Date: Fri, 07 Jan 2000 14:29:20 -0700 From: Warner Losh <imp@village.org> To: De la Cruz Lugo Eric <eric@iteso.mx> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: HARDWARE.TXT specific for Alpha? Message-ID: <200001072129.OAA88896@harmony.village.org> In-Reply-To: Your message of "Fri, 07 Jan 2000 09:32:58 CST." <Pine.BSF.4.10.10001070928460.83671-100000@iteso.mx> References: <Pine.BSF.4.10.10001070928460.83671-100000@iteso.mx>
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In message <Pine.BSF.4.10.10001070928460.83671-100000@iteso.mx> De la Cruz Lugo Eric writes: : Thanks for the info, in X86 Architecture the RAM max size is 4 GB (check : ftp.cdrom configuration :), i thinked that in Alpha should be bigger. No. That's not right. PPro and newer support 36 bits of physical address, which leads to a max size of 64G. The biggest Mobo I've seen for x86 is 8GB (and that was second hand info about a micron server mobo). FreeBSD can't go above 4G w/o rewriting all DMA customers to use bus_dma, which are the network drivers iirc. The pmap layer would also require a fair amount of work as well. But I drift from the charter of this group now :-) Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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