=20 Shhh, don't tell this anyone! ;-) A20 (21th address line) allows one to access up to ffff:ffff byte, that is (1M + 64K - 16) bytes of memory. Cheers, --=20 Ruslan Ermilov Sysadmin and DBA, ru@sunbay.com Sunbay Software AG, ru@FreeBSD.org FreeBSD committer, +380.652.512.251 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age --zaRBsRFn0XYhEU69 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+qu/2Ukv4P6juNwoRAu62AJ4mMBUWBbKTauFUb5+4LsAoJ+V0awCfZPH/ 2GihKXi4FORNKB8o6kuvtlc= =W7KW -----END PGP SIGNATURE----- --zaRBsRFn0XYhEU69--
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