Date: Sun, 24 Feb 2013 17:18:49 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Phileas Fogg <phileas-fogg@mail.ru> Cc: Oleksandr Tymoshenko <gonzo@freebsd.org>, freebsd-hackers@freebsd.org Subject: Re: Scrolling in framebuffer syscons Message-ID: <CAJ-Vmo=r%2BF4=ig%2BZduEutEsr1EbudZMcRLvZUZ3cp8JVvXJJVg@mail.gmail.com> In-Reply-To: <5129F54D.9040503@mail.ru> References: <511F879C.3030801@mail.ru> <51217854.8000508@freebsd.org> <5123D941.2050906@mail.ru> <51293505.1030706@freebsd.org> <5129F54D.9040503@mail.ru>
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On 24 February 2013 03:11, Phileas Fogg <phileas-fogg@mail.ru> wrote: > 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. Which you likely should do anyway, right? if you're going to be doing any kind of large-scale screen updating. Adrian Adrian
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