hi guys
very deeply sorry to bother you guys im sure im like the fifth this week to ask this question
Exept i am not a cheap $ guy haha:P
alright im from canada
i would like to know a site that sales a cheap EEPROM programer + the sockets + the eeproms.
& how to put homebrew , roms , to the chips.
thats mainly that i need a little explain . notion .
I god a excite bike PCB with cart that i opened today .
big thanks! for your response & time in advance!
I bought a Willem burner from Sivava.com because it seemed to be the cheapest. If all you want is to burn memory chips, it's about as cheap as it gets AFAIK. It's pretty easy to use, select your chip and move some switches and the software is pretty self-explanatory from there. If you want more capabilities you can spend a little bit more (myself, I wish I could burn GALs now).
Futurlec.com I think had the AT29C256, a 32kB Flash chip which would be a nice for replacing ROMs on an NROM cart like Excitebike (the only Flash chip with no rewiring needed). Those are $5 each I think. They have cheap sockets too.
If you only need some ROMs burned once, if they're smaller than 64kB I can burn and mail a couple to you for only slightly above what it costs me. Like $6 or so in total.
Hi,
I got my programmer from
http://www.sivava.com/ (the US$45 one), and all my chips from
http://www.futurlec.com/.
I prefer to use Flash ROMs than regular EPROMs, because EPROMs need UV light and some time to be erased, while Flash ROMs can be erased by the programmer in seconds. EEPROMs can be erased also, but Flash is more common.
The Excite Bike cart uses an NROM board, which means that can use for games with up to 32KB of program ROM and 8KB of CHR ROM. The good thing is that many EPROMs, Flash ROMs and EEPROMs are directly compatible with the Nintendo chips of the sizes above, so you don't even need to rewire anything on the board to use the new ROMs. You can just desolder the old ROMs, solder a socket in and place the ROMs you programmed yourself.
Now, iNES ROM files have a 16-byte header at the beginning, followed by the contents of the program ROM, and then the character data (tiles). Since you'll be dealing with NROM for now, you'll be dealing with 24KB (16KB PRG + 8KB CHR) and 40KB (32KB PRG + 8KB CHR) files. You just need to open the ROM file in an hex editor, ignore the first 16 bytes (iNES header), select 16384 or 32768 (depending on the size of the PRG) and save that in a separate file to burn into the PRG chip. Then select the next 8192 bytes and save to another file as the data to burn into the CHR chip.
Then you just use the software that comes with the programmer to copy the contents of those 2 files into your chips.If you happen to use chips larger than the data you put into them, be sure to replicate that data as many times as needed to fill the chip. Just to be safe.
Keep in mind that with an NROM cart, you'll only be able to run other games that use that same board. You need to have a different devcart for each type of game (mapper) you want to run. And as the games bocome bigger (and you need to use bigger chips), the chips stop being compatible with the ones made by Nintendo, and you have to rewire a few pins when installing the sockets so that the chips can be used with the Nintendo boards.
Wow, Futurlec seems to ROCK !!! I've never seen a site where searching for electronics composants is so confortable and with a so wide range of things available at very low price (not including shiping of course).
Plus, they have SRAMs available with dual separate port. Imagine mapping such a SRAM on a cart on both $6000-$7fff on PRG bus, and $2000-$3ffff on CHR bus. You'd be able to effectivly write to CHRRAM during rendering !! Mapping it at $0000-$1fff would effectivly get 4 screen mirroring with the ability to write to all 4 nametables during rendering !! Awesome !
EDIT : Okay, there is only up to 2k available, but that would do for two re-writable name tables (mirrored as usual), or just half a pattern table rewritable during rendering. Still sounds great.
Bregalad wrote:
Plus, they have SRAMs available with dual separate port. Imagine mapping such a SRAM on a cart on both $6000-$7fff on PRG bus, and $2000-$3ffff on CHR bus. You'd be able to effectivly write to CHRRAM during rendering !!
