nesdev.org

FAK.
Good to know. I was actually tracing that up in Inkscape so that I had a nice svg/PDF of it. :\

Although I get why you say that, this portion of the block diagram leaves me scratching my head then.

Starting to make a little more sense out of the block diagram. I think. PPU pin 25 should have continuity to pin 37 on the cartridge connector, right? Wanted to sanity check myself, because I seem to be missing a whole lot of connectivity. According to this block diagram, I should have a direct conn...

I'm part of the way through this process, but I get stuck going from the "V"RAM at U4 to the PPU. I'm looking at the block diagram, and I'm getting a little sidetracked. Here's what I've sorted out so far: VCC all check out. PPU 40 CPU 40 U1 24 U4 24 U9 14 U7 16 U3 16 U2 20 Grounds all che...

I need to do some reading on the expansion port, because that would seem to make the most sense - however I saw something recently that really made me scratch my head. The NES "world class service" test benches had the expansion port available on side, and I think I was watching a video of...

The NES is basically "W"RAM <-> CPU <-> PPU <-> "V"RAM. When you're testing continuity, are you testing the correct side of the PPU for the RAM you're testing against? http://i.imgur.com/tUMvwwt.jpg I'm working on this angle now. Going to go trace by trace to see if there are an...

I did your diode test - but before that, I learned quite a bit about repairing IC legs. :\ The way that worked best for me was to get ahold of a zif socket for the ic, and then one leg at a time insert a spare LED or cap leg into the missing leg section, apply some no-clean flux, and then apply sold...

There's an easy way to check if the bond wire was not broken and there is connection between pin and internal chip core - set your multimeter to diode test, touch + of your probe to GND and - to the pin you're testing. If multimeter shows some value (other than infinity), then it wil probably be th...

re: using my sound input as an oscilloscope, everything I am finding is for windows. I'm a Linux and Mac user - so I either need to get that software running under wine, or I will have to play some games to get it going under a VM. That's still more than I was aware of before, so I super appreciate ...

Finding things that leave me confused, like the PPU diagram I have shows pins 14, 15, 16, and 17 as R, G, B and I assume sync (it's black). Yet from my pictures, it looks as though 14 and 15 were bridged, and 15 and 16 were bridged, and all 4 have continuity to ground, so that's what I reproduced a...

I'm a fool. A moron. I failed to heed the warnings that the PPU had some solder points that needed tons of heat to work, and rather than be more careful, I got in a hurry. I tore up traces, and broke pins off of my PPU. I have since gone through as carefully as I could and jumped all of the damaged ...