Date: Wed, 6 May 1998 01:33:45 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: mike@smith.net.au (Mike Smith) Cc: tlambert@primenet.com, hasty@rah.star-gate.com, chuckr@Glue.umd.edu, luigi@labinfo.iet.unipi.it, Nicolas.Souchu@prism.uvsq.fr, freebsd-hackers@FreeBSD.ORG Subject: Re: ISA PnP / snd PnP developments? Message-ID: <199805060133.SAA21785@usr02.primenet.com> In-Reply-To: <199805052213.PAA00806@antipodes.cdrom.com> from "Mike Smith" at May 5, 98 03:13:38 pm
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> > Making INT 10 calls is generally a bad idea. > > > > It requires taking down most of the outstanding operations manually > > from the kernel side, in the expectation of CLI/STI/etc.. > > Given that the calls in question run inside a VM86 penalty box, most of > your qualms here are fundamentally invalid - suspension of interrupts > etc. by the video BIOS isn't going to be a problem. You must have missed the part where I talked about trapping STI/CLI to a VMM. You can protect STI/CLI (and you should); however, doing so may introduce a number of problems in frequency syncing with some monitors after a mode switch. I have a KFC monitor that would require you to turn it off then on if the card missed a blanking interval, for example. At a minimum, you will tend to look crappy -- exactly the thing the vendors BIOS writers were trying to avoid. "Works fine under DOS/Windows" is very annoying to refute with "your hardware sucks". Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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