I think there'd be more to it, there's /BUSY signals for both sides. Same problem as usual, can't access the same memory locations from both sides (it's just not as bad with this chip). Plus a 48-pin DIP is huge, and that's only 2kB for $10. Like what's been mentioned in the other dual-port RAM threads, it'd probably be a lot more effective to use a normal SRAM with a custom memory controller.
I have to agree with Memblers and Tokumaru on the Sivava programmer. I have it too, and I love it. Also, flash roms are easy to use and quick to program/erase.
Now, when putting another rom on the board, I use CajoNES (
http://www.zophar.net/utilities/nesutil.html ). It is a DOS program, but it makes it very easy to split the rom into PRG/CHR without the use of a hex editor. I believe F7 is the key to split roms into Pasofami format (PRG, CHR, and PRM). Don't worry about the PRM, but the PRG and CHR files will be ready to go.
Good luck.
NC
I've used Futurlec a few times, you can't beat their prices. Their shipping is cheaper than me taking the bus downtown and picking the parts up myself. I've some spare EPROM's that I would program and sell for cost & S&H if anyone wants.
GREAT thanks for the response!
Bought the EPROM programmer from sivava (very cheap! = loving it! 54$ shipped!!)
+ im gonna buy the chips & socket right now!:)
^_^
I hope it's simple to put sockets & burn games to chip
thats my main worry
especially the burning part.
PS: futurelec only have AT29C256 256k... is that ok?
gosh i would like to order IC28 sockets & 4 x AT29C256 eproms ... but they don'T take paypal payment all my $ is there....
grr damn futurlec
hayabusafmw wrote:
I hope it's simple to put sockets & burn games to chip
thats my main worry
especially the burning part.
Desoldering the original ROMs may be hard sometimes. You get better at it as you keep doing it. Just be patient and you won't ruin the board. Never use much force. I just got a desoldering iron, that is supposed to make this task much easier.
I've been using a regular soldering iron and a solder sucker so far. I hold the board vertically, and heat each pin from the side where the ROM is, and place the solder sucker on the other side of the board, and release it when the solder melts. This works fine, but some holes are harder than others, and you have to be patient.
Soldering the socket in is much easier, especially if you don't need to rewire anything, which is the case with NROM.
Burning is easy. What might be hard is setting up the software and everything for the first time. For some reason, the latest version of the software that came on the CD didn't work, it just couldn't detect the programmer. Just using an older version fixed the problem.
You just need to set a few jumpers on the programmer's board depending on the kind of chip you are "burning" (according to a sheet they send you), and if you always burn the same kind of chip you don't need to worry about that ever again.
On the software, just pick the kind of chip you're burning, select the file from your hard disk (PRG and CHR, that you previously split from the NES file) and tell it to transfer the data to the chip. Really easy and quick.
Quote:
PS: futurelec only have AT29C256 256k... is that ok?
That chip (32 KBytes) can be used without problems on you NROM board. They also have larger Flash ROMs, up to 512KBytes (the AT29C040) which will work fine with boards that support larger ROMs, once you have installed and wired the socket correctly.
I found a way to take of the rest of the pin legs of each eprom
I took a needle (i heat one side of the leg hole & then stick a needle in the hole so it removes the exess of solder & pin leg part remaining)
took me 3 hrs to get the first Chip done
i have holes in the 28 holes.
I have the 2nd one half way done i won't do it all in 1 shot
i need a place to buy , Eproms + sockets beside Futurlec they don'T take paypal do you have a clue where?
thanks!!!!!
hayabusafmw wrote:
I have the 2nd one half way done i won't do it all in 1 shot
Take your time. You're doing fine.
Quote:
i need a place to buy , Eproms + sockets beside Futurlec they don'T take paypal do you have a clue where?
Sivava has the nice W27C512 EEPROM for $2.50 each. Although it is a 64KB chip, it's still pin-compatible with the NROM boards, so no rewiring is necessary (you just might need to replicate the data to fill the whole chip). I have some of these which I bought along with my programmer, and all games I tried with it worked fine.
