Search results

The "Wii U that's basically a giant DS" is pretty much the immediate idea that comes to mind for everyone when the concept of a Wii U portable is brought up. Its the immediately obvious formfactor. The issue is that, as of writing this, at least in a portable form, the Wii U is overall a worse...

So awesome. Have you considered a version 2 where you stack a disc drive on top of the heatsink like a GameCube?

Aaaaaa this is so frustrating. They should have just kept integer scaling and over-scanned the pain away. 40 horizontal pixels and 30 vertical pixels cut off is 20 and 15 on each side, which is the equivalent of 10 and 7.5 pixels cut off for a 640x480 image. Every single game that system can...

It is within the VPP map (0x42) of the ADV7280 and ADV7280A. The register is 0x5A. You want to set bits 3 and 4 to 0 to disable the smoothing filter and enable simple line doubling. So as an example: 0x42, 0x5A, 0b00011010 - Default values for the register. "Smoothing" line doubling behavior...

Artificial scanlines are proving to be much more difficult than I anticipated. Since pure software isn't an option, I have been experimenting with hardware solutions. The principle of artificial scanlines is simple: every other line, the line is totally black. On paper, this should be simple...

I had an idea to implement artificial scanlines with no additional hardware by turning the DACs on and off every line. I ran the hsync line back to a gpio of the pico, and ran an interrupt to send an i2c command to toggle the red and blue DACs on and off every hsync pulse. (Note: I left the...

After many late nights of troubleshooting to no success, the line doubled output still looked awful. So I reached out to the ADV7280A man himself: Mike Chi of RetroTink. I knew he would have the answers, but he's a busy man and I wanted to wait to reach out to him until I reached the end of what...

Making a basic PCB is quite trivial, no doubt. But PCB design is an art and a science, with a near infinite skill skill ceiling. From high speed signaling with impedance matching requirements, to power supply layouts, to EMI considerations. A lot of skill goes into the more advanced stuff...

While not impossible, this is going to be a challenging project. Its important to note that "Taki Udon" isn't exactly the one designing/engineering/making these products. From the looks of it, his company is really a daughter brand that is under a very, very large china-based company. His role...

Potentially, but I worry it may be a -.35v to +.35v swing rather than a 0v to .7v swing at half amplitude, as pb/pr are differential signals. Would need to do something a little more complicated. Pretty tricky. All else fails, I can stick an analog transcoder circuit on the input stage.

The ADV7390 has a "SD progressive" mode, which what us gamers refer to as "240p". As you can assume, when this is selected, it makes the chip output 240p, which is 480i without alternating fields. If you send a 240p signal into this chip, and do not enable this mode, the outgoing 240p signal...

Finally sat down to finish assembling the PCB! No obvious issues, so it was time to start on the software side of things. I have a new secret weapon for this project: a wonderful, brilliant girlfriend who is a full stack software developer. Hello World! It works! So happy I didn't make any...

What about the 2 aux pins (SBU1/SBU2)? Could 4 gcc data lines be muxed down one or 2 of those wires? Or just send 1 or 2 controller data lines with no muxing

Correct. For my line double passthrough idea to work, it would need to be RGsB, or sync on green. Because it would be treating the "green" line like luma, where sync would be. So you would need to extract sync (assuming its sync on composite/luma), attenuate it with a resistor (assuming its...

Please do not double post. Use the edit button instead if you need to add more after your previous message. Sync processing takes place regardless of if color processing is taking place. It is necessary for line doubling, after all. If I am correct about the RGB passthrough line doubling...

YPbPr and RGB are electrically similar and compatible signals. It is the same data, but a matrix calculation away. On RGB equipment, you can pass through YPbPr signals, and vice versa. If you were to send it an RGB signal while it was in YPbPr mode, and try to spit it out as Composite or...

Hello! Not much news on this front. I have the boards and parts in hand, but need to take the time to finish assembling one. Not sure when I will get around to it, but hopefully soon!

Wow this has a lot of potential here. Here are a few features I would love to see implemented: -Native 240p support (rather than 480i, sometimes called weird names like double strike, progressive standard definition, and non-interlaced standard definition) -RGBS (combined composite sync rather...

First, please don't Necro old posts. Make a new thread for new issues. Second, I believe you installed the screens ribbon cable upside down. Try removing it, flipping it, and reinserting it. Third, most importantly... You should IMMEDIATELY disconnect those lipo batteries from the screen and...

0% "Because it's useful" 100% "Because we can"