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I think that the eyes, nose, and mouth are each controlled by one 1.5volt C battery. The bigger issue is -- you can't actually just flow power through them to get them to move. https://www.youtube.com/watch?v=34cfkA9HlXk Uh... that hypothesis is not supported by the video at all. For one, there's n...

The first test is going to be -- can I get power to flow from the NES to the motors and move the eyes? Not without exceeding what you're allowed to draw from the NES's controller port. Right now, I'm trying to find a Teddy Ruxpin that has a cassette player that is truly broken. I don't want to rip ...

It can be reverted! To dump the cart, you'll either need to desolder and disconnect one side of the resistor (outlined in purple)
or short out the capacitor (outlined in white).

To revert it ... just undo that.

From what I'm learned, when PPU is writing to palette, NESRGB just cheats PPU and backups the data in its palette RAM. So that the real color can be retrived from this index table and a index -> RGB color LUT using EXT0~3. Am I correct? Yes. Specifically, the NESRGB and HDNES keep track of the orig...

I'm working on a small project where the main for my game is in NMI. It got me thinking, is it possible if your NMI runs too many instructions, could the NMI interrupt again while you're already executing code? Yes. If so would the remedy just to disable and re-enable NMI every time you enter the N...

when the last code "sta $2007" is executed (or is executing? I'm not sure...) on the CPU, 0 is asserted on PPU./CS indicating the PPU being selected, $7 is asserted on CPU.A0~CPU.A2 indicating the PPU register $2007 being selected, 0 is asserted on CPU.R/W indicating the register $2007 is being wri...

... Two bad 2A03s? How cursed. I have a page on the wiki here about Famicom/Famiclone/NES CPUs: https://wiki.nesdev.com/w/index.php/User:Lidnariq/Known_CPU_revisions The UA6527 would work with some caveats, but even though the photo you have there says only "UA6527", the listing says "UA6527P" which...

Those are copy protection ICs for specific Namco Vs. System games. I believe nothing else uses them.

user "lupin3rd" has a copy of Vs. RBI Baseball, which is what uses the 127. They did a simple test for me over here.

What version CPU and PPU on are the existing board? As far as I know, you should only need to swap out the CPU - I don't know of any incompatibilities between different revisions of the NTSC CPU and PPU, but you could help us find out if there are any

BokuNES wrote: ↑

Mon May 25, 2020 10:43 pm

- the "/RST" pin is high
- the "M2" pin is always high

That's very bad and implies the CPU is broken. Sorry!

Unfortunately, there isn't quite enough information for me to be confident about reverse engineering this board. It might be mapper 62 or mapper 225, or it might be yet another that's similar but different. If you're willing to sit down with a multimeter and measure continuity I can do the rest. (se...

Super cheap 5V logic probe: +5V --- blueLED ---+ +--- 4.7k --- probe gnd --- blueLED ---+ You could replace the blue LEDs with white ones, or two red/orange/yellow ones. If one LED lights, the probe is connected to ground. If the other LED lights, it's connected to +5V. If both LEDs light you've got...

...I'm reading the Wikipedia article on deinterlacing and I can't see anything about filling in the blank lines in a field with interpolated values (anything from linear to CRT scanline emulation), while maintaining the intended position of the lines in each field to avoid bobbing. Has this been tr...

Oh, no, that's to make it searchable for future me. I'm using the photos of the PCBs.

paste the second game at the end of first, then save it. Or I use second method with command line, like : copy /B "game1.sfc" + "game2.sfc" two-hirom-games.sfc In this case, where you are combining two 512KiB files to make one 1 MiB file, and placing the result in a 1MB UVEPROM that's 1048576 x 8 b...