A minor problem is that Commodore monitors were built with a special "brown" circuit. Note this solution gives 16 "true" RGBI colors using passive technology (no power supply needed). (The photo is before I connected the mess of wires I should have taken a finished photo. I built it in a metal case, see photo below. As long as I was adding variable resistors, I replaced the 1.2k Ohm resistor (for the C128 Intensity line) with a combination of 470 Ohm (fixed) and 1k Ohm (variable) resistors I tuned it to 1.2k Ohm. I set them to about 250 Ohms as this seemed to drop the voltage down to what his converter needed. These are not shown in the schematic (may not be needed, depending on tolerance of VGA converter that you use). On the right is the male HD-15 connector that goes to your VGA adapter.īecause I don't own the VGA adapter he does, I added 1k Ohm variable resistors to all the VGA output lines (except ground). In the center is the pull-both circuit that adds Intensity to the R,G,B lines. On the left side is the male DB-9 connector that goes to the C128. I'm glad to report that it works! Below is the schematic diagram if you would like to build one yourself.
So first, Miro Karkus asked me to build an RGBI converter for use with his RGB to VGA adapter. This has been reported to provide acceptable results (both PAL and NTSC) with one major exception: you get only 8 colors! The converter has a 15-pin input, so the cable is needed to use with the 9-pin connector on the Commodore 128. That particular converter needs a special 9-pin to 15-pin cable. The easy way is to use an RGB to VGA adapter, such as one available from Ambery. This page is about a VGA solution (other solutions are S-Video and SCART). RGBI is similar to VGA, but uses different voltages and horizontal frequency which most VGA monitors do not like. This poses a problem for C128 owners due to the dwindling supply (and expensive shipping) of RGBI and CGA monitors (CGA is very much like RGBI). Unfortunately, the RGBI output of the VDC is not compatible with modern equipment.
Rgb to vga converter circuit diagram tv#
The VIC is easy to connect to common video displays (TVs and monitors) due to various widely-used outputs: Composite, Chroma/Luminance (S-Video), and RF (analog TV antenna). The VDC also supports video interlacing in hardware. It offers higher resolution than the 40-Column display of the VIC-IIe (8564 NTSC, 8566 PAL-B often called simply VIC). (Unfortunately there's a few Wii and GCN games that don't support progressive scan without hacks.The Commodore 128 features an 80-Column color display using an RGBI output via the 8563, known as the VDC. This particular cable doesn't do upscaling, so if your monitor doesn't support 480i, you'll need to use 480p. It takes the component video output (YPbPr) from the Wii, runs it through a transcoder chip, and outputs a VGA signal. I got a Hyperkin Wii/PS3 to VGA cable a while back and it works fairly well.
Best case is you'd get a monochrome signal with interference worst case is you'll get nothing. You can't simply connect a composite video line to VGA input and expect it to work. This was done as a cheap way to add color to TV signals without breaking compatibility with black&white TVs. (Red, Green, Blue, HSync, VSync some monitors do support CSync or Sync On Green, but that's besides the point.) Composite video is basically a monochrome video signal (like the Y signal on component), with the color added using a specially-encoded subcarrier. (Some monitors can handle 480i over VGA most can't.) The issue is that VGA expects all the signals to be on separate wires. They're just trying to save you a lot of heartache.Ĭlick to expand.It's not really the timing that's the issue.
Rgb to vga converter circuit diagram code#
You will probably have to write your own code for the IC because nobody wants to do what you're asking to do so the program isn't readily available.īy the way, no one is trying to be an asshole. There's a schematic but you will need to build a programmer to program that IC. The reason everyone is giving you links to buy something is because it is going to be way cheaper to buy the pre-made/pre-programmed adapter then to build a converter and programmer. I can find a schematic if you really want to do it yourself. To convert the signal you will need ICs and a programmer to program the ICs. There is NO WAY around having to convert the signal. It doesn't matter that the Wii outputs in 3 modes, the fact of the matter is you can't just wire a composite/component/SCART to a VGA cable and it magically works. But believe it or not, they ARE giving you good advice. OP - Everyone is jumping around your question and I know that's frustrating.
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