Search found 2097 matches

by infiniteneslives
Thu Apr 09, 2020 2:52 pm
Forum: NES Hardware and Flash Equipment
Topic: Adding features to discrete mapper with multipurposed CIC
Replies: 98
Views: 33278

Re: Adding features to discrete mapper with multipurposed CIC

Well before taking next steps, I decided to go ahead and investigate why my current implementation wasn't working on some clones including retronHD & AVS. Couple different things make executing from mainboard SRAM difficult or impossible depending on the system. Just wanted to share my findings & ho...
by infiniteneslives
Wed Apr 01, 2020 6:17 pm
Forum: NES Hardware and Flash Equipment
Topic: Adding features to discrete mapper with multipurposed CIC
Replies: 98
Views: 33278

Re: Adding features to discrete mapper with multipurposed CIC

Realized earlier last month was official 3year anniversary of this thread/idea and thought would be good time to give an update on my recent progress over past couple months. I never forgot about this whole idea, but without adequate motivation it ended up mostly falling off the back burner... My re...
by infiniteneslives
Sat Mar 14, 2020 2:02 pm
Forum: NESdev
Topic: uc65, a Mid-Level Language Compiler READY FOR USE!
Replies: 161
Views: 38705

Re: uc65, a Mid-Level Language Compiler READY FOR USE!

For what it's worth, to my knowledge, I'm the only one who actually used it. And I have no plans to use it in the future, I think it's safe to say the project/language is dead at the moment.
by infiniteneslives
Thu Sep 19, 2019 10:31 am
Forum: SNESdev
Topic: SNES NPN transistor battery circuit necessary?
Replies: 39
Views: 28836

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: 15938

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: 80223

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: 18975

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: 18975

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: 4246

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: 18975

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: 7480

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: 7480

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: 6677

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: 18975

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: 6677

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...