nesdev.org

Okay, I've got something that makes me want to confirm something...

I read over this list and it doesn't say anything about chips that are MMC chips, just NROM, SNROM, UNROM, etc. Both my games, according to the list, are MMC3 which I suspect is supposed to be Mapper 4? I guess because it goes by hexidecimal on MMC numbers? Bah, I'm retarded.

Also, when replacing the chips, do I replace the CHR AND the PRG chip with one chip that contains the ROM data? Or do I not even TOUCH the CHR chip? I wonder this because the ROM is supposed to be both graphic data AND programming data, but according to what I understand, graphics are stored on the CHR chip, and PRG has the programs and functions... So yeah, how do I implement one ROM holding both graphics and programming onto two chips that play as one or the other?

Look at the wiki here. You'll find that MMC3 is usually of type TxROM:

http://wiki.nesdev.com/w/index.php/MMC3
http://wiki.nesdev.com/w/index.php/TxROM

You'll need to replace both chips from your board with equivalent size EPROMS, and probably do a small bit of rewiring if you need to replace a DIP-28 chip (28 pins) with a DIP32 chip (32 pins). This is likely the case on the PRG chip.

You should check out this site to find the rom size of the board in question, and order both chips:

If I recall, this is the cart you are trying to remake:

http://bootgod.dyndns.org:7777/profile.php?id=3553

It's a "TKROM" and has a 256KB PRG and 128KB CHR. You'll need a to get eproms in those configurations. Try to find a donor board with DIP32 sockets so rewiring won't be neccesary, otherwise DIP28 will do but you'll need to rewire some stuff.

Also, use that site I just linked if you have any curiosities about games whatsoever, you can find equal donor carts by searching by board type with the "TKROM" as the query.

Here's a donor cart that'll do. Good luck finding it though, not sure how common it is:

http://bootgod.dyndns.org:7777/profile.php?id=186

Hope this helps.

Good news everyone,

http://i50.tinypic.com/2yy5oqt.jpg

I've gotten my EPROM burner and Screwdriver that works on NES carts and I've opened the cartridge, now I just need to know a little more stuff. First, sorry about blurriness on my photo above, it's my exact cartridge. This is the donor cart, however my cartridge, unlike their shown board, has the chip above the CHR (I don't remember what it is) is by SHARP and it all says on the chip:

LH5160- 10L
SHARP JAPAN
9012 3DA

The board is NES-TKROM-01, the PRG chip is 28-Pins while CHR is 32-Pins. Will this mean that I can avoid rewiring the CHR chip? I'm pretty sure though I will certainly have to rewire the PRG chip.

Also, one last thing, the usable EPROMs for this are 27C001, 27C020, and 27C256... Right? Just want to make sure.

This is the Donor cart

This is the Final Game (Japan)

LH5160-10L is Sharp's part number for an 8 KiB SRAM, analogous to the better-known JEDEC #6264.

Glitchy Furrystuff wrote:the PRG chip is 28-Pins while CHR is 32-Pins. Will this mean that I can avoid rewiring the CHR chip?

No, you need to rewire both. The only original chips that are directly compatible with EPROMs are the smaller ones (32KB or less).