Date: Tue, 17 Apr 2001 16:36:18 -0600 From: Warner Losh <imp@harmony.village.org> To: Soren Kristensen <soren@soekris.com> Cc: Chris Dillon <cdillon@wolves.k12.mo.us>, freebsd-small@FreeBSD.ORG Subject: Re: The ultimate board! Message-ID: <200104172237.f3HMbXI39392@harmony.village.org> In-Reply-To: Your message of "Tue, 17 Apr 2001 15:26:31 PDT." <3ADCC317.AAE544DD@soekris.com> References: <3ADCC317.AAE544DD@soekris.com> <Pine.BSF.4.32.0104171610170.19198-100000@mail.wolves.k12.mo.us>
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In message <3ADCC317.AAE544DD@soekris.com> Soren Kristensen writes: : As Warner said, there is only one kind of CF cards, but they can : operate in 3 modes, all required per the spec: PC Card memory : mode, PC Card I/O mode and True IDE mode. I'm running them in true : IDE mode. The CompactFlash spec is at http://www.compactflash.org/ I've personally used 7 different brands of CF card in true IDE mode w/o hassles using a home grown adapter. SanDisk, Simple, Peripheral Enhacement Corp, Viking, TDK and Hitachi. I've yet to find any that won't work in True IDE. I did get one bad batch of Simple parts, however. They just up and died after a few days of use. All of them in that batch wound up going bad within two weeks. The other 100 odd CF parts that we'd use had no such problems. FreeBSD uses PCCARD I/O mode when you plug them into a pccard slot. Most of the parts support memory mapping as well, but memory mode only seems to support mapping two pages in at a time. I keep hearing rumors that there's a away to directly map up to 64M of these cards, but can find no datasheets that give enlightenment. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message
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