nesdev.org

I`m planning to use both erasable and OTP eproms, 27c256 I already have are UV erasable.....I`m just experimenting now (never flashed an eprom before) and if everything goes ok I will buy some descent flash programmer and make flash cart for SNES too....

thanx for all the info.... I`ll try something but first have to build eprom programmer and see if it`s working....

yes, dr mario is serom (it`s printed on the pcb), the ICs I want to use are identical by number of legs (27c256 or 512), I guess 64/128 KB is quite enough... I`ll have to find original rom pinouts to compare.... but I still wonder if nes will read this sizes because dr mario is about 42KB....

Hi, I`m planning to make eprom based flash cart and I need some help and suggestions from you guys. I want to modify Dr mario (the upper one in the pic) and super mario cartridge. I will make my own eprom programmer,the schematic is very simple but it can only flash 27(c)128,27256 and 27512 eproms. ...

Here`s something little I was building these days. I have two spectrums in my computer junk, one is working and the other one has broken keyboard flat connector which cannot be repaired (that was the common problem those days), so I decided to reanimate the dead one and put Nes-famicom inside it. Th...

Well, the first one I made was exactly like the one you have, so it`s problem with this IC, maybe that top-loading NES didn`t have security pins....

It`s all done. I built it to fit in original nes.... with famicom cart attached size is equal to nes carts so it fits perfectly.... http://img82.imageshack.us/img82/3681/26102008225zl1.jpg http://img360.imageshack.us/img360/6181/26102008226fe9.jpg http://img82.imageshack.us/img82/5887/26102008227mo1...

Finally!!! It was damn ic (and probably resistors). Working good now!!! Thanx drk421 and all other members for helping out, I lost hours trying to figure it out....

Still nothing!!! It`s not working with resistors too.... It`s definitely this CIC circuit. I isolated it with tape on original cart and and Mario is not working now.... So I will add this IC to adapter to see what happens....

Thanx for helping out guys, I did compare my adapter to pics (found on net large pics with both sides), I know there are cheap adapters to buy but I just like making my own stuff.... @sepi: can you tell me what pins exactly (there`s chr Dxx and PRG Dxx) and is it only two pins you mentioned or is it...

No boot, like there`s no cartridge inserted, I even soldered famicom cart directly to NES board (because I got really pissed off) and it didn`t work, so I gave up. The given pinouts are probably incorrect....

According to this: http://nesdev.com/NES_ADAPTER.txt
everything is in order, I even aded 45-46 to 51 exp pin.... don`t have an idea....

I made it with the second cart, I did remove roms (cut off) and connected all pins in order, but still nothing... can`t find the problem....

Well, I do have some pirate cart that have all pins on the board, I just wanted to try to fix this one since it takes a lot of time to solder all wires, but if this can`t work without these pins I`ll make a new one.... here`s the cart.... http://img444.imageshack.us/img444/4702/19102008134ty7.jpg An...

Hello, I`m having some problems. I made the whole thing with super mario cart and cartridge slot from old broken famicom. http://img519.imageshack.us/img519/3779/20102008178cp6.jpg Well, the problem is that mario cart doesn`t have some pins on the board. Pins 37 and 38, 14, 15. So I don`t have M2,Pr...