I know, I should have told you this before you ordered the programmer, but I couldn't imagine you'd have problems with Futurlec. So, if you don't mind paying for shipping again with Sivava, I'm just telling you that this chip will work fine. I haven't tried any of their other chips.
i don't mind paying shipping....
you wil just need to explain to me once i fit eveything & get everything how it works:)
I saw on site that W27C512 EEPROM was a replacement for the other chip that i wanted.
So it's 28 pins aswell.. i will buy sockets too
thanks!!:)
hayabusafmw wrote:
I saw on site that W27C512 EEPROM was a replacement for the other chip that i wanted.
So it's 28 pins aswell.. i will buy sockets too
Yeah, they say it replaces the 27's EPROM chips, that are pin compatible with the NROM board, so you're fine with them! =)
That's why I bought them in the first place too. I wanted some chips along with the programmer (before I decided to get the Flash's from Futurlec), and these were the most promising ones Sivava had. They work just fine, and can be erased and rewritten many times without problems.
It's been a while since I last used those, so I don't remember the exact configuration of the switches and jumpers on the programmer, but I remember it wasn't hard to set up with the documentation and software they sent.
cool
but i found someone to order from futurelec...
so i will used te flash one:P
will buy 4
So here is the PCB i managed to take the chip appart....
Also what did you take to make a hole on the nes cart
I totally destroyed mine....
look at that .
So i will know the the next time.......
it's my first time hehe...
Try a nibbler or dremel to cut the case. Also buy a desolderer from Radio Shack, they only cost about $12.
got a desoldering Iron with integrated pump on it.
worked a little good the holes got bigger & now i can say the sockets will fit:)
I can't wait to have my Chips + programmer:)
so guys , since i used a Excitebike board which game i could put on this cart?
I need to catch this part i recall there was a chart for each game which are familiar & compatible
I can't wait to try those out i will go buy a couple of mario bros Cart &
Other non valuable cart at my local pawn to try more.
& make a better cosmetic cart.
HAPPY NEW YEAR!!
Check
this list, it tells what games use which boards. Your board can only run NROM stuff.
Your board is an NROM-128 though, so it will support games with only 16KB of PRG ROM. I believe you have to wire the highest address line (A14) of the chip to A14 on the cart connector.
This is the pinout of the NES PRG chip (compatible with your Flash ROM):
Code:
---_---
+5V - |01 28| - +5V
PRG A12 - |02 27| - PRG A14
PRG A7 - |03 26| - PRG A13
PRG A6 - |04 25| - PRG A8
PRG A5 - |05 24| - PRG A9
PRG A4 - |06 23| - PRG A11
PRG A3 - |07 22| - PRG /CE
PRG A2 - |08 21| - PRG A10
PRG A1 - |09 20| - GND
PRG A0 - |10 19| - PRG D7
PRG D0 - |11 18| - PRG D6
PRG D1 - |12 17| - PRG D5
PRG D2 - |13 16| - PRG D4
GND - |14 15| - PRG D3
-------
And these are the connector pins:
Code:
+-------+
GND |01 37| CLK 21.47727Mhz (NTSC)
PRG A11 |02 38| M2
PRG A10 |03 39| PRG A12
PRG A9 |04 40| PRG A13
PRG A8 |05 41| PRG A14
PRG A7 |06 42| PRG D7
PRG A6 |07 43| PRG D6
PRG A5 |08 44| PRG D5
PRG A4 |09 45| PRG D4
PRG A3 |10 46| PRG D3
PRG A2 |11 47| PRG D2
PRG A1 |12 48| PRG D1
PRG A0 |13 49| PRG D0
PRG R/W |14 50| PRG /CE (/A15 & /M2)
/IRQ |15 51| EXP 9
EXP 0 |16 52| EXP 8
EXP 1 |17 53| EXP 7
EXP 2 |18 54| EXP 6
EXP 3 |19 55| EXP 5
EXP 4 |20 56| CHR /WR
CHR /RD |21 57| CIRAM /CE
CIRAM A10 |22 58| CHR /A13
CHR A6 |23 59| CHR A7
CHR A5 |24 60| CHR A8
CHR A4 |25 61| CHR A9
CHR A3 |26 62| CHR A11
CHR A2 |27 63| CHR A10
CHR A1 |28 64| CHR A12
CHR A0 |29 65| CHR A13
CHR D0 |30 66| CHR D7
CHR D1 |31 67| CHR D6
CHR D2 |32 68| CHR D5
CHR D3 |33 69| CHR D4
SECURITY |34 70| SECURITY
SECURITY |35 71| SECURITY
+5V |36 72| GND
+-------+
When soldering your socket in, make sure to bend up pin number 27, and solder a wire to it, and solder the other end of the wire to a place that makes contact with pin number 41 on the connector. I don't think these are connected on an NROM-128 board.
