nesdev.org

ROM A1-A0 = 74HC161 inputs (using address instead of data avoids bus conflicts) 74HC161 reset = CPU /RESET 74HC161 load and clock = CPU /ROMSEL and /WR (or vice versa?) I think that won't work, because in LoROM mode, /ROMSEL = '0' and /WR = '0' when accessing SRAM to save a game, so this would corr...

There's pretty much only the official documentation (book2, not sure how people feel about linking that stuff here) and this patent . I made some test projects a while back along with a superfx assembler for ca65: https://github.com/ARM9/casfx Might help you get started. Why doesn't the SuperFX's p...

Really nice! It could be a good start to calculate how many flat polygons can draw the SNES per second!

100Ω as a current limiter in combination with misusing the overvoltage protection diodes intrinsic to a 3V part is definitely abusing the SNES's address bus drivers. Not only the SNES, but the 29L3211 input buffers :? I forgot a 'k': they're 100KOhm resistors in order to apply 20uA max to each 29L3...

A valid approach to the problem, which I myself implemented on a homemade board, is to use 100KOhm resistors in A-1 to A20 going into 29L3211 (22 address lines in byte mode), so you shift 5V (even less since voltage losses in the cartridge edge) to 3V. There aren't timing issues since 29L3211 is asy...

Okay, I'm finished with the snes initiation code. Thanks for your effort. I have just taken a look at it and I would have initialized $2100 with zero brightness, since you probably will show your first image on screen coming from a fade-out (black to the image). Somebody know if there have ever bee...

Danin wrote:Updated with my new firmware rewrite. Nearly double speed writes on SNES, NES as yet nonfunctional but in progress.

Great job!! Looking forward to checking it!

And the multi-game aspect. And it's for the guy who wants to do a repo but doesn't have the skills other than soldering. Also, can your EPROMs go in sockets and cart shell still close? Ah, ok, both are good points XD My board is not multi-game, although I designed a different one that supports that...

Those boards look like a bit complex, don't they? I guess they took a hard time to desing, but... what are their purpose? Just to use 27C322 in a donor cart to make your own repro? If so, there are some other solutions cheaper and more "powerful" since you don't need donors. I made these b...

Let me know how that goes. Given your test grouping, I think you might be correct that it's not the CIC, which leaves odd issues and board spacing in the programmer as suspect. Or simply an issue with the board itself not properly programming. If that's the case, let me know and I'll see if there's...

So mainly you're having issues with the programming software? It can be a bit challenging to use. I don't know if the problem is the board or the programming software. I guess it's the board, but can't be 100% sure. In fact, I was playing Romancing Saga 3 on that very board almost everyday the past...

I'm really discouraged about INL boards... and I'll explain why: They didn't work on ANY of my 5 PAL SNES, but InfiniteNesLives explained all about this issue, so I decided to use them on my japanese Super Famicom. First time I programmed the board, it didn't work, but after 3 or 4 attempts, it did....

Communication: I didn't talk with InfiniteNesLives much during this transaction, but on my first one he generally got back to me in a matter of hours. A+. I wish I could say the same. I bought some boards more than a month ago and they didn't run on PAL SNES. I wrote some emails to InfiniteNESLives...

is that 32mbit cart unfinished? You seem to be missing your '257s. Not, not missing them. When mounting a 16Mbit game, you can avoid mounting both multiplexers if you re-arrange the data in the EPROM so the data outputs from D0 to D7 only. The data is shifted and A20 becomes A0, thus the floating w...

benjaminsantiago wrote:Hey magno, do you have any pictures of the carts you've made anywhere? Just curious

Yes

HiROM (64 Megs):



LoROM (32 Megs):