Did you ever though "would be good to get original analog output without additional board which is not easy to find?
After some experiments i've made it possible!
What you need is cheap HDMI-VGA converter like this:
I't important the converter must be very simple! It can be like simple small adapter with hdmi and vga connectors or like on picture. The converter on picture is preferable because you can easily disassemble it to add some mods like sync-on-green or add 5V power to pin-9.
Also you can easily check the chip. Known to work well chip: AG6200. It support all kind of video from interlaced 15KHz to progressive 1080p.
Besides the video, you also get analog Audio!
Today i've released Genesis and SNES cores where this feature is implemented. You need to update the MiSTer binary as well.
In Mister.ini put the option:
How it works:
Core sends original video to HDMI without any scaling, as-is. Then HDMI-VGA converter acts as a DAC for video and audio.
No any frame buffers are used in VGA converter, so it converts online.
Basically you get zero-lag video. Same as you would use VGA from I/O board.
This video is even better because you get 8bits per color while I/O board gives only 6bits per color. Audio output is also better than one used on I/O board.
It's still experimental feature, so i would like to ask everyone who has/bought such converter to test it and tell how it works.
features are supported over direct video:
- composite sync on HSync signal (set corresponding ini option).
- YPbPr (set corresponding ini option).
You will need to add sync-on-green circuit to VGA output if you need it (YPbPr requires it).
SOG can be very simplified. You just need diode (1N4148) and 1K resistor. Connection: from HSync -> anode of diode, cathode of diode -> resistor, resistor to Green signal.
SCART connection is traditional.
For SCART, YPbPr and SOG you need to use composite_sync=1
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