Quote:
Originally Posted by Count Zero
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That device will not work. It doesn't output RGBI, it outputs analog RGB.
Unfortunately, it's fairly easy to go from
digital RGBI to
analog RBG, but it's a completely different thing to try and cram analog RGB into RGBI.
The problem is that RGBI is very specifically formatted to display preset colors, modulated by the Intensity Bit, which gives you a dark and light choice for one of each colors.
It's fairly trivial to make a device that takes the RGBI output from a microcomputer and output it as RGB because that's what happens inside the monitor anyways. Inside any RGBI monitor there is a circuit that "sees" the signal and decodes the colors with a matrix defined in hardware. It then converts it to an analog value to be driven by the output section of the monitor like any other TV.
The other way around is far more complex because it involves trying to digitize arbitrary analog video to fit inside the very limited color space defined by RGBI. It's not impossible, but it's a non-trivial problem and it would almost certainly introduce an undesirable amount of processing lag. The reason it's not a common adapter is that the use case is fringe enough that no one has risen to that challenge yet. Also, many RGBI monitors possess an alternative method of input which allows for analog RGB or at least YC (or s-video) connection, making it unnecessary.
I think it's an interesting problem, and it would be fascinating to see it done, but, again, it's not really practical.