nesdev.org

TmEE wrote:The 2XY040 is a 4Mbit chip not 4MByte. You will need to get 32Mbits/4Mbytes in total, so you'd need 8 of those buggers
I'd locate a 29F032 chip and a TSOP adaptor, much less hassling.

do you think it can be done with 4 8Mb chips instead? or is a 29F032 really the best way?

It could be done with 8 4M chips, but it'll be a bigger mess. Really the Game Doctor copiers or another copier is the way to go if you want to be economical.

MottZilla wrote:It could be done with 8 4M chips, but it'll be a bigger mess. Really the Game Doctor copiers or another copier is the way to go if you want to be economical.

this isn't for economics. i'm interested in making real carts to provide them to a certain group of people at the lowest possible price (parts + a small amount of labor + shipping). none of that 200$ ebay stuff. they still won't be cheap, but they'll be reasonable considering the parts involved. so do you think just doing flash chips is an easier way, and since most people won't open it, it doesn't really matter? in which case, please give me what you think is the best possible way. im trying not to waste a bunch of money on failed attempts.

I'd like to see those 8 'wired' chips fit back into the cartridge, put back together - hahaha

eight 32pin eproms inside snes cart? No problem

My old 6-eprom cart, you can connect additional two eproms to cart (added and marked on picture for example):

Well, you sure like wires. Personally I don't like them much.

Its my old cart, now i dont have any snes carts/games except SO ENG
Now i have GameDoctor SF6, and i make home-made two expansions 2x 64megabit = 128mbit GD RAM (using 60ns SIMM PC rams, 128mbit ram cost me about 2$ and some work time).

Holy crap! Hope those were all flashed/burned correctly before you crammed them into the cart <_<;

Programm EPROM -> VERIFI -> READ programmed EPROM* -> compare readed data with original data using hex editor or total commander* -> now you have 200% assurance

*I always read eprom and compare data twice

Instead of 8 chips, just use 4x 1MB EPROMS. There are tons on ebay or http://www.futurlec.com

@sdm
Which game is that? I haven't seen 6MB before, it probably uses some strange sort of address decoding.

I think your website (http://www.romlab.prv.pl/) has a lot of great info! BUT you seriously need to get rid of all those animated gifs, it literally makes me sick.

It needs to be said that with a custom board layout there's just enough room inside a SNES cart for the ROMs to be socketed.

Existing boards just need way too much effort, as anything bigger then 1MB needs a crapload of rewiring.

Computolio wrote:It needs to be said that with a custom board layout there's just enough room inside a SNES cart for the ROMs to be socketed.

Existing boards just need way too much effort, as anything bigger then 1MB needs a crapload of rewiring.

True, but Eproms on standard DIP-sockets do not fit inside a SNES cart shell, they're too thick.
Also, if one was to design a custom pcb for SNES repros, flash would probably be the way to go nowadays.
You can get these 8mbit Eproms for cheap today, but I don't think you can count on them being still steadily available a couple of years ahead.
They're just ancient technology.

but these tsop to dip adaptors will not fit inside a snes shell very well would they? I'm looking for the easiest route to make some snes carts like the FF games, terranigma NTSC,ect.

From what I've seen those TSOP flash adapters do fit inside the cartridge shell without any changes. Technically you don't even need the little adapter, you could wire the TSOP flash chip by hand to the cartridge ROM socket. But working with and programming TSOP chips isn't that easy. Also definitely more expensive to get your programmer setup to deal with them.

MottZilla wrote:From what I've seen those TSOP flash adapters do fit inside the cartridge shell without any changes. Technically you don't even need the little adapter, you could wire the TSOP flash chip by hand to the cartridge ROM socket. But working with and programming TSOP chips isn't that easy. Also definitely more expensive to get your programmer setup to deal with them.

Do you know much about the needhams EMP20? Is there such an adaptor for the EMP series? I ask as you seem to be a pretty well smart fella.