This way you will be able to run ALL NROM games, 16KB or 32KB of PRG ROM. I'm saying this before you get frustrated because of the small ammount of games you'd be able to run without this mod.
If you don't feel like going through the trouble of doing what I said above, just get a game with an NROM-256 board, such as SMB1.
I don't care of soldering 1 wire this isn't a problem:)
i just need to know which is ''pin 27''
but when you say bend it is it (on the eprom or the socket like break the leg?)
give me a picture if you have one
thanks!!!!:)
hayabusafmw wrote:
i just need to know which is ''pin 27''
That's why I posted the pinout above! =)
That "drawing" has all the chips numbered and their functions. Pin 27 on the chip is the second one, top to bottom on the right.
The picture of the board you posted shows that the PRG chip is the one on the right, and the small identation found on top of the chips is also located on the right, meaning that the pin that goes into the second hole from right to left on the bottom row is the one you want.
Quote:
but when you say bend it is it (on the eprom or the socket like break the leg?)
Bend the socket, if you bent the chip you'd have a hard time reprogramming it! =)
I'm sorry that I don't have any pics here, but it's really simple. Just bend the pin up, instead of inserting it into the hole like all others. Make sure the pin makes no contact with the board, and solder a wire to it. Then solder it to a place that makes contact with pin 41 on the connector, which, in the picture you posted, is the 5th one from right to left, but on the other side of the board. You can follow the trace that comes out of that pin to look for the best place to solder the wire.
Let me just say that I don't own an NROM-128 board, so I can't tell you I'm 100% sure of what I'm saying here. If I had this board I could quickly check if this mod would work or not, but I don't. So you better wait for someone to back me up on this! =)
Ah, sice you are interested in devcarts,
this place has a lot of info concerning them. Interesting reading material when you're learning. They have lots of pictures, and there's even has a part about programming the chips, with screenshots and all.
thanks for the help!!:)
I know i sound noobish with all my questions
ill get around quick ^_^
Im getting over excited haha
So if i do the wire trick
what does that limit me to?
Does Megaman 1 or 2 will work?
or more game like SMB1 & goonies.. (multi cart games) like those 100 in 1 cart (which excitebike was on)
hayabusafmw wrote:
what does that limit me to?
Uhh... still pretty limited, sorry! =)
You'll be able to run any game on that list that uses an NROM board. did you take a look at the list?
Quote:
Does Megaman 1 or 2 will work?
Nope! As you guessed, NROM games are the simpler/older ones. Once you get the hang of making NROM devcarts, I suggest you make an UNROM devcart. There are many nice UNROM games, including Megaman 1, so you'll be able to run many interesting games. Plus, UNROM is pretty easy to make, it requires little rewiring and since it uses CHR-RAM, you only have to work on the PRG chip, you don't even touch the other one.
