Intellivision II s-video mod?

[RGB_Gamer]

Has this ever been done and if so, how?

[mimo]

8bitdomain did a composite mod, not sure of any s-video mods being done

[jsoper]

The video chip has 4 digital outputs that go through a resistor ladder (poor man's DAC) to form composite. If you want s-video, you'd have to replace the video chip with your own. An FPGA might be fast enough, dunno.

[intvnut]

The video chip has 4 digital outputs that go through a resistor ladder (poor man's DAC) to form composite. If you want s-video, you'd have to replace the video chip with your own. An FPGA might be fast enough, dunno.

 

The AY-3-8915 Color Processor doesn't run very fast--NTSC colorburst * 2 as I recall. You might even be able to do this with something as simple as an EPROM feeding a resistor ladder. The biggest complication is figuring out what values to put on the chroma and luma channels.