Date: Tue, 5 May 1998 10:01:31 -0500 From: Jonathan Lemon <jlemon@americantv.com> To: Terry Lambert <tlambert@primenet.com> Cc: Amancio Hasty <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: <19980505100131.16512@right.PCS> In-Reply-To: <199805050739.AAA16950@usr02.primenet.com>; from Terry Lambert on May 05, 1998 at 07:39:23AM %2B0000 References: <199805032004.NAA01429@rah.star-gate.com> <199805050739.AAA16950@usr02.primenet.com>
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On May 05, 1998 at 07:39:23AM +0000, Terry Lambert wrote: > > We don't use bios calls for drivers however very recently someone checked in > > code to make bios calls which can come in handy for video adapters video > > modes. > > Making INT 10 calls is generally a bad idea. First off, let me say that I agree with this. I'm just providing more rope for interested developers. :-) Besides, wasn't it you who wanted an INT 10 disk-driver as a fallback mechanism? > It requires taking down most of the outstanding operations manually > from the kernel side, in the expectation of CLI/STI/etc.. But this is wrong. Our real-mode INT calls are done in a vm86 sandbox, so they never actually get their grubby hands on the actual PSL_I bit. This will probably break things that are timing sensitive, but I'd argue that those things are better suited for a real kernel driver anyway. [ snippage of timing-related issues due to interrupts being disabled ] -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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