What will make you able to run a great deal of games is a TxROM board. With a TKROM board you'll be able to run most MMC3 games, and the MMC3 is one of the most used mappers out there. You'd be able to run Magaman 3 and 5 with it.
When you are comfortable with NROM and feel like facing some rewiring challenge, you can get some larger chips (you should really have bought some 512KB chips already!) and get to work! =)
I recently got myself a TKROM board, and will soon try to make a devcart out of it. Now that I got my desoldering iron it will be much easier! =D
I could try making a MM2 MM1 compatible cart ^_^
sounds challenging love it.
Is it many wires?
Let me know about this thing too
because mainly i like Megaman 1 & 2 & they are games i would of love to test my cart with for starting
This was originally in a PM to Hayabusa, but some others might be able to use this info to help split their ROM's with CajoNES (as I mentioned earlier in this thread):
Here is what you do:
1. Open CajoNES with the files you want to convert in the same folder.
2. Type the name of the file at the prompt, like "mario.nes".
3. You should see another menu with info on the rom.
4. Hit F7 to export "Pasofami PRM/PRG/CHR" (the key might be different on your menu)
5. Hit F9 to "Discard and Quit"
That is it. You should have 3 files now, for example: mario.prm (not needed), mario.prg (for the PRG file on the cart), and mario.chr (for the CHR file on the cart).
Now, depending on the file size, you may have to expand each file to fill the size of your chip (for example, let's say its 32k).
If mario.chr is only 16k, then you would do the following (in DOS / from the Command Prompt):
copy /b mario.chr+mario.chr mario_burn.chr
That command will append binary (/b) files together into a new file. Do it as many times as needed to fill the size of the chip you're burning.
Hope that helps!
NC
Thanks!!
once again
but i noticed let say it's written like (MEGAMAN II (U) (!).nes)
it won't recongnize it you have to rename it to let say megaman2.nes
but i tryed to rip megaman , megaman 2....
but i only get a .PRG & .PRM....
I don't know if it's normal
No CHR means that the Game Pak contains a (usually 8 KiB) RAM chip, and the CHR data is copied from PRG ROM to CHR RAM while the game is running. I seem to remember that at least half of the six Mega Man games for NES have CHR RAM.
I think Megaman 1, 2, 4 and 6 use CHR-RAM, meaning you won't get any CHR files out of them.
As I said before, when turing CHR-RAM carts into devcarts you only need to mess with one of the chips (the PRG one) and never even touch the CHR-RAM chip. That can make the whole devcart making experience less "intense", which is a good thing.
But you should have told us from the start that you desire is to play Megaman 1 or 2... Did you at least buy large Flash ROMs? Such as 256KB or 512KB? If you want to play those games you really should have! =)
Finding the carts to RUM those games shouldn't be hard, but you'd need to face some rewiring challenge!
So, if you really plan to run those games, go buy a few carts with the same boards as the games you like (take a look at that list I posted) and order some 512KB chips. It doesn't matter if a chip is larger than the game you're putting on it, as long as all pins are wired correctly. So, with 512KB chips you can fit pretty much every NES game (using the boards you own, of course).
I bough 4 x AT29C256 from futurlec I beleive they are 256?
They are 256 kibibits or 32 kibibytes.
hayabusafmw wrote:
I bough 4 x AT29C256 from futurlec I beleive they are 256?
The only ones I see in stock are the AT29C256PLCC's. You didn't order those, did you?
NC
hayabusafmw, don't be confused by those numbers. They are all in kilobits. To convert to kilobytes you have to divide them by 8. Meaning that the chips you bought can only hold 32 kilobytes of data, and you can only play with NROM with that ammount of memory.
I hope you didn't get the PLCC ones, as No Carrier said, because those use a different package and are not shaped to fit a NES cart.
If you plan on making UNROM or TxROM devcarts, I suggest you order some AT29C040's while they're in stock. I don't think any NES game (multicarts excluded) ever used more than 512KB for PRG or CHR.
