Date: Sun, 24 Feb 2013 12:11:09 +0100 From: Phileas Fogg <phileas-fogg@mail.ru> To: Julian Elischer <julian@freebsd.org> Cc: Oleksandr Tymoshenko <gonzo@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: Scrolling in framebuffer syscons Message-ID: <5129F54D.9040503@mail.ru> In-Reply-To: <51293505.1030706@freebsd.org> References: <511F879C.3030801@mail.ru> <51217854.8000508@freebsd.org> <5123D941.2050906@mail.ru> <51293505.1030706@freebsd.org>
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Julian Elischer wrote: > > not sure if it's relevent, but remember that updating the screen mor ethan 50 > times a second is pointless. > I'm not sure if the curent video console does it but having the final copy only > done on 50Hz ticks can save a lot of copying. > Right, but then you have to handle VSYNC hardware interrupts and copy framebuffer data from system memory to video memory. regards
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