Re: Flyback

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From: Ilpo Ruotsalainen (lonewolf@iki.fi)
Date: Thu 13 Jan 2000 - 16:43:33 IST


On Wed, 12 Jan 2000, Chris Atenasio wrote:

>Would it make sense then to keep an internal timer, calibrated with
>vga_waitretrace(), and sync draws to that?  Lets see, 200,000 hz cpu /
>70 hz refresh gives ~2857 cpu cycles between refreshes.  Take into
>account that the retrace is a fraction of the refresh time, and you
>are dealing with somewhere < 2857 cycles, which is fine for something
>simple, but wont give you time to blit images.  Then again I may be
>calculating something wrong... 

200kHz CPU? Perhaps you meant 200MHz which is 200,000,000 Hz...Now that
would give a bit more realistic number perhaps ;)

--
Ilpo Ruotsalainen - <lonewolf@iki.fi> - http://www.iki.fi/lonewolf/


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