On Tue, 23 Jun 1998 17:45:21 +0200, Erik Maas wrote:
>Here are some idea's about the color burst :
>
>As far as I know you can adjust the color burst phase with it.
>(Carrier that is send for a small time during horizontal sync to be able to
>demodulate the color information)
>If you have a RGB connection to your monitor, this would have no meaning.
>If a CVBS or RF connection is used, it COULD result in losing or disturbing
>the color information on your TV... (no damage)
>Probably it is only usefull for measuring purposes. (see if the PLL in the
>TV can lock to the color burst signal)
>
>At least for RGB this register doesn't make any sense.
>
>The times I tested this I hadn't studied electronics, so I didn't knew what
>to look for. I only used a RGB monitor. With a RGB monitor the color
>signal is directly on the RGB pins and not modulated in the video signal.
>
>If I have some time, I will measure it... Although, it's probably not very
>usefull. (Software that is monitor/TV dependant???????? Who want's that?)
As far as I remember V9938's color burst registers have effect on *only* its
built-in video-out. Since almost all MSXes use V9938 RGB signals to produce video-out
in
a separate encoder module there should be no effect. But if MSX uses V9938's video
out (NTSC color-encoding only, however it may be on 50 Hz) you can use color burst
registers for at least one purpose - making your picture monochrome :-)
-- EV
==========================================================================
(c) Egor G. Voznessenski: tubed audiophile, MSX maniac & Pendorian wannabe
E-mail: [EMAIL PROTECTED]
Homepage:
http://www.glasnet.ru/~msxegor/ - private homepage
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