[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.

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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