Date: Wed, 26 Jan 2000 02:59:31 -0500 (EST) From: Lyndon Griffin <lgriffin@bsd4us.org> To: freebsd-sparc@freebsd.org Subject: Re: SS 470 info Message-ID: <Pine.BSO.4.10.10001260258320.32503-100000@ns.bsd4us.org> In-Reply-To: <Pine.BSF.4.10.10001252351260.61908-100000@beppo.feral.com>
next in thread | previous in thread | raw e-mail | index | archive | help
How does the 470 compare to the 600, in this respect? <:) Lyndon Griffin http://www.bsd4us.org On Tue, 25 Jan 2000, Matthew Jacob wrote: > > Not significantly different- just more- it's a 3rd level MMU extension to the > 2 level sun4c/sun4/sun3 stuff. On the older machines it was a resource > limitation of pte's mapped by PMEG (page map entry group). The sunray MMU > added SMEG (system map entry group) to map groups of PMEGs. > > If you mean "Is it different from other sparcs", i.e., sun4m/sun4u, yes- > sun4m/sun4u both have real memory page tables. The older sun machines were > more like the VAX- restricted amounts of SRAM to provide a multilevel TLB. > For the time an excellent but cheap design. With respect to flexibility, gawd > awful. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-sparc" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSO.4.10.10001260258320.32503-100000>