nesdev.com

Update on this: The MAX4674's were a winner. The game works perfectly with these multiplexers. I don't think most people use the 74HC T 257s, there might be a reason there why it didn't work right. The HCTs are slightly slower per the spec sheet but not by much. I connected /RD to the MAX4674 /EN i...

Thanks for mentioning that. It's not my database and I'm not sure if jensma is actually still working on it but I can let him know. I just glanced at the first page and noticed that. I revisited the page and saw several more instances, not just 32kB/256kb but also 2kB/16kb mixtures. It would be eas...

Ice Man wrote: ↑

Fri Jan 03, 2020 4:33 am

Something like this?
https://jensma.de/snes/index.php

I just glanced at the database and saw this..... While a 32kilo Byte is the same as a 256kilo Bit, for those that don’t the difference, it could lead to confusion...

Super Mario All Stars has sram detection and it could be that the SRAM in the cart is bad..... Hence, the black screen. SMWAS won't even boot if it doesn't see sram on the cart...

Maybe it's that??

Edit: maybe not after reading more of the posts.... :/

Maybe the load caps for the crystal is the difference? Does it have load caps? They’d be real small, usually in the pico farrad range... probably SMT packages. I don’t really know but would be my first guess from what you described of a before and after symptoms.

The PCB used in the official cartridge is an SHVC-LDH3C-01, which was used by one -- and only one -- title: the one mentioned here. The SPC7110F appears to be a custom graphicsdecompression chip of some sort, tied to a "data ROM" of some kind, and has an additional chip that offers a battery-backed...

Hey Fisher,

I make a SA1 adapter pcb that uses the 5v 27c322 rom. It's clean and easy (no hand wiring). All fits inside the case. PM me for details if you're interested.

Hey all,

I have an AES where someone soldered wires to all the pins of the controller ports (ruining them). No idea why they did this. Does anyone know if this connector is available thru part houses like digikey?

Lastly, I need a power brick for it. I'm looking for one of these too.

Thanks!

We use these roms for years and no problems", etc... which means nothing. They're claiming exactly this! Also, the guy while trying do do a better explanation said this (translated): "The processors of the SNES are made to work at TTL tension levels, like: Low logic level from 0v to 1.8v High logic...

I could figure out the "datasheet" used as reference: 19732210_1223199171140442_4714194938019949955_n.jpg Maybe he's saying that the Snes can accept 3 volt data pulses from the cart but there is NO way he can justify the overvoltage of the rom from the console. I asked for the complete one just to ...

Interestingly the guy claims to have the SNES datasheet, and that it states clearly that all components are totally 3.3v tolerant. I asked him a link to see it by myself!! Edit: As I tought, the guy says it's available on the Internet and that he can't post a link to it on YT. The guy also states t...

I have to admit, I'm curious why the flip flop on the pcb? To Fishers point, the correct way to integrate 3v parts is to level shift the addresslines down to 3v to protect the roms. The CX4, in effect, will upshift the datalines as it exits the CX4. I don't know if the CX4 datalines (on the roms si...

I have to admit, I'm curious why the flip flop on the pcb? To Fishers point, the correct way to integrate 3v parts is to level shift the addresslines down to 3v to protect the roms. The CX4, in effect, will upshift the datalines as it exits the CX4. I don't know if the CX4 datalines (on the roms sid...

Fisher wrote:That's great!
Good job!
By the way, you're using level shifters, right?

Don't see any level shifters...

- a re-port of Street Fighter Alpha 2, employing advanced techniques to fix the music and sound, loading pauses, and cut-down graphics and animation So the game has issues already.... humph, wasn't aware of that. Well, it's more exciting to replicating the chip than decompressing the graphics XD It...