rgb to ntsc pal circuit

[hoss48458]

I was looking for some datasheets the other day on this website http://www.alldatasheet.com/  and found some interesting info that I would like to share concerning a possiable 80 rgb to  ntsc/pal convertor.

http://www.analog.com/static/imported-files/Data_Sheets/AD725.pdf

Please download pdf to look at, and you will see that it takes the rgb output from the c128 and turns it into a composite video signal.

Mainly look at page 12 of the pdf file to see the proposed rgb circuit.

Also this takesthe rgb and puts it together and then puts it on a color subcarrier and then through timing adds it to the monocrome video signal coming out of the 128 rgb port together into a composite video signal, much like the 40 col video signal coming out presently, and it will work depending on the crystal you use, ntsc or pal.

I did more checking at the digikey website http://www.digikey.com/  and found that the ad725 is still being made along with the nessicary crystals and othe nessicary part needed to build this circuit.


Mine you I havent made one of thede circuits yet but thought I would put the info out there to see what other think about such a project, if if anyone is interested in getting it working and perhaps mass marketing it to others