nesdev.org

Got out my multimeter and working on that. Reburning the roms too for good measure with a full 10 minute erasure and blank test.

I find that hard to believe... See, all it does is scroll a line of text. Seems like it should do something... And yeah, I'm looking into learning ASM for the 6502. Shouldn't be that hard. This is just a test. The roms are inserted correctly. with pin one oriented properly like the original chips. T...

Ok, I installed a ZIF Socket for each rom chip and cut a hole in the cart. When I program my EPROMs however (and they are verifying and all that, I'm using Willem PCB5.0), all I get is a grey screen. Any idea why? I'm socketing the roms directly with no pin modifications, and using the 16kb and 8kb ...

As I thought, it's too late to cancel the EPROM order, so I ordered a simple programmer. Should work fine. I already have the UV Light eraser so it isn't SO bad. I need a programmer anyways.

One note....are you using eproms? Cause you cant program those using copynes (iirc) since they need a special voltage to be programmed. Could someone confirm/deny this? I may either have to cancel an order, or order an EPROM programmer (I think that latter). Any advice either way? What should I be ...

I'm not going to be much help I'm afraid, but I just thought I'd say I was just wondering about the same thing.

So there is no positive chip enable on an 8kb rom? Or is pin 20 on that schematic the positive chip enable?

(I'm pretty sure this is my last question, thanks for your patience)

I think I understand most everything now, but just one thing is still bothering me.

Shouldn't pin 26 be CE thought rather than "not connected"?

On 8kb (64kbit) SRAMs (6264 compatible) pin 26 is positive CE. Since the RAM is 8kb the higher Adress is A12. The shematic you linked is a 16kb (128kbit) EPROM, which does have an A13 at pin 26 instead. You don't want to tie it to VCC unless you want to restrict yourself to 8kb. For NROM carts norm...

Yes. I hope I'm not sounding redundant, but I'm going to clarify one last thing. This sentence in the NROM ram cart guide concerns me: You will now have to solder a small piece of wire on the bottom of the board across pins 26 and 27 of the 8K RAM chip. This will connect +CE to VCC. If you look at t...

My concern was the guide I read seemed to refer to pin 27 as the VCC connector, and the schematic I linked refers to the VCC as pin 28. Also, there seem to be a few other things that just don't sound right to me. If anyone could kindly confirm/deny that the above chip could be made to work, I'd be m...

I found a guide to get a ram cart built, but I want something more permanent, perhaps EPROM based. Would these parts serve fine for that purpose if I just substituted them in in the RAm cart guide, or am I oversimplfing things? Some of thing pins don't seem to match up so I'd like to check first. ht...

Thanks a bundle my friend, just what I needed!

I have an NES with a CopyNES installed I've been using to dump roms, mostly for use in emulators. Recently, I decided it would be fun to get into the development scene and I started programing some simple programs in my emulator using NBASIC. I would like to try running these on a real NES, with som...