So, if MultiAV port can output progressive signal? Everyone will say impossible, contrary to many people's surprise, the answer is yes.
We know, PAL GC's MultiAV port can output 15Khz RGB signal, if you forced output progressive signals, GC will automatically detect whether the cable is inserted in DigitalAV port, if the detection returns a true, then output progressive signals, Otherwise, regardless of the conditions, GC never output progressive signal.
So, if you want output progressive signals from MultiAV port, the most basic condition is the detection of whether the cable is inserted in DigitalAV port. Of course, the easiest way is to directly plug a component cable, but you probably like most people do not have the rare cable.
DigitalAV port pin out:
Details： http://gamesx.com/wiki/doku.php?id=av:nintendodigitalav
It can be found, Pin1 is used to detect whether the plug cable is inserted (1.8V means "inserted", grounded or floating means "no inserted"). So, it's easy to handle, we can give a 1.8V signal to Pin1 to simulate inserting component cable. GC internal power module output 1.9V, it‘s closer to 1.8V and can be used:
Short 1.9V and Pin1, GC with RGBS connected to the monitor and boot, first the GC boot menu is interlaced, after into Swiss, the screen flashed, we are happy to see, the monitor OSD info has become 576P：
However, although we've got a progressive picture from MultiAV port, but the picture is not perfect, maybe red is missing. After inspection, it should be a problem in sync signal, and it causes red missing.
PAL GC MultiAV port has no independent sync pin, the sync signal of RGB is extracted from composite video, I found that the composite video signal disappear while output progressive signals. (or become very very weak, I guess. Use composite video signal to monitor while output progressive, monitor will prompt "no sync", and has a very blurred image.)
From above research, GC will turn off composite video while output progressive signals, so it will affect RGB sync signal and cause the screen not normal.
I hope there is someone who offers more suggestions to make the progressive picture perfect from MultiAV port, so we can say goodbye to component cable and DigitalAV port.
