Lee, I'd like to see that and many others would as well. 18Fs have lots
of RAM so that is no longer an issue. Dig it out and post it. Schematic
too if possible.

--Bob

Lee McLaren wrote:
> Hi Bob,
>
> If you only need single colour charaters you can get 64 in one line across
> using from memory a 16c73 running in spec. They are a bit hard to read with
> the res of the tv monitor but the quality of the output is spot on.
> Lots of tricks involved but worked very well, long time ago I wrote a time
> stamp to overlay on video, not sure if I got overlay sync to work but it was
> creating its own sync etc.
>
> Let me know if intrested and I will try to dig it up.
>
> regards
>
>
> Lee McLaren.
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Bob Axtell
> Sent: Saturday, 10 July 2004 10:58 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE:] Video overlay question
>
>
> Look at Mitsubitsi (sp?) MB35060-002SP. But I'm told it is being
> dropped, too, available now only in DIP.
>
> I designed the STV5730A into literally thousands of active products.
> Yet, not only will ST not manufacture it anymore, they won't license it
> so that smaller chip makers can make it, either. I and other designers
> have begged ST to continue the product, but to no avail.
>
> Its a serious problem. Phillips has a few products based on the 8051
> with a small overlay generator, and one catches glimpses of a Japanese
> source here and there; Zilog has some but the characters are much too
> big for law enforcement (my application). I was hoping the DSPic would
> be capable of doing something, but the PSPic's speed is nowhere near
> fast enough to directly write to the screen. Even the Ubicom is too
> slow.
>
> Using a FPGA and an LM1881 (timing extractor), an 18F PIC can control
> the writing of pixels into an NTSC or PAL screen. Its just a lot of work
> and it takes a lot of board space, too.
>
> Let us know what you run across.
>
> --Bob
>
> fred jones wrote:
>
>>Hi all,
>>I am interested in overlaying text on a video source.  The STV5730A fits
>>the
>>bill perfectly.  The only problem is that it is discontinued.  Does anyone
>>know of a chip that can be interfaced to a PIC and overlay text on a video
>>source like the STV5730A?  I haven't been successful finding one except
>
> for
>
>>the BU5963AS.  Can't find anything on that one except a datasheet...no
>>source for it though.  Thanks for any help.
>>FJ
>>
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>
>
>
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