Search found 535 matches
- Tue Dec 29, 2020 10:06 am
- Forum: Other Retro Dev
- Topic: How does the Genesis handle resets, compared to Nintendo consoles?
- Replies: 25
- Views: 3258
Re: How does the Genesis handle resets, compared to Nintendo consoles?
Looking at the disassembly here , it looks like you could carefully capture the microseconds that it reads the "SEGA" from the header, and assert /VRES at that moment to bypass TMSS. Following up on this: I quickly tried something that would tap /VRES low for the requisite 10 cycles (per the 68k da...
- Fri Oct 30, 2020 10:47 am
- Forum: Reproduction
- Topic: Snes reproduction pcb DIY
- Replies: 0
- Views: 3575
Snes reproduction pcb DIY
www.Mortoffgames.com is selling my DIY snes pcb. Usually the progression of pcb makers is to go from simple to complex. My experience was just the opposite. I made/make the RetroCircuits pcb's and the "simple save" series has all smt parts machine mounted which is complex (and expensive), and is rea...
- Tue Oct 20, 2020 8:22 am
- Forum: Reproduction
- Topic: Sharing my project: A Sega Genesis Cartridge PCB with FeRAM support
- Replies: 4
- Views: 2197
Re: Sharing my project: A Sega Genesis Cartridge PCB with FeRAM support
I don't know how the extra signals on the Genesis cart bus compare to the signals straight out of the 68k itself, but in a bare 68k, the address bus is marked as stable by the /AS signal being low. I assume that the bus arbiter doesn't assert any of the relevant signals (B16, B17, B21, B26) unless ...
- Mon Oct 19, 2020 6:31 pm
- Forum: Reproduction
- Topic: Sharing my project: A Sega Genesis Cartridge PCB with FeRAM support
- Replies: 4
- Views: 2197
Re: Sharing my project: A Sega Genesis Cartridge PCB with FeRAM support
Hello, Its been some time since i've wanted to do this, but was unsure if posting Sega stuff in NesDev would be acceptable. I've talked to B00daW about it and he said that it would not be a problem. This is already posted in Racketboy and i though that it would be fair to share here as much of the ...
- Mon Sep 07, 2020 7:27 pm
- Forum: NES Hardware and Flash Equipment
- Topic: Can't Get Battery Saved SNES Games To Work Or Save With Muramasa PCB Boards
- Replies: 7
- Views: 3417
Re: Can't Get Battery Saved SNES Games To Work Or Save With Muramasa PCB Boards
It appears that your sram is actually an 8k ram and your jumpers are set for 32k. Maybe that’s the issue??
- Tue Aug 25, 2020 10:18 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
I really believe your issues are all related to cross talk. I think if you isolate and ground plane those traces, you should be good. I think the LS series chips help with noise, it’s been a looong time since I researched those so I could be wrong, but I think the SCHOTTKY process helps with noise. ...
- Tue Aug 25, 2020 8:46 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
Sorry about that. It does suck, I know. Prototypes are essential before any large order.
If you want, PM me and maybe you could send me a sample to tinker with. I’ve used the 10F322’s exclusively now for a few years. After that one hiccup I mentioned earlier, it’s been golden.
If you want, PM me and maybe you could send me a sample to tinker with. I’ve used the 10F322’s exclusively now for a few years. After that one hiccup I mentioned earlier, it’s been golden.
- Tue Aug 25, 2020 1:38 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
Iirc, there are about 8 snes OEM variants....
I sold all my unique consoles to HD Retrovision when he was testing his HD cable sets years ago.
I sold all my unique consoles to HD Retrovision when he was testing his HD cable sets years ago.
- Mon Aug 24, 2020 9:42 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
You know I was just starting to feel confident that my designs were nearing a final revision and that I wouldn't have to touch them again. I guess it'll never end... That never ends.... lol. I’m rapidly approaching the end of the alphabet for revisions on a few designs... Keep the CIC traces far aw...
- Mon Aug 24, 2020 8:52 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
I had a similar issue years ago where a pcb I made worked perfectly on most consoles but there were a few consoles that it crashed on (CIC related both 10F322 and 629). I had managed to acquire most of the snes consoles revisions to test on. There were definitely consoles that were more forgiving th...
- Mon Aug 24, 2020 6:08 pm
- Forum: SNESdev
- Topic: SuperCIC for PIC10F322
- Replies: 34
- Views: 15336
Re: SuperCIC for PIC10F322
What happens if you power cycle or reset a few times? When it detects a “wrong” region, it will switch over and you must power cycle or reset the console. Or if the pairing with the console goes awry, it’ll switch regions. Usually a reset twice will switch it back to whatever the consoles region is....
- Sat Aug 08, 2020 8:26 pm
- Forum: SNESdev
- Topic: Good free snes cart design
- Replies: 4
- Views: 4430
Re: Good free snes cart design
Muramasa Entertainment sells universal SFC/SNES shells as well as the American square ones. There are also various PCBs with support for Lo-ROM, Hi-ROM and battery-backed SRAM. I haven't tried them yet myself, so I can't say if they are any good or not. They also have Famicom and NES PCBs with shel...
- Wed Jul 29, 2020 6:00 am
- Forum: SNESdev
- Topic: SNES SRAM Test ROM
- Replies: 9
- Views: 3612
Re: SNES SRAM Test ROM
Here's what I want to do with it: I offer PCBs with parts pre-mounted, and I recently found some surface mount SRAM to try out. My plan is to be able to produce carts with everything already on the board, except the EPROM. I designed a programming board with a SNES cart connector on it so I can plu...
- Tue Jul 28, 2020 8:28 pm
- Forum: SNESdev
- Topic: SNES SRAM Test ROM
- Replies: 9
- Views: 3612
Re: SNES SRAM Test ROM
I guess what makes the most sense is to have some external device run a cart integrity test before something is actually mounted on the cart.
- Tue Jul 28, 2020 7:42 pm
- Forum: SNESdev
- Topic: SNES SRAM Test ROM
- Replies: 9
- Views: 3612
Re: SNES SRAM Test ROM
Huh? To what end? You’re asking for a program that would test the pcb that it’s installed into? Testing itself? Not sure I follow what you are asking about.