> What I don't know, and hopefully someone who may know the video signal
> better(Glenn?) could tell us, is if syncronization pulses are actually
> sent to the screen everyline. I am unfamiliar with the data format sent
> out in composite sync.
On the scope, I see the video signal shows up like this: (adventure
startup screen)
+0.75
_________________
XXX XXX
0 | |
| XXXXXXX------- ---------
| | |
-------
-0.75
< 4us ><4us ><4us >< 37 us >< 5 us >
< ~64 us >
Here I what I think these segments are:
HBLANK sync? ??? video image, one line ?????
color?
By timing, this repeats about 15625 times a second, probably actually
15720. the horizontal scan rate; so this should be 1 line of signal.
Unfortunitely I don't have nice enough of a scope to see what is going on
during vertical vsync though.
Could Glenn, (or someone else) give us a lesson in what the parts of this
signal are, and which parts the TV is actually responding to?
BTW, a television image shows up like this:
+0.75
_________________
XXXXXXXXXXXXXXXXXXXXX
0 |XXXXXXXXXXXXXXXXXXX|
| XXXXXXX-------XXXXXXXXXXXXXXXXXXX---------
| | |
-------
-0.75
Mark
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