Since the new release, some FDS games are unable to properly switch over to another side.
Tested it out using the following games:

Adeian no Tsue
Kaettekita Mario Bros
Gall Force
Yume Koujou Doki Doki Panic

Pressing the FDS button when prompted to, gives the Err 07 message. Same goes for when the disk change is set to automatic.

For reference, NES 2019/05/10 was able to load the first two with no problem. Was there a recent change to the FDS disk switching?

Hey there,

So I have my MiSTer hooked via HDMI on my Samsung 4K/UHD TV (UN55KU6290). Most of the time, this core will not show me any picture when loading any game, I'll only see the MiSTer interface when I hit the menu button. I'll hear a game play with the sound going through the HDMI, but no picture. It will however display via VGA on an old monitor that I've hooked via the IO board.

So ya, I get a blank image on my TV while the sound passes through but I do get the picture on my monitor. Sometime, after playing around with a bunch of different cores that work every time (SNES, Genesis, PC-Engine), it will eventually display on my TV , but that's on rare occasion.

I get a similar with the Master System core and more often with the GameBoy core. Any idea of what's going on and how to fix it?

Thank you

This happens with both the Japanese version titled Dynamite Batman, and the US Batman: Return of the Joker. The title screen is fine, but when you start a new game, after the "Stage 1-1" screen, the game will freeze.

Appears to use mapper 69 like Gimmick, but the FME-7 variant with no expansion sound.

http://bootgod.dyndns.org:7777/profile.php?id=657

Is this a game that needs a NES 2.0 header perhaps?

It would be nice to have a toggle switch where user can blank out the left most part of the image that tends to show useless junk. Super Mario Bros 3 is the classic example.

Here is a relevant video I timestamped.

https://youtu.be/wfrNnwJrujw?t=191

Would it be possible to add an extra sprites support option similar to the PCE Core to help with some games that have bad blinking?

In addition to being able to load FDSBIOS.bin manually, could a default location for it be set? So if you load an .FDS ROM and the core knows that FDSBIOS.bin is in /NES, it could boot the BIOS first to save the user from having to load it manually each time.

Another location possibility could be /bootrom

This game doesn't work/load

Making an issue for this game so I don't forget about it

This game has some graphical glitches after you first match two pieces. I'll try to grab some screenshots and post them here.

with NES_20180524.rbf the screen flickers for me over HDMI. I tried on two different TVs. I also tried different roms. With the previous release (NES_20180305.rbf) everything looks fine. I don't know which commit could have caused it.

at stage 2, the game displays error 07

Loads with black screen and music playing
Then the fighters sprites appear with no background graphics

It would be very nice if you can choose between running EU or US/Japan-ROMs (50/60Hz) in the mainmenu (like minimig). EU-ROMs runs too fast (about 20%)

http://www.lostlevels.org/hard-drivin/

This game never got published officially but looks creative programming running a 3d like game like Hard Drivin on NES.

Emulators even Mesen have the road tearing

OG hardware is not supposed to have it.

MiSTer NES core has garbled graphics - only dashboard looks ok.

According to discussions here it looks like mapper 64 / 158, both of which are implemented - the link below solves the wiring needed to be done to make the repro cart, maybe this will help to get the game running on MiSTer as well?:
http://forums.nesdev.com/viewtopic.php?p=125092&fbclid=IwAR17QkVRCSWshpsh1qu4LgceOI4ls_98a-pkUh9r4BEjJvkGonpy0JVaGdM#p125092

Thanks a ton for the great core.

the game is crashing after game intro
previous release seems ok

This game tends to have a few graphical glitches even on real hardware, but on the MiSTer currently, the round will not fully start. You can start a game, and the music will play and you can move the spray can around and shoot, but the round will never actually start. (no enemies appear)

Not sure if this is applicable, but apparently someone was having the exact same issue with their software emulator on nesdev and documented how they fixed it here:

https://forums.nesdev.com/viewtopic.php?f=3&t=12407

Game has visual glitches on boot and when in game is mainly a black screen with some glitched sprites.

During gameplay enter the inventory by pressing Select, you will see that the inventroy menu is glitching.

The first stage of Battletoads/Double Dragon plays perfectly until you get to the stage 1 boss, then the game completely glitches out and becomes unplayable. I tried multiple times to see if it was rng, but it happens every time.

