From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Tue, 6 Oct 2009 18:16:19 -0400 To: 9fans@9fans.net Message-ID: In-Reply-To: <<18f3fced1ebb90eb9c977b47bbcce424@vitanuova.com>> References: <<18f3fced1ebb90eb9c977b47bbcce424@vitanuova.com>> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] /sys/include/ip.h 5c(1) Topicbox-Message-UUID: 828e4d1e-ead5-11e9-9d60-3106f5b1d025 > >Just like you wouldn't have wanted to redo the microcode > >in your Vax 11/750, even if you could have. > > i thought several universities did modify the microcode in various ways, > to test some research ideas, or just to improve things. like this one http://portal.acm.org/citation.cfm?id=1007771.55619 i had thought the purdue dual-processor vax had microcode changes, but indeed it did not. this machine for all the world looks like a modern intel i7 or amd opteron system. the issues discussed are also pretty much the same today. http://computer-refuge.org/classiccmp/dp_vax/dual-vax11-780.pdf - erik