Date: Thu, 22 Mar 2001 13:32:36 -0700 From: Warner Losh <imp@harmony.village.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: Takahashi Yoshihiro <nyan@FreeBSD.org>, sos@FreeBSD.org, jkh@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/etc MAKEDEV Message-ID: <200103222032.f2MKWb904841@harmony.village.org> In-Reply-To: Your message of "Thu, 22 Mar 2001 10:30:42 EST." <Pine.NEB.3.96L.1010322102513.10372A-100000@fledge.watson.org> References: <Pine.NEB.3.96L.1010322102513.10372A-100000@fledge.watson.org>
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In message <Pine.NEB.3.96L.1010322102513.10372A-100000@fledge.watson.org> Robert Watson writes: : It's useful to note that the primary source of problems with AD that I : have observed is overly agressive use of DMA instead of PIO for devices : that don't support it. I wonder if that's something we could be doing : better? The primary problem with the pc-98 architecture is that the I/O ports aren't contiguous. But it looks like the ide controller is. It is hard to tell since it still uses the shims. mse0: <Bus/InPort Mouse> at port 0x7fd9,0x7fdb,0x7fdd,0x7fdf irq 13 on isa0 ed3 at port 0xd0-0xdf,0x2d0,0x2d2,0x2d4,0x2d6,0x2d8,0x2da,0x2dc,0x2de,0x3d0,0x3d2,0x3d4,0x3d6,0x3d8,0x3da,0x3dc,0x3de irq 5 drq 0 flags 0x400000 on isa0 ed3: address 00:40:26:0f:0e:b1, type LGY-98 (16 bit) are two of the devices on my pc98 laptop running 4.3-beta. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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