I've used several types of OSD (on screen display) chips in the past. For a
while the most common types were Fujitsu MB88323 ,88325 and Mitsubishi
M50554 ect.  I still have documentation for these types and probably have
some parts floating around.  These are fairly easy devices to use and have
SPI interfacing to a micro.
They offer up to 12 lines of 24 character text.  Overlay is possible in
monochrome.

If you want to discuss it more send me some e-mail directly.

Regards.




At 11:25 AM 3/5/97 -0500, you wrote:
>Hi:
>
>My PIC will be doing other things, so I'd like it to be off
>board. Overlay (i.e. being able to insert text into a pre-
>existing video signal) is a requirement.
>
>The 'chips' I am refering to are in many (most) TV's today...
>the type that can overlay closed captioning or various TV
>functions (like your volume setting and channel). All
>the various functions (sync seperation etc) are already
>done for you. Generally you talk to them via a IC2 line.
>
>What I am asking is if anyone has used any of these with
>PIC's and what there experince's were. As this is not
>a specific PIC question, I might be best asking this on
>sci.electronics. But since my target processor is a PIC,
>I thought I'd start here :-)
>
>Thanks!
>
>Regards,
>
>------------------------------------
>| Jeff King      Aero Data Systems |
>| jeff@mich.com  P.O. Box 510895   |
>| (810)471-1787  Livonia, MI 48151 |
>|F(810)471-0279  United States     |
>------------------------------------
>
>
******************************
Richard Katezansky
Tangent Electronics Ltd.
Montreal, Canada
******************************