nesdev.org

Its for Turtles 2. It probably doesnt matter now, but here are some game genie codes. I couldnt get the game genie to block writes to 4011 directly (I think it automatically adds 0x8000 to the address), so I used it to alter the data value queried from those addresses. I added a breakpoint in FCEU w...

It probably doesnt matter now, but here are some game genie codes. I couldnt get the game genie to block writes to 4011 directly (I think it automatically adds 0x8000 to the address), so I used it to alter the data value queried from those addresses. I added a breakpoint in FCEU whenever 4011 was wr...

I find Jagasian's point persuasive. A cheap and easy-to-emulate-accurately mapper would be ideal for modern NES development. Someone on 6502.org posted that the SX series microcontrollers can be had for under $3 a piece and run at 75 MHz, allowing them to emulate a programmable logic device plenty ...

I dont have nesasm but I was able to mostly convert it to CA65 and could reproduce the problem. I believe this is because of the ROL call later in the PadLoop From the 6502 simulator docs. ROL shifts all bits left one position. The Carry is put in bit 0, and bit 7 becomes the carry. Looks like you h...

I'm surprised theres any left to be honest.
I missed the NWC batch again.
Oh well, gives me a chance to finish some coding
Al

Sorry, different model than mine. EDIT- But remember you have to change DIP switches AND jumpers. Its easy to forget about the jumpers. For my version of the software, it shows an image of what everything should be set to. Good luck with this. It's very frustrating to have the programmer and not be ...

Which model willem are you using? I have a Dual power one at home. It uses USB for power but can also use an external source. I had loads of problems with some flash chips, but almost no problems with 27C256 EPROMs (and I've done a lot of em) The thing I do mess up ( a lot ) is forgetting to set my ...

Its a marker that I think uses silver instead of ink. Its sort of squeezable too. I might not be using the correct terminology.

This is the brand I used:
http://shop.vetcosurplus.com/catalog/pr ... cts_id=931

It almost never works for me though. Usually I just make a mess.
Al

There is no need to switch them. If you have vertical mirroring, and we call the name tables "A" and "B", let's say you start displaying name table A. As you scroll right, name table B will start to show up, until it fills the whole screen. If you keep scrolling right, the NES w...

Thanks Leon.
I ended up checking the CHR and a connection to one of the CHR pins was bad. One of the traces near a CHR hole was damaged. I couldnt see the damage, but the multi-meter showed I was not getting a connection so I used a conductive pen and resolved it.

Al

I know this is an old topic, but I think I probaby didn't do things correctly when I converted over to using NMIs. All my code works and looks fine, but I might have just gotten lucky. 2 wrongs (or 20) making a right (so to speak). When I converted my code from polling 2002 to using NMIs I got every...

I'm guessing this is a pretty newb-ish question, but while I was making one of my homebrew NROM carts (de-soldering the old chips, switching the mirroring, re-soldering the new EPROMs) when I went to test the cart in my NES, I noticed that the graphics seemed to "bleed" vertically on the s...

I appreciate the information about the pins.
For people wanting to maximize hardware compatablity its good to know.

I wonder (cause I know nothing of eletrical engineering) if this is why Aladin Deck enhancers dont work in the NEX.

Al

I dont share your hate for game collectors. Cause I consider myself to be one.

I consider myself a game collector first, a homebrewer second, and a game player third, based on how much time and effort I put into them.

Homebrewing is where I would like to spend more time though.

Al

I'll definitely want one.

Al