Wow you are right i am getting confused.....too much number , names , haha
it's Much to know.
http://www.futurlec.com/cgi-bin/search/ ... o=AT29C256
this is what i ordered x4.
With IC28 sockets
So for the Wiring that you talked about....
Which should i do ??
the 1 wire technique or multiple? ....
I guess ninja gaiden game is the same boat as (megaman?)
both are MMC1....
so was that the 1 wire trick you wanted me to do?
On your NROM board, check the PRG A14 line. See if it connects to the A14 line on the cart edge. If it doesn't connect, you'll want to wire that up.
this is the Excitebike i got.
I don'T know where the A14 would be...:S. I know the prg is on the right side tho
Well, tokumaru posted the pinouts on the previous page of the thread. It's all right there. The pins on the connector are also numbered, to make things easier. Find PRG-A14 and follow the trace to where it goes.
hayabusafmw wrote:
Which should i do ??
the 1 wire technique or multiple? ....
That's exactly as Memblers said. A14 on the cart edge must be connected to A14 on the chip. You can check that with a multimeter if you have one. If you don't, just buy a cheap one, you must have a way to check contacts if you plan to make devcarts.
Use the pinouts I posted before to see which pin is which. If A14 is not connected to A14 already, you have to do it.
The process to install a socket for larger chips on boards like UNROM, TxROM or SxROM will often require more than just one wire. You'll need to compare the pinouts of your Flash with the pinouts of the Nintendo ROM, and make sure that everything is connected to the right place.
EDIT:
Just make sure these are connected.
I see..
But if i wanna make my cart a MMC1 MMC3 enable one? does it affect i in the same way?
Like play ninja gaiden , megaman 1 2 ,
what modification are involved?
Im just trying to figure it all out
Im confused a little with Nrom, & MMC1 MMC3 , & all the other stuff
i try to put it all together. hehe.
This board is an NROM board. There is no way you'll be able to turn it into another board.
With this board you can only run NROM games. Connecting A14 to A14 like I said above is just so you are able to run
all NROM games, not only the NROM-128 ones.
To run Megaman 1, you have to get some UNROM cart, install the sockets there and rewire as needed. To run Megaman 2 you need to buy a SGROM cart. To run Megaman 3 and 5 you have to get a TLROM cart.
Small modifications like turning a CHR-ROM cart into a CHR-RAM cart are possible (although not always simple), but turning an NROM cart into anything else is pretty much impossible.
If you didn't get it already: These "-ROM" are the names of the boards, and "MMC1", "MMC2", etc are names of mapper chips. Different boards can use the same mapper. All TxROM boards use MMC3, and all SxROM boards use MMC1, for example. Check
this page for info on the different boards and mappers.
Ahh i see
so basicly if i want to Play Megaman 2 i need a megaman 2 (or other cart that used the same...)
but i cannot take any cart to turn it into a ''free rom cart''
I understand more now!:)
So for now I don't mind it's a experience
so for now i will live with NROM games..
how is the modification you talked about possible (about bending the socket leg)
I will finish this cart
then i will try to find a Megaman ''ready cart''
to try an other project
Like i got a bootleg Famicom Super mario 3 i beleive (i got it in double)
i could do a MMC3 cart right?
I don't know about the chips tho ... if mine would be big enough ...
Also i got mario/duck hunt this would be a MMC1 right?...
hayabusafmw wrote:
so basicly if i want to Play Megaman 2 i need a megaman 2 (or other cart that used the same...)
Exactly!
Quote:
but i cannot take any cart to turn it into a ''free rom cart''
Quote:
how is the modification you talked about possible (about bending the socket leg)
We already told you a few times already, my friend!
The bottom line is that the A14 pin on the chip must be connected to A14 on the cart edge! Do it as you fell like.
The safest way would be to bend the pin of the socket up, so that it doesn't touch the board, solder a wire to it and the other end of the wire close to A14 on the cart's edge. But you should check the board first, maybe they are already connected and you don't have to do anything! If they are not, better do the bending thing.
