Test the 5V VCC while the system is running with the SD2SNES inserted. You can safely test VCC level from the P2 controller port with a multimeter without opening the system. I don't have a controller pinout handy but you need to test between GND and VCC pins. If the voltage is dipping much below 5V, then either the power adapter is supplying insufficient amperage or the internal 7805 regulator needs replaced.

First party power bricks can go bad. Earlier this year, I replaced a stock factory N64 brick which would slowly dip the voltage until the N64 VCC hit 2.92V at which point the N64 would crash and reboot itself infinitum. Replacing the power adapter fixed my N64. For reference, the N64 runs a 3.3V VCC signal. If your SNES is dipping below around 4.5V internally, you're likely to encounter problems.

My multimeter skills are weak .

I'll give it a spin though... have to do some googling to see how to check vcc.

I looked it up. Set the multimeter to DC preset, 20V max. Touch the first and last pins on either controller port while the console is running. Choose a game from the flash cart with a lot of activity onscreen during the dem, especially mode 7 scaling, and wait about 20 minutes or so before testing. I forget which is VCC and GND, but it whouldn't matter. If you hook it backwards, your reading will be the same, just with a minus sign. A good regulator should fall between 4.95V and 5.05V ideally. If it's below 4.75V or above 5.25, I would recommend replacing the internal regulator. It is a simple fix but if you don't know how to use a soldering iron I would highly recommend letting someone else repair it. If the voltage is reading on the low end, the power brick could be at fault. The brick should supply between 7-11V to the SNES under load. If the adapter power dips below about 6.5V input, the regulator will be unable to maintain 5V to the console VCC, and individual components may start to glitch or operate abnormally if they dip below 4.5V. Higher supply volts to the 7805 and the console will appear to run fine for a while but stress the regulator and reduce it's life expectancy. I don't recomend using a (9V) adapter with classic consoles if the No load voltage (touch the probes to both sides of the barrel while unconnected) is above 11V. I have seen some unregulated adapters supply way higher than rated, to the point of being dangerous to the console's health. My Yobo NES/Genesis/SNES "universal" 9V adapter supplied 14 volts (13 under load). I trashed the brick and kept the tips to frankenstien together my own universal adapter.

I used a Radio Shack brand adapter (9V, 850ma) with 3 tips spliced on, a (+ tip) headphone miniplug for Atari, a (- tip) standard barrel connector for Famicom/NES/Genesis/Turbo, and an inverted connector (+ tip) for the SNES. The no-load voltage on the 9V Radio Shack adapter is 10V and it runs six of my retro consoles (not at the same time obviously). The original power bricks I stored away to reduce wear and tear. You can try a Radio Shack 9V replacement although the large inverted barrel tip for the SNES may be hard to source. My local Radio Shack did not carry this plug last I checked. Modern laptop style plugs will appear to fit but the center pin is too thin and short to make connection. The 7805s in classic consoles are generally tolerant of reverse polarity (the console will not operate but it generally won't damage the 7805) but AC current like from a stock NES adapter could kill the regulator or induce a bad ripple voltage to the motherboard due to the stress of switching on and off at 60Hz. To be safe, always test with a multimeter to verify that the polarity matches the plate on the console before you plug in. Also beware the Atari Jaguar uses a positive tip adapter identical to Genesis/NES plug but with reverse polarity. Due to Atari's unconventional power regulating circuit, hooking reverse polarity to a Jag will kill it! I believe many Jag consoles died this way because gamers with multiple systems accidentally grabbed the wrong plug.

Tried F-Zero.  Running without a game the power stayed at a contant 4.95 but when the demo started it dropped to the mid 3's (but quickly recovered and stayed at 4.95).
 

Glad I could help. Your power brick is not supplying enough current. Try getting a replacement adapter.

 

I noticed that in the ultimate mappers download currently linked in the OP there is no "#' save slots folder. I created my own, but the main download could easily be updated with slots for 3-D WR, 720, 1942/3, 10 Yard Fight & 8- Eyes.

Side question - are there any clones on which the PowerPak is confirmed to work?

No. But I had good success running all 3 Everdrives in my Super Retro Trio. My SRT even plays SMS games...



 

I get the error "bad file header" and can not proceed. I was wondering if there is an easy way to find out a rom has a badheader by just looking at the file. I know some of the games work on emulators.

Did you get the error after you selected a game, or is that the first/only thing you see?

Most emulators will tell you if the ROMs mapper/header is bad. In fceux you can go to Help>Message log, if there is something wrong it will tell you whats wrong and what it did (if anything) to fix it.

You can then use a hex editor to change the header to what it needs to be. Here is everything you need to know about headers:

http://wiki.nesdev.com/w/index.ph...

I personally do not know. Someone shared a rom with me. He said that it worked on a emulator before he sent it to me. I tried the game. It said bad file header. 

There's a lot of ROMs with bad headers floating around on the internet. My advice would be to let someone check it with a hex editor, or use a repair tool, or if it's a standard released game, get a clean copy from the No Intro set.

With ROM hacks, it is possible soeone forgot to apply changes to the header. I'm sure some gurus around here could fix it for you if you asked. Also note some hacks are known not to run on real hardware. The hack itself might be a lemon if it was only tested in emulators.

Gotta do it the hard way.... trial and error....
 

If you got reliable verified, properly formatted ROMs in the first place,you wouldn't have issues.

I have never updated the firmware of my Super Everdrive or Everdrive MD. I got them in 2010 I believe. Looking at the manuals on krikzz.com, the only thing I'm missing out on is Game Genie integration. I don't really care about that... Do you guys keep your carts up to date?

If there's some new feature I want or bugfix, then yes, I update it. Krikzz updates rarely break things. The lone exception being the vaporware update on the FC Everdrive. At one time he released an update to allow SD cards smaller than 4Gb, and probably some other stuff under the hood, very early in release, which broke compatability with add-on boards such as CopyNES or HDMI-upgrades. It was a little NES ROM with mapper 255. It got pulled from the site shortly after launch. Some gurus have reportedly produced a retrograde update that restores the original firmware but it hasn't been released.

I think the ED snafu is something that could easily be fixed by either Krikzz releasing an N8 patch or the Game Tech guys releasing a patch for their add-on. Currently CVIII is also broke but that is beside the point.

 

Anyone have quick tips about using nestoy? Trying to fix a few roms with bad headers and when I run the application, a command window pops up for a split second then disappears.

Probably command line interface. I wish programmers would release tools with proper GUI. I'm not a programmer and I absolutely loath command line anything. Would it really kill them to make a prompt box?

Sometimes you can write a .BAT file to go with your program so you only have to type the verbage once and use the .BAT over and over again...

 

Well for the meantime I will just try to use different files, it's only about 4 games at the moment.

anyword on PowerPak 2? Krikkz just did an update for his IOS. I am wondering if bunnyboy will offer something better!

I believe the AVS is top priority right now...

 

What is this AVS everyone keeps speaking of? Havn't been on the forums in a couple months.

 

Only the greatest console ever concieved, now available in glorious HD!

That is at least until Kevtris creats his all-in-one FPGA that plays everything from Fairchild Channel F to Neo Geo, with SD card, cart adapters, and the kitchen sink too...
http://atariage.com/forums/topic/...

Ive been wanting to get the N64 everdrive for a while now, as I have purchased all the games for that system I want to spend money on, but there are still a bunch I would like to play here and there. How well does that thing work? I have tried emulating N64 games on my PSP and PC but they never work.