Search found 739 matches

by Sour
Sun Nov 24, 2019 6:28 pm
Forum: NESemdev
Topic: Study Box (iNES 186) Audio Tape Recording
Replies: 11
Views: 3395

Re: Study Box (iNES 186) Audio Tape Recording

After working on this some more, it looks like the post-gap data eventually contains a "lead-in" portion like the one found at the start of a full-fledged "page"/"chapter". e.g it contains a long string of 0s followed by a single 1, after which the actual data begins. With this in mind, I was able t...
by Sour
Sun Nov 24, 2019 7:57 am
Forum: NESemdev
Topic: Study Box (iNES 186) Audio Tape Recording
Replies: 11
Views: 3395

Re: Study Box (iNES 186) Audio Tape Recording

Ah, sorry, I should have been clearer. There are obvious separators for the chapter data - these usually last about 3 seconds, and I've been using them to split the data into multiple files. In contrast, these "gaps" in the data only last about 100ms and seem to come abruptly in the middle of a byte...
by Sour
Sat Nov 23, 2019 8:52 am
Forum: NESemdev
Topic: Study Box (iNES 186) Audio Tape Recording
Replies: 11
Views: 3395

Re: Study Box (iNES 186) Audio Tape Recording

3 year bump. Thanks to the reverse engineering efforts of abridgewater & Zorchenhimer over on Discord (abridgewater's original notes are here ), I've managed to build a (far-from-perfect) decoder for the Study Box's data track. The data is encoded using MFM, and I've been able to emulate the mapper/...
by Sour
Tue Nov 19, 2019 8:48 pm
Forum: NESemdev
Topic: Need help with mmc5.cpp source, for custom modification
Replies: 39
Views: 5116

Re: Need help with mmc5.cpp source, for custom modification

infidelity wrote:I heard Mesen was incredibly accurate to a real NES. But other than that that's all I've ever known of it.
In case you want to take a look, the documentation for Mesen's debug tools are mostly up to date and should give you a decent idea what it looks like.
by Sour
Mon Nov 18, 2019 8:48 pm
Forum: SNESdev
Topic: Target width for widescreen patches?
Replies: 37
Views: 9548

Re: Target width for widescreen patches?

I don't know where bsnes adds its extra scanlines, but in my original testing I did find Metroid to be one of the games that tends to freeze rather quickly if you put the scanlines before the NMI. After NMI, it handled up to ~400 extra scanlines, which should be enough to take care of most slowdowns...
by Sour
Thu Nov 14, 2019 3:11 pm
Forum: NESemdev
Topic: 2nd2006_next_level test rom and extensions
Replies: 55
Views: 37153

Re: 2nd2006_next_level test rom and extensions

It took a whole year, but Mesen now has options to emulate the $2006 scroll glitch, as well as the $2000/$2005/$2006 first-write glitches + options to randomize the CPU/PPU alignment at power on/reset. For the most part, behavior matches what was seen in the test roms posted in this thread. (all the...
by Sour
Thu Oct 31, 2019 6:29 am
Forum: SNESdev
Topic: Mesen-S - SNES Emulator
Replies: 270
Views: 99641

Re: Mesen-S - SNES Emulator

If you were editing the ROM, that's probably part of the problem then. The debugger currently keeps track of the 8-bit code/16-bit code/data sections and saves them in a "cdl" file, but if you change the ROM, the CDL will no longer match and the debugger will get confused. There's an option to reset...
by Sour
Sat Oct 26, 2019 6:14 pm
Forum: SNESdev
Topic: Mesen-S - SNES Emulator
Replies: 270
Views: 99641

Re: Mesen-S - SNES Emulator

Just released version 0.3.0 This release fills in most of the gaps in functionality compared to mesen (overclocking, netplay, cheats, etc.) and adds support for most of the enhancement chips (all except 2) It should also run a bit faster than 0.2.0 did (~10% faster or so, as far as I can tell), and ...
by Sour
Sat Oct 26, 2019 6:01 pm
Forum: SNESdev
Topic: blargg's SPC test ROMs
Replies: 34
Views: 17735

Re: blargg's SPC test ROMs

Well, hopefully Sour has some ideas because I sure don't. I haven't had the chance to look into this just yet. Was mostly busy trying to finish up the features I wanted to add before releasing 0.3.0 the past couple of weeks (just released 0.3.0 an hour ago or so.) With most of the basic emulation f...
by Sour
Fri Oct 25, 2019 7:02 pm
Forum: NESemdev
Topic: scanline.nes Test Rom
Replies: 6
Views: 1956

Re: scanline.nes Test Rom

FCEUX is not overly accurate as far as these sorts of things go. Especially if you're using the "old ppu" (which is the default), in which case it renders the screen 1 scanline at a time, I think. I think the new ppu is 8 pixels at a time. I'm not familiar with OpenEmu, but it seems to include both ...
by Sour
Fri Oct 25, 2019 6:33 pm
Forum: NESemdev
Topic: scanline.nes Test Rom
Replies: 6
Views: 1956

Re: scanline.nes Test Rom

There's some info/discussion and captures from a Famicom AV for that particular test here: http://forums.nesdev.com/viewtopic.php?f=3&t=14833 Basically, it looks like you might not have to worry too much about it, since the video also has a similar glitch there. Also see Quietust's reply in that thr...
by Sour
Thu Oct 24, 2019 7:00 am
Forum: nesdevWiki
Topic: Spam edits
Replies: 21
Views: 7681

Re: Spam edits

Hadn't checked the wiki in a while, but looking at the recent changes, I would definitely agree it should just be locked down to registered users only. I don't think I've ever stumbled on an anonymous edit that wasn't spam (I'm sure there are a couple, but in that case there are a couple hundred (th...
by Sour
Fri Oct 18, 2019 5:25 pm
Forum: SNESdev
Topic: Mesen-S - SNES Emulator
Replies: 270
Views: 99641

Re: Mesen-S - SNES Emulator

paulb_nl wrote:I have noticed some weird behavior with the event viewer.
Thanks, this should be fixed.
Also finally enabled the event viewer feature to display marked breakpoints as dots on the event viewer.
by Sour
Wed Oct 16, 2019 7:29 pm
Forum: SNESdev
Topic: Mesen-S - SNES Emulator
Replies: 270
Views: 99641

Re: Mesen-S - SNES Emulator

One another note, should I be using the Development Build version instead of the 2.0 release? Super late reply, but yes, feel free to use the dev builds, they are usually pretty stable (and often fix a lot of things over the previous release.) I'll to reproduce the buggy disassembly scenarios. Like...
by Sour
Wed Sep 04, 2019 6:05 am
Forum: NESemdev
Topic: Mesen - NES Emulator
Replies: 777
Views: 303288

Re: Mesen - NES Emulator

No, I'm just lost in "taking a break" land at the moment - sorry for disappearing without notice for a few weeks. I know there are some pull requests that have been done and are pending, will try to check & merge them over the weekend. Still planning to take a break for a while longer, though - I wa...