[Coco] Source code for High Speed Bit-Banger I/O
Roger Taylor
operator at coco3.com
Sat Apr 28 08:54:13 EDT 2007
At 02:52 AM 4/28/2007, you wrote:
>After doing a little googling, I think its pretty likely that
>894886.25 is the correct value. That is exactly one fourth the NTSC
>colorburst frequency of 3,579,545 Hz. I don't remember where I got
>that other value.
>
>Reference: <http://en.wikipedia.org/wiki/Color_burst>
>
>I will adjust my calculations and see if it affects any of the cycle
>counts I used.
>
>Darren
The margin of error was so small that it doesn't even add up to whole
cycle over the whole 10 bits for a character, but if we're attempting
anything higher than 115.2 kbps it might matter.
--
Roger Taylor
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