This seems to be one of the trickier games to emulate:
https://wiki.nesdev.com/w/index.php/Tricky-to-emulate_games

Trying to launch it only shows a blank background, often in the colour of the previously loaded game's background:
e. g. light blue if loaded after Super Mario Bros., black if loaded after Galaga

This happens no matter what ROM is used, haven't seen anyone report of it not working so I am wondering if it's just me. Emulators often had the problem with non hacked roms but even the newer musicfix ones do the same.

I've tried several different Roms and this game doesn't seem to load.

Core: 190121

Some games exhibit strange behavior if loaded after other games were loaded. It's almost as if there still some data left in memory/registers/whatever that interferes with the new game. Here's some examples:

Akumajo Densetsu (Japan) (encountered frequently)
Game only loads a single screen of garbage graphical data then never proceeds.

Batman: Return of the Joker, hung music note (encountered once)
Immediately once the game is loaded there is a constant tone that plays throughout the game.

For reference, I'm aware that this is probably just an unsupported mapper.

Game displays heavily corrupted tiles almost immediately, first on the title screen, then in-game. There is supposed to be text at the bottom of the play field and the colors also look wrong (blue door, for example).

Linked Youtube LP for reference:
https://www.youtube.com/watch?v=_LwUwrWfY1s

See attached screen shots.

Core 190409
In the intro music right after you name your character, roughly 15 seconds into the music there is a popping noise that is not present (or at the very least, extremely dampened) on the real cart's audio.
Here's a recording of it on original hardware vs MiSTer: https://drive.google.com/file/d/1Ds94BdIA5Hy7uLJuRPnCht6fbG2fJ9ck/view?usp=sharing

I'm not sure if this if just needs a low or high pass filter, or if there's more to it. Also, I'm unsure if the VRC7 volume is too low or not. I had to amplify it quite a bit to get it closer to the recording of the volume from the AV Famicom (but that could just be how the AV Famicom mixes cart expansion audio).

the game is crashing after game intro
Mapper 76
only NES_20181207.rbf works good

I tried out a few FDS games today and ran into some problems. I tried both manual and auto disk change modes.

Cannot Detect Disk Change:
Michael English Daibouken
Elements of the Shaolin Fist - Ankoku no Maou
Koneko Monogatari

Stuck at Now Loading:
Kineko - Kinetic Connection - The Monitor Puzzle

Stuck at black screen:
Silviana - Ai Ippai no Boukensya

All the other FDS games work great so far!

Is it at all possible to have the games utilize the DDR instead of a required Sdram add on? I thought it was strange seeing core of like Genesis and PCE using the DDR and the NES doesn't. Just curious.

Core: 19.01.21

If you let the intro play, the story text has graphics in some portion (such as the whip) that are garbled until they're on the screen for a little bit. When you start a game and pick up the whip power-up, it garbles the whole screen for a second. This only seems to happen if you let the intro play until you see the garbled intro graphics.

Last night I hooked up my MiSTer for the first time via the new I/O board I got. I am using an VGA to YPbPr cable. I also setup the MiSTer.ini file to include YPbPr output. With the NES core, I get a rolling image on both my Sony CRT and my PVM. However, the video captures fine without any rolling via my internal Micomsoft capture card which is also capturing the YPbPr signal (I have Extron Crosspoint switches).

So there is something that the NES core is outputting that my CRT's do not like but that my capture card corrects. I do not get this issue with the Genesis, TurboGrafx or SMS cores. I also do not see the issue via HDMI out for any core.

I know that analog video out isn't a huge priority but I figured I'd create an issue for tracking for a possible solve down the line.

Example video: https://www.youtube.com/watch?v=N77U3pke3iw

Example image: https://cdn.discordapp.com/attachments/497146208297680907/509192111711715338/IMG_20181105_202719.jpg

I tried to port the Coeff changes(From the Genesis Core) to this Core. While it did work I noticed there was sprite flickering in dark areas. Any idea what would cause that?

It seems like PCM samples can cause an audiable hum after playback.

One good example: Start up the game Blades of Steel. Right after you hear the sample saying the name of the game, a low frequency hum (200 Hz:ish?) can be heard, and it doesn't stop until you reset the core.

