Date: Wed, 21 May 1997 14:05:21 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: imp@village.org (Warner Losh) Cc: msmith@atrad.adelaide.edu.au, dfr@nlsystems.com, se@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: Backwards compatibiliy for isa_driver Message-ID: <199705210435.OAA08935@genesis.atrad.adelaide.edu.au> In-Reply-To: <E0wU33f-0006Cf-00@rover.village.org> from Warner Losh at "May 20, 97 10:31:27 pm"
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Warner Losh stands accused of saying: > In message <199705201317.WAA02812@genesis.atrad.adelaide.edu.au> Michael Smith writes: > : It means that "ISA" instances of a device can only be expected in the > : range 0x100-0x400, but that if the motherboard chipset is broken or > : old, probes at higher multiples of the device's address may still show > : it up. This is not normally a problem, as you only go above there for > : EISA/PCI devices. > > I know that my 8-bit serial cards show up at the same address that my > 16bit S3 uses, so I can't have a cua3 on this machine.... The 8bit > card doesn't have the address lines to decode things any other way... Uh, no, this is a problem with the 8514a chipset that the S3 emulates in that it was desiged for Microchannel but maps down over the "com3/4" addresses on ISA systems. > Warner -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[
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