Date: Sat, 23 Apr 2011 17:37:57 -0600 From: Warner Losh <imp@bsdimp.com> To: perryh@pluto.rain.com Cc: lankfordandrew@charter.net, hackers@FreeBSD.org Subject: Re: scd and mcd Message-ID: <A3D64DC0-58C3-451B-B85F-0072BB0697F2@bsdimp.com> In-Reply-To: <4db35e8a.R5LDMfg8cygIRbfF%perryh@pluto.rain.com> References: <4DB3142A.4000807@charter.net> <1E3F5B85-5A1A-4118-A9D8-932F46619C79@bsdimp.com> <4db35e8a.R5LDMfg8cygIRbfF%perryh@pluto.rain.com>
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On Apr 23, 2011, at 5:19 PM, perryh@pluto.rain.com wrote: > Warner Losh <imp@bsdimp.com> wrote: >=20 >> mcd and scd are ISA-only devices ... They were important for the >> 386 (now not supported) and 486 machines. Since the 486 machines >> in question maxed out at 32MB, and 8.x has trouble running in 32MB >> on x86, I'm guessing there aren't too many 486 SX/DX machines >> running 8.x. >=20 > 486 were the last for which ISA was the primary bus, but ISA was > still present (bridged from PCI) on most Pentium systems and common > at least as recently as Pentium-II. (I don't have a disassembled > P-III handy to check whether it has an ISA slot.) Most Pentium II and newer systems had IDE connectors on the motherboard. = Many of the Pentium I ones did too. Only if you didn't have IDE = connectors on mobo would you be likely to consider one of these CD's. = Also, I think they topped out at 4x or 8x speed since they had a custom = interface. Warner
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