purchases need approvel to get this writing on the wagon

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purchases need approvel to get this writing on the wagon
by nineTENdo on 2007-08-10 (#26232)
willam programmer
[Please use [url=...] syntax for long URLs -- MOD]
uv epromeraser
[Please use [url=...] syntax for long URLs -- MOD]

chr and pgr rom chips (eeproms-eproms)

eprom
http://www.retrousb.com/index.php?productID=145
or
eeprom chr rom
http://www.retrousb.com/index.php?productID=143
[url]

way less then the power pack and more tedious, plus i have no copynes

what game do you suggest to replace the chips and start writing a simple nametable?

by tokumaru on 2007-08-10 (#26233)
Man, use Flash ROMs instead of EPROMs... Those can be erased in seconds, plus you won't need the UV eraser. The AT29CXXX series works perfectly on NES carts... I have some AT29C040's and that's all I needed so far, because there is no cart supporting more than 512KB of PRG or CHR... They sure are more expensive than EPROM's, but I think they're worth it. They can be rewritten 10000 times or so...

I got the PowerPak too, because using it is faster than reprogramming memory chips... plus you get to try mappers you don't actually have in any other carts (although mappers are emulated and you shouldn't trust them to be 100% accurate).

BTW, you don't need CopyNES to use the PowerPak, just to reprogram it's boot ROM, something that shouldn't happen very often.
new shopping list.
by nineTENdo on 2007-08-11 (#26234)
williem programmer
[Please use [url=...] syntax for long URLs -- MOD]

(2) atmel flash roms (1)chr and (1)prg ROM
http://www.futurlec.com/Memory/AT29C040.shtml

what game would i need for my first nametable with these parts?
Re: new shopping list.
by tokumaru on 2007-08-11 (#26235)
You probably want a few sockets too. Those are cheap. I'm sure you will not want to solder the chips directly to the board, or it will be very hard to reprogram them... =)

Anyway, what you listed there is pretty much what I use.

nineTENdo wrote:
what game would i need for my first nametable with these parts?

I'm not sure I got what you said there... You mean a simple program (coded by you) that uses nametables? If so, any cart should do... but to be safe you should go with the simpler boards, such as NROM, CNROM, UNROM... just search this table for games that use those boards.

Keep in mind that to turn most carts into devcarts you'll need to rerout a few pins to different holes. The only carts that should work just by instaling a socket are the NROM ones, but that's if you are using 28-pin chips, for 32-pin ones you'll need to do some rewiring. In any case you should compare the datasheets of your chips against the pinouts of the Nintendo chips and see what pins should go where.
Nametables
by Lloyd Gordon on 2007-08-11 (#26239)
There are various programs that let you look at the graphics in nametables and see palettes too. Look around for them. Then view some NROM chr files with them (8Kb) to see how they are organized especially the ASCII characters. You can use my files on my very basic site if you want:

http://www3.sympatico.ca/lloyd.gordon3/my_nes_stuff.htm

and build your own nametables when you get some ideas.

by nineTENdo on 2007-08-11 (#26240)
cool thanks guys i owe you you one. ill let yall know how my progress is turning out:)