Search found 2094 matches

by infiniteneslives
Thu Sep 19, 2019 10:31 am
Forum: SNESdev
Topic: SNES NPN transistor battery circuit necessary?
Replies: 38
Views: 21103

Re: SNES NPN transistor battery circuit necessary?

ISSI, Cypress, and Alliance all have and assortment of 256Kbit low power SRAMs available for close to $1each. Something like IS62C256AL for example. If you upgrade to the 1Mbit versions you also gain a CE pin which you can simply connect to /RESET (IS62C1024AL for example). Honestly, so long as the ...
by infiniteneslives
Mon Dec 10, 2018 1:04 pm
Forum: NES Hardware and Flash Equipment
Topic: RAM watching on a real NES?
Replies: 33
Views: 14134

Re: RAM watching on a real NES?

Another idea would be to use the expansion port, but unfortunately it doesn't have the necessary signals. It has the data bus, but only A15 of the address bus. So you'd need a GameGenie-like device to pass more information via the EXP pins, but that kind of defeats the point of using the expansion ...
by infiniteneslives
Wed Oct 24, 2018 10:17 pm
Forum: 2017 NESdev Competition
Topic: Action 53 volume 4
Replies: 72
Views: 69633

Re: Action 53 volume 4

Thanks for keeping up on this! I take it we're safe to assume that the rom will be 1MByte at this point.? Looks like it's ~90% full just glancing at the rom binary. So I'll go ahead and have a batch of boards baked off so they'll be ready once the rom is finalized. I don't mean to put pressure on th...
by infiniteneslives
Tue Oct 23, 2018 12:22 pm
Forum: General Stuff
Topic: Portland Retro Game Expo
Replies: 20
Views: 12845

Re: Portland Retro Game Expo

Awesome music. What is the track?
I borrowed the audio, tileset, and much of the project structure from NES-starter-kit, the audio is by Wolfgang.
by infiniteneslives
Tue Oct 23, 2018 11:43 am
Forum: General Stuff
Topic: Portland Retro Game Expo
Replies: 20
Views: 12845

Re: Portland Retro Game Expo

Portland was a great time, fun to meet people for the first time and showcase some of the work being done by so many people in the community. We're looking forward to making the trip more regularly in the future. I was pretty happy with how the panels went. Was surprised to learn the majority of peo...
by infiniteneslives
Tue Oct 23, 2018 11:16 am
Forum: General Stuff
Topic: Mega SG: Kevtris returns with its own take on the Sega Gene
Replies: 5
Views: 3557

Re: Mega SG: Kevtris returns with its own take on the Sega G

Does anybody know why the NES one costs so much? The newer models are made of plastic. The real question is why they don't release it with a plastic case and start selling them again. They claimed to be too busy to focus on re-releasing the NES version while they were releasing the SNES. But they h...
by infiniteneslives
Fri Oct 12, 2018 8:40 pm
Forum: General Stuff
Topic: Portland Retro Game Expo
Replies: 20
Views: 12845

Re: Portland Retro Game Expo

My small booth will be in the back corner #508 (see pic), looking forward to meeting everyone from the community that's attending! Both of my talks are the first talks of the day in Auditorium B: 10:30am Sat, 11am Sun. I'm not bringing much for product, just want to have a booth as a home base and s...
by infiniteneslives
Fri Oct 12, 2018 12:40 pm
Forum: General Stuff
Topic: Working around a damaged (solder) pad
Replies: 15
Views: 6340

Re: Working around a damaged (solder) pad

One person said something that resonated with me: that basically the problem stems from lead-free solder. Yeah it does sound like that especially with the problems you had with new solder not mixing.. That combined with the bend leads is what sounds like created the ultimate hell. Based on your sto...
by infiniteneslives
Thu Oct 11, 2018 5:10 pm
Forum: General Stuff
Topic: Working around a damaged (solder) pad
Replies: 15
Views: 6340

Re: Working around a damaged (solder) pad

Just curious if you tried the method where you fill the hole with fresh solder, stick a plunger solder sucker to the back side, heat with iron from the front side (just heat the pad, don't block the hole), then click the plunger. If the joint is fully heated, and sucker is well seated it's quite a s...
by infiniteneslives
Thu Oct 11, 2018 4:18 pm
Forum: SNESdev
Topic: 16 bit to 8 bit multiplexers options (other than 74xx257)
Replies: 10
Views: 5713

Re: 16 bit to 8 bit multiplexers options (other than 74xx257

Yeah I was specifically talking CPLDs which could be used for level shifting (3v powered, 5v tolerant). But the 5v powered atmel would be a viable solution for the original question focused on MUXes.
by infiniteneslives
Thu Oct 11, 2018 2:31 pm
Forum: General Stuff
Topic: Portland Retro Game Expo
Replies: 20
Views: 12845

Re: Portland Retro Game Expo

Yeah I'm giving those NES homebrew development talks. The first session will cover the CPU architecture and put up some C code for a simple game demo. I'll be using a simplified version of the NES starter kit . I'm hoping this will be somewhat understandable by non-programmers. The second session wi...
by infiniteneslives
Thu Oct 11, 2018 2:11 pm
Forum: SNESdev
Topic: 16 bit to 8 bit multiplexers options (other than 74xx257)
Replies: 10
Views: 5713

Re: 16 bit to 8 bit multiplexers options (other than 74xx257

Any suggestion on cpld models or family to start digging into datasheet? Lattice 4000v family is one of the few (only?) 3v powered, 5v tolerant devices still recommended for new designs on the market. There are other options if you don't mind designing for discontinued/EOL devices, have fun scroung...
by infiniteneslives
Thu Oct 11, 2018 11:23 am
Forum: SNESdev
Topic: 16 bit to 8 bit multiplexers options (other than 74xx257)
Replies: 10
Views: 5713

Re: 16 bit to 8 bit multiplexers options (other than 74xx257

Sorry for the advocation of the devil here.. But I’m genuinely curious. If you’re already working with small SMD devices, and using ~$0.50-$1 of logic to support an ~$1 EPROM; why not just spend that logic budget on comparably priced level shifters, and get the many benefits of 3v flash? It sounds l...
by infiniteneslives
Sun Oct 07, 2018 1:14 pm
Forum: NES Hardware and Flash Equipment
Topic: Kazzo USB rom dumper / dev cart programmer
Replies: 663
Views: 293061

Re: Kazzo USB rom dumper / dev cart programmer

I checked the supported mapper list on gitlab for the new Kazzo device and it seems to support fewer mappers than I recall the older one did. Can any of the old scripts be brought over for use with the new device, or would they have to be re-written? That is correct. The original kazzo is AVR based...
by infiniteneslives
Sun Oct 07, 2018 12:41 pm
Forum: NESdev
Topic: Problem converting 256 KB MMC-1 to 512 KB MMC-1
Replies: 55
Views: 12217

Re: Problem converting 256 KB MMC-1 to 512 KB MMC-1

Sorry for the late circle back, but I wanted to I wanted to share the data point since it was being asked earlier. The Japanese version of Destiny of an Emperor 2 uses CHR-RAM banking (at least the translation does) but I'm not sure if it's for animation purposes. At one point I played the game with...