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Date Posted: 12:52:05 02/11/02 Mon
Author: Potter
Subject: Re: AGC S&H Component needs hardware expert's comment
In reply to: Ronald 's message, "Re: AGC S&H Component needs hardware expert's comment" on 00:12:13 02/11/02 Mon

Those nops are significant as they affect the overall timing of the code and make more difference with a PIC than
an SX in turbo mode. There should be the same number of cycles between makehline calls in the main loop for stable operation (ie so that all syncs happen at the right time intervals) so the place to change the timing is in makehline itself as this where the code is executing most of the time.


>I have disable all Inverting command in the source
>code.
>
>How do I know if the decoder software is displaying
>more lines that it should? I doubt the TV ouput is due
>to NTSC-PAL conversion movie. Even originally PAL TV
>program also has this white banding on top of the
>screen. But Once I have the VR control the AGC
>Voltage, there is no more white Banding on top of the
>TV screen. I would like to know if nops in the
>MAINLOOP routine and Begin routine important? I have
>deleted some to make the picture more stable. If I
>follow the original source code, I am gettting very
>wavy picture.

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