nesdev.com

Either the cart's CIC is damaged, or the pins that connect the CIC to the console are damaged.

The simplest solution is to disable your NES's CIC, which can be either the "cut pin 4" technique, or the "add two wires" technique.

But it's only in a place to protect the battery, and those coin cells have significant internal resistances anyway (at least 7 ohms when new)... Oh, apparently it's a UL requirement: https://www.embedded.com/ul-coin-cell-requirements/ The 1k resistor guarantees that even if the diode fails to a shor...

The 1K has different function than the other two – it's there as some kind of current limiter to cause the RAM to brownout in case it's accessed during power failure ... although I'm not clear how that could help. Maybe it'd make a marginal voltage on /RAMCE read as logic high (i.e. false). But that...

Rainwarrior did that: viewtopic.php?t=11947

Maybe better to refer to those as "50Hz video" and "60Hz video"? or 625-line and 525-line? Because the color encoding isn't actually relevant, disambiguates the weirdness of Brazil's PAL-M, and also doesn't need to explain SECAM.

I ... don't know. Right now you've got a loop that's 347÷14400Hz = 24.1ms long, which isn't a multiple of 1/60Hz, and I don't know how to resolve that. Resampling it isn't sufficient, because resampling things won't change the duration of the loop. You might be able to switch between two instruments...

I think my take-away from helping diagnose poot36's SNES is that unless you have a pool of multiple SNESes with failures, and a hot-air rework station, it's just too hard to fix most failures, so it's not worth it to do more than cursory testing (i.e. vreg, fuse, CIC)

Probably? My source is this post.

When using this method, I think you cannot have a loop length that is longer than 240 samples, unless it's an integer multiple of 240 (or whatever block size you're using). ... and unfortunately, FamiTracker doesn't support multiple different wavetable lengths within the same instrument, so I think ...

Not really related, but I'm surprised at how much better I like that arrangement over the original.

poorstudenthobbyist wrote: ↑

Sun Jan 24, 2021 9:39 pm

I'm wondering why the SNES doesn't have a battery monitor IC on it as well.

The MAD-1 is believed to include one. That doesn't handle the boards that use a 74'139, however.

But since the game is indeed available on pc10, then the interest for this might be very low :| Between there just not being that many Vs. System machines, and needing a brand new daughterboard, I don't think you're going to get much interest anyway. So I'd say this should come down to whether this...

Since tepples reminded me, it might actually be easier to NESRGB an NES and put that in a random arcade cabinet than to port the Punch-Out cartridge to a Vs. System daughterboard. But if you think the idea of making the first new class of daughterboard for the Vs. System sounds fun, don't let me sto...

Could you make a more advanced PPU expansion chip then? Please read these following two quotes closely : There is a mapper in the works called MXM that provides 8x1-pixel attribute areas for backgrounds. It runs on INL's Gowin FPGA-based boards and looks to provide about as much of an improvement o...

You're right, I forgot about the NESRGB.

But from what I've seen, no ones uses Vs. arcade boards in coin-op mode any more; they all seem to just be left in free play. In other words, the point seems to be the cabinet, not the mainboard.