Date: Sun, 22 Sep 1996 15:59:15 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: terry@lambert.org, jgreco@brasil.moneng.mei.com, brandon@glacier.cold.org, freebsd-hackers@FreeBSD.org Subject: Re: splash-page on bootup.. Message-ID: <199609222259.PAA01275@phaeton.artisoft.com> In-Reply-To: <199609221100.UAA20269@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Sep 22, 96 08:30:32 pm
next in thread | previous in thread | raw e-mail | index | archive | help
> > > You're in a difficult situation... even a static GIF image would probably > > > be difficult because you don't know what you have for console until you > > > have probed the video.. animation I would think is out of the question > > > due to the way I understand the kernel works during the probe phase. > > > > Animation is possible using color register cycling. This is how the > > "startrek" bar of the Microsoft "Plus! Pack" is animated. > > The problem with animation during startup is that during the device > probes (the bits that the original proposition was trying to cover > with the splash (bad idea IMHO, but I understand the reasoning)), you > can't guarantee that you will get your interrupt regularly to do your > palette cycles. The animation would be cheezy to say the least. I > don't actually thingk that animation is terribly useful. This is only because we are stupid and use DELAY() instead of a calibrated timer list of one-shot outcall functions. Using a spinloop is just inherently stupid. There is no reason why you couldn't interleave operations, other than the facts that DELAY() is a spinloop and the code is not written correctly to allow kernel preemption by timer outcall. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199609222259.PAA01275>