Date: Mon, 25 Mar 1996 09:23:41 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: hardware@FreeBSD.ORG Subject: Re: Intel P-Overdrive and Opti chipsets? Message-ID: <199603251723.JAA04977@GndRsh.aac.dev.com> In-Reply-To: <199603251347.AAA29950@genesis.atrad.adelaide.edu.au> from Michael Smith at "Mar 26, 96 00:17:35 am"
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> > Just wondering if anyone out there is using an Intel PODP5V > (83MHz P Overdrive) in a 486 board based on the Opti 82C895. > > I've got one here that won't work unless the internal cache is > disabled, however that yields performance around 1/5 that > achieved with a 486DX2/66. > > Any ideas? (Anyone got one of these bastards working at _all_?) I have an idea, it is called WB cache coherency, and it probably was not implemented correctly on your motherboard. Does your bios only allow yot to disable the internal cache, or can you set it to write through mode (like the 486 was). Several motherboards have this as a jumper on the board. This is a common problem with the PODP processors :-( -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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