I'll get home tomorrow, and maybe I can get a few pics of a bent pin. But I'm sure there are a few online already...
Quote:
Like i got a bootleg Famicom Super mario 3 i beleive (i got it in double)
i could do a MMC3 cart right?
Probably. But since it's a pirate cart, we can't be sure. It might use a faithful MMC3 clone, but it may also use a different mapper, and the game was hacked to work on it. Also, many pirate carts use glop tops instead of regular chips, so there is no easy way to install sockets on such carts.
Quote:
I don't know about the chips tho ... if mine would be big enough ...
I already told you that those chips you ordered are only good for NROM. Technically, you can make MMC3 carts with small memory chips, but that would be of no use for you since no commercial games were that small.
hayabusafmw wrote:
Also i got mario/duck hunt this would be a MMC1 right?...
I think it uses some weird mapper that no other cart uses. Also, if I'm not mistaken, this cart (even the original one from Nintendo) uses glop tops instead of regular chips, so they're no good for devcarts.
thanks for the help i understand a bit more
I found today in my game collection
Heavy shreddin (snowboard game) = mmc1
this is great i could use this one
but the screws in the back of the game are different i don't have the gamebit
that fits it.
neither my hardware store.
i think i already asked for them a while ago.
I also don't have the gamebits needed to open original NES carts.
Some people say it's possible to modify a regular screwdriver by carving the middle part or something, but I never tried that.
I open my carts by heating the screws with my soldering iron, while forcing the cart open. When the screw is hot enough, it melts the plastic only enough for it to come off. It works great, and doesn't deform tha cart case. I haven't tried to close them again, but I heard it is possible if you use larger screws.
wooohoo!!
I had a Heavy shreddin cart (never play this game .)
it's a mmc1 cart
opened it like you said (minor damage there)
then ulsoldered the eproms
+ made a 10 x i should say 100x better hole in front aswell. ^_^
very proud of that
the next thing is to know how i will close it ... the screw plastic holder broke while in the process....
maybe electrical tape but it makes cheap.
I noticed what you meant there.... the Chr (has more legs like 32)
& the prg (i could use the same chips i had ordered?)
28 pin
let me know which fits in there so i will order 2 at least.
[/list]
why don't you buy the bit to open the carts up? They're less than 3$ on eBay. Like this you won't be killing the covers every time.
I bought it today but i didn't want to ''wait to unsolder ect''
I always try to do the more i can in 1 shot
What is the chips needed for the MMC1 ?
So maybe futurelec can ship it in the same order since it's not shipped out yet.
PS: i just check my order with FUTURLEC
My eprom order was Wrong
I got 32 pin ones......
wich was 4.50$
the 28 pin one are 6.50$
the ones needed at atmel (flash 256k 28 pin dip)
+ i email them saying if it isn't too late i will take 512k aswell.
On the website it didn't mention that my order was shipped yet (thank god)
this is what i ordered i think .......
http://www.futurlec.com/cgi-bin/search/ ... o=AT29C256
I posted it the day i bought them i think...
I am 90% sure it's not the right chip....
+ just looked they are not in stock so.... Great my order must of not been shipped^^
so what i need for the MMC1 is
1 AT29C512 512k 120ns CMOS Flash Memory
& 1 AT29C256 256k 120ns CMOS Flash Memory
& the the Excitebike i will need 2x AT29C256 256k 120ns CMOS Flash Memory
Is it right??
but the AT29C256 256k 120ns CMOS Flash Memory are not in stock.... grr...
hayabusafmw wrote:
this is what i ordered i think .......
http://www.futurlec.com/cgi-bin/search/ ... o=AT29C256I posted it the day i bought them i think...
I am 90% sure it's not the right chip....
