nesdev.org

Got it working a while ago thanks a lot to all who helped especially mic_. I did just that I figured out how to get the breakpoints working found where it writes only once to 2100 and just replaced it with my register write and now starfox 1 runs at 57 mhz. What's interesting is in the config regis...

infiniteneslives wrote:Good corrections/clarifications. Not the first time magno's handwriting threw me for a loop either on that 3/8

Yep, my '3' is kinda weird XDD
Nice that those "schematics" helped you!

Magno, have you got a working schematic then for that battery+sram design you mentioned? Yes, I have. Here it is: http://img17.imageshack.us/img17/2442/nesdev.jpg Yoshi's island uses a small 8 pin chip for SRAM memory management with only 2 or 3 external components. The ones Nintendo used BA6129AF ...

You are talking about MX26L12811MC and I'm talking about MX29LV3211, nothing to do one with the other. The 29V3211 is pretty clear about all what I said before. Anyway, connecting this flash memory to S-DD1 doesn't guarantee it will work. S-DD1 reads from the flash to decode data or to pass-through ...

Aren't the 29L3211 chips 16-bit? How do would you wire it to run in 8-bit mode No, they aren't. You can set them in word or byte mode by tying pin 33 to GND or Vcc. Anyway, if they were 16 bit only, you could multiplex their output. Also, I'm not altogether convinced you could have safely used it i...

When you make your own board, you don't need any "adapter", since you make all "adaptions" in the board itself. And yes, I use 27C322, but I'm thinking of 29LV3211, which are smaller, 8 bits bus width, and less power consumption. It's the best way to overcome those space limitati...

Is star ocean so popular and valuable, would it justify making a cartridge (custom) that had provisions for 96 Meg's (3 x 32 tsop to 36mask) so long as no custom chips are used? Am I understanding this right? I forget who, someone wants to make a SO using a standard cartridge format without special...

I think I can understand byuu's GD7 memory map explanation, altough I wonder how he checked it is right, since I couldn't find any information on internet about ExtROM mapping in GD7. In fact, I tried to compare those two lines: <map id="rom" mode="linear" address="40-6f:000...

I solved the problem using 100nF decoupling capacitors.

Finally my board has not any pull-up, one 100nF ceramic capacitor for decoupling near each 27C322, another 100nF cap for SuperCIC, and one 22 uF electrolytic capacitor near Vcc to decouple noise in the whole board.

Ok, I have solved the problem: one 100nF decoupling capacitor was needed for PIC12F629. I tried with 10nF but it still didn't work; I also connected to Vcc pin 4 because I had this pin lifted without connection to anything. Pin 4 is /PAIR mode, but it was not clear to me in documentation which value...

Hias wrote:Your solderwork

In 7 different boards? No, it is not my solderwork Besides, it works in Super Famicom, so definitely, is not my soldering skills' fault.

From looking at a few PCB scans, those capacitors are 10nF and 1nF (black/brown/yellow/x/x is 10nF, black/brown/orange/x/x is 1 nF). Like I said, read the datasheets for your chips. It differs per chip, but most SRAM chips I've seen have at least suggested smoothing caps. As for the RESET line, thi...

Has somebody problems when using SuperCIC in a PAL SNES? I built my own cartridge with my own homemade board with a PIC12F629 and the cartridge works fine on a Super Famicom but it doesn't in a PAL SNES. When playing on my PAL control deck, the console sometimes resets and keeps reset forever. Then ...

I believe the ones on the official boards are 22uF (or maybe 2.2, I don't remember). I would check the datasheets for the chips that you are using and use the size recommended by the datasheet. The electrlytic capacitor in all cartridge boards is 22 uF. But I was talking about those pink capacitors...

As I have told several times in this forum, I'm trying to make my own SNES boards for developing purposes. I recently sent to production a lot of 10 boards and I managed to load my own code on the EPROMs in them. But now I have soldered a PIC12F629 to those boards and the games run perfectly on my S...