Search found 76 matches

by natt
Tue Aug 08, 2017 1:55 pm
Forum: NESemdev
Topic: Strike Wolf (MGC-014) (Unl) [!] zapper
Replies: 3
Views: 2471

Re: Strike Wolf (MGC-014) (Unl) [!] zapper

It mostly works in BizHawk (accuracy is a little low but generally correct.) you have to plug the zapper in port 2. WARNING: I don't recommend it though, it started hurting my eyes only after like 1 minute of playing. The flashing is quite a bit worse then in other zapper games. bizhawk。。。。not work...
by natt
Fri Aug 04, 2017 3:44 pm
Forum: NESemdev
Topic: Difficult-to-emulate lightgun game: Top Hunter by Asder
Replies: 14
Views: 5384

Re: Difficult-to-emulate lightgun game: Top Hunter by Asder

All emulators that have lightgun support can run Duck Hunt and Hogan's Alley, but there are some tough-to-emulate light gun games from unlicensed publishers that pose a greater challenge. The most difficult seems to be a game called "Top Hunter", which only exists on the Asder 20-in-1 multicart, al...
by natt
Tue Apr 05, 2016 2:30 pm
Forum: NESemdev
Topic: Super NES controller support in NES emulators
Replies: 2
Views: 3934

Re: Super NES controller support in NES emulators

I have added this controller to BizHawk's NesHawk core, and it passes the test.
by natt
Wed Jul 09, 2014 10:59 am
Forum: NESdev
Topic: VRC6 Test Rom and hot swapping carts
Replies: 3
Views: 2766

VRC6 Test Rom and hot swapping carts

A while back, I added (what is believed to be) fully correct VRC6 support to Bizhawk, including the special PPU mapping modes. I also created a test ROM to verify that my behavior was correct, and asked for people to run the test rom. I had someone run the test rom on an everdrive, which showed that...
by natt
Fri Apr 18, 2014 7:01 am
Forum: NESemdev
Topic: about the APU raw samples and the real playable samples
Replies: 4
Views: 2462

Re: about the APU raw samples and the real playable samples

The downsampling isn't done by picking out individual samples; downsampling algorithms take more than that into account (you might think of it as sort of averaging them all together, but it's more complicated than that). The Nyquist limit is still there though. If the final audio output is at 48khz,...
by natt
Wed Apr 16, 2014 8:07 am
Forum: NESemdev
Topic: Zapruder calibration
Replies: 3
Views: 3833

Zapruder calibration

I recently added zapper emulation to Bizhawk. A few games that I've tried seem to be working, but I want response to be as similar as possible to how it was on real hardware. I tried zapruder, but the docs for it don't seem to give any indication of how hardware should respond.
by natt
Tue Mar 25, 2014 9:36 am
Forum: NESdev
Topic: Should I disable rendering during vblank?
Replies: 9
Views: 8454

Re: Should I disable rendering during vblank?

The horizontal copy might be delayed by a scanline if rendering is disabled at x=257, causing wrong horizontal scrolling on the first scanline of the picture (which is well within NTSC's overscan). But it'll fix itself by the second scanline, and in any case, it overwhelmingly likely won't affect s...
by natt
Sat Mar 22, 2014 5:03 pm
Forum: NES Hardware and Flash Equipment
Topic: CHR /OE vs /CE
Replies: 2
Views: 2174

CHR /OE vs /CE

As far as I know, the standard CHR ROM hookup is: PPU A13 -> CHR ROM /CE PPU /RD -> CHR ROM /OE Or, when a CHR ROM has only one /CE: (PPU A13 + PPU /RD) -> CHR ROM /CE As outlined in this thread: http://www.famicomworld.com/forum/index.php?topic=8671.0, some carts made for clones connect the followi...
by natt
Mon Mar 17, 2014 8:02 pm
Forum: NES Hardware and Flash Equipment
Topic: New NES/Famicom-clone
Replies: 28
Views: 6388

Re: New NES/Famicom-clone

OK, I didn't catch the "low_budget" reference at first.
by natt
Mon Mar 17, 2014 7:51 am
Forum: NES Hardware and Flash Equipment
Topic: New NES/Famicom-clone
Replies: 28
Views: 6388

Re: New NES/Famicom-clone

So is it a FPGA? Or innards from a real NES (or some clone) with an RGB mod hacked on?
by natt
Sat Mar 15, 2014 1:04 pm
Forum: NES Hardware and Flash Equipment
Topic: UNROM 8 IN 1 Multicartridge
Replies: 34
Views: 21814

Re: UNROM 8 IN 1 Multicartridge

Yeah, that's what I needed.

The board is supported in Bizhawk as of r6204.

Here's a UNIF header that should work:
http://www.mediafire.com/download/xt2c9 ... header.unf

Concatenate the exactly 1MiB of PRG rom on the end of that, and it works in Bizhawk.
by natt
Sat Mar 15, 2014 11:59 am
Forum: NES Hardware and Flash Equipment
Topic: UNROM 8 IN 1 Multicartridge
Replies: 34
Views: 21814

Re: UNROM 8 IN 1 Multicartridge

Does the second 74'161 clear on the reset button or just on hard power?
by natt
Sat Mar 15, 2014 10:38 am
Forum: NES Hardware and Flash Equipment
Topic: UNROM 8 IN 1 Multicartridge
Replies: 34
Views: 21814

Re: UNROM 8 IN 1 Multicartridge

FARID wrote: It would be nice if someone can emulate this cartridge.
Taking a look over this, I could easily add it to Bizhawk. It would be UNIF only though.
by natt
Fri Mar 14, 2014 9:14 am
Forum: NES Hardware and Flash Equipment
Topic: Cartridge slot pin out directions
Replies: 18
Views: 8630

Re: Cartridge slot pin out directions

I personally like labeling the cart edge busses as "PPU" and "CPU" instead of "CHR" and "PRG". It's more compatible with how mapper chip pinouts are typically labeled. CHR is really a misnomer here anyway because that bus carries both CHR and NT.
by natt
Mon Mar 10, 2014 10:02 am
Forum: Newbie Help Center
Topic: 128 KB prg rom
Replies: 8
Views: 3821

Re: 128 KB prg rom

There are some 28-pin 128KB mask ROMs in being used as PRG-ROM in original Nintendo carts. 128KB CHR-ROM never comes in 28-pin packages though, for some reason CHR needs more control lines. Third parties did it from time to time: http://bootgod.dyndns.org:7777/profile.php?id=2308 (I can't figure ou...