I'm trying to find out if their is a way to get H Sync and V Sync signals from the N64s mobo, and I havn't been able to find any information on the subject. I'm also wondering if anyone would have suggestions on methods to boost a 15hz signal to 31hz? This should probably give away what i'm attempting
I use an XRGB2+ myself. Check out the link below regarding how the get VSYNC and HSYNC from composite video using a LM1881N and a couple of AND gates: http://www.epanorama.net/documents/vga2rgb/vgamonitor.html Maybe you could use this and a multisync monitor that handles 15kHz or an external scandoubler? CF
what youre searching for is a sync splitter. i've used a LM1881 about 5 or 6 years back when i modded my n64 to output rgb. im not exactly sure why i had to split the sync. maybe i was using it with an amiga monitor that didnt accept composite sync, cant remember... oh yeah, and there are no n64s that output rgb, so you need to mod it first. afaik, this only works with early ntsc and french consoles. concering the sync doubling... no idea, never heard of such a thing. the first thought taht came to my mind was that you could design a circuit that generates a sync pulse on the rising and the falling edge of the 15khz sync signal. no idea if such a thing would work, though. and you'd have to take care of the voltage level translation to vga aswell. wont be an easy project unless you find schematics for something similar on the net. [edit] forgot that the n64 outputs interlaced video only. that means that you'd have to buffer half frames, then combine them to one and output that at 31khz. just forget about building such a device yourself and get a commercial product that handles the job.(composite2vga or graphics card with tv tuner/composite video input) the only problem is that displaying composite video on a vga monitor will look like crap. i dont know exactly why you want to connect your n64 to a vga monitor, but heres a suggestion: rgb-modding your n64, then connecting it to a commodore 1084s monitor will give you awesome picture quality and a crystal clear, sharp screen.(mainly because of the small screen size)