Weird.. it says it's 32-pin DIP on there. I can't even find that page you linked to, just this (the correct, apparently out of stock one -
http://www.futurlec.com/Memory/AT29C256pr.shtmlI looked on
http://findchips.com/ and there are a couple obscure suppliers that seem to have them. Never ordered from them before, but something you could try if you want. BTW, you want the one ending in PC (DIP), not JC (PLCC).
Quote:
so what i need for the MMC1 is
1 AT29C512 512k 120ns CMOS Flash Memory
& 1 AT29C256 256k 120ns CMOS Flash Memory
No, those are kilobits. 512kbits = 64kbytes. You want 512kbytes, the 29F040 (or 29C040, same thing). If you order from them BTW, you might want to get the Atmel type. Someone here on the forum ordered the '020 AMD type and got sent some "PMC" brand chips that the Willem programmer won't support.. he sent me a couple and I couldn't get them to burn either. I guess because AMD doesn't make '020 FlashROMs, heh.
I could sell you a couple brand new AM29F040B-120PC chips if you want, for $6 each + shipping. A 512kB chip can replace a 256kB and 128kB chip too, BTW. Just wire the unused pin(s) to GND or VCC if needed.
Quote:
but the AT29C256 256k 120ns CMOS Flash Memory are not in stock.... grr...
Yeah, that sucks. It's apparantly a very hard to find chip. Kinda surprising, considering how nice it is for replacing a 32kB EPROM. EPROM is definitely going out of style.
thanks i pmed you
But maybe eprom like those (28 pins ) are going to desapear?
maybe the demand isn't there anymore thats why only 2 site have them....
thats sucks that they are that hard to find since it's needed for nes carts:S
found some supplier
that sales AT29C256 & AT29C512
but minimum order 50$
free shipping + free sockets.
I will give it a try
they said they have VERY many in stock
& i also saw some other site saying they had like 160 000 atmel in stock...thats like crazy .
today i found an old Game board i had laying here
It had several maybe 8 to 12 28 pins Eproms.... it fits in the nes pcb
I just wanna check if they can be UV erasable if so i will buy a darng uv eraser so i won't have any more trouble finding chips
it's written on the eprom
S 27c256 -20 fa
& some other i took from the same board is written underneath it
JL2764hs/048002 singapore 17
Let me know ^^
If you want UV erasable EPROM's I might be able to send you some.
hayabusafmw wrote:
today i found an old Game board i had laying here
It had several maybe 8 to 12 28 pins Eproms.... it fits in the nes pcb
what game board? is it dumped? what was it?
be sure you back up whatever it was if it was anything valuable.
Lord Nightmare
I bought the UV erasable chip today from a contact near where i live
^_^
he has all UV eprom for cheap
About the PCB
Nah i didn't dump it didn't need i don't care about it it was a dead board but the eproms are still good im pretty sure.
I just dunno if they would be Compatible
ill know once i get my eprom eraser..
Now i need to learn how to split the game files manually
Im still trying to Figure out how to Rip the games properly using Cajo nes.....
I didn't do fine with ''megaman 2 , megaman 1 ,''
all i was able to do is with ninja gaiden ,
I don'T know what i am doing wrong
even contra doesn't work ..
(i will receive my chips + burner this week i beleive so i need to get those file s ready & learn)
The other day I was in a rush, so I didn't have the time to get any tools or set them up, so I got the PRG from an UNROM (would work for any games using CHR-RAM, as is the case with the ones you mentioned) using DOS "EDIT".
It works, and for games that only have PRG ROM it's really easy. Just go to the command prompt and type "EDIT /80" to enter edit in binary mode. Open your ROM and make sure the cursor is over the first character of the first row (will only work if the beginning of the first row says "NES"). Now, hit "Delete" on your keyboard 16 times, to get rid of the iNES header.
What remains should be the PRG data. Save it now woth another name, such as "prg.bin", and check if the new file has the correct size. A 128KB game should have 131072 bytes, a 256KB game should have 262144 bytes - EXACTLY!