Would it be possible to add/edit the Palettes within video.sv? I see it's using a couple from http://www.firebrandx.com/nespalette.html. The Smooth(FBX) is a popular and good Palette for the NES. I poked around to see if I could add this but I couldn't figure out how to get the values for the video.sv file.

Any suggestions on where/how to get these values?

When I cycle through NTSC, PAL, Dendy, I can see that it randomly change horizontal position sometimes on a CRT.
Cycling through them again may or may not fix pal horizontal position.

Can it be related to the PLL clock done recently?
This does not happen on the snes core with the new pal pll code, only on the nes core.
This is not my TV, since it doesn't happen with other cores, only the nes core.

@Kitrinx
Sometimes in NTSC mode, it cuts the left column of pixels in the Grid test pattern in 240pee, on HDMI too!
Happens after cycling through the regions (System Type).
edit:
Happens on the NES_PAL test build on Discord before the PLL changes.
So it is something related to changing regions.

I am getting this too when scrolling to the right but it also happens with builds before this change. It seems it is caused by something after June 15th because with that build it doesn't happen.

Also those blocks are all background tiles. The only sprites are Bomberman and the enemies.

Indiana Jones and The Last Crusade (Taito) shows some flickering lines that shouldn't be there in the title screen.

Core 190409
At the very least one of the early music tracks in the game has a very high pitched portion that doesn't "seem" correct. I don't have an original cart of the game to compare against. (It would be helpful if someone with the original cart could confirm)
Here's a recording of it from the NES core: https://cdn.discordapp.com/attachments/497145588446396416/565682993235230730/JB.flac

The first portion is the music playing normally and you might or might not hear it easily depending on your speakers/headphones/ears. It then cuts over to only play the MMC5 audio where it can be clearly heard.

https://wiki.nesdev.com/w/index.php/AxROM

Can be seen in the top row of pixels in Battletoads or Battletoads & Double Dragon in the intro demos.
Both these cartridges use AOROM which according to the link above has some "bus conflicts".

No visible pixel glitches in Mesen emulator with these games.
I don't know if that happens on real hardware with real cartridge.
I have Everdrive N8 but it has FPGA emulated mappers too, so it's not a good reference.

Asterix has heavy graphical corruption once you get into stage 1. It is highly likely this is because the core doesn't seem to have any options to simulate a PAL NES. The game also has graphical corruption on a real NTSC NES.

Core: 190121

There's graphical corruption in the game. The most noticeable is the title screen. in-game seems to be more minor.

GoodNES v3.23b Roms
Mapper#32 Major League (J) [!].nes (d8dfd3d1) Outfield area incorrect
Mapper#33 Power Blazer (J) [!].nes (2b17a194) start game, background tank Graphic broken
Mapper#33 Takeshi no Sengoku Fuuunji (J) [!].nes (5c80a4a2) Graphic broken
Mapper#68 Maharaja (J) [!].nes (b9083fde) Graphic broken
Mapper#80 Fudou Myouou Den (J) [!].nes (6e1f3c62) Graphic broken

https://youtu.be/hEU5duLVxqM

A great feature would be the ability to overclock the NES to enhance games (not accurately of course). Something like what Mesen, Nestopia UE, or FCEUX has would be amazing. Here is a demonstration of it in action in FCEUX:

https://www.youtube.com/watch?v=VzQE4pLjhg4

I opened a bounty for this starting at $30 here:
https://www.bountysource.com/issues/75624079-feature-request-overclocking

Please add to the pot, if you'd like to see whoever implement this get at least a little something for their hard work! :D

The game pauses itself. If you press start to unpause, it pauses itself again.
The game is therefore unplayable.

I have tested over 100 games on the NES core, and all of them work fine in the default video mode, and with dvi_mode set to '8 - 1920x1080@60', with the exception of Contra.

When loading Contra in 1920x1080@60, there are graphical errors on the loading screen, and then when the first stage begins, the entire screen as garbled graphics, and gameplay is not possible. Returning back to the default dvi_mode fixes this issue completely.

I have not been able to replicate this on any other games, or any other cores.

Core 190409
Game loads to title screen fine, but it keeps loading the disk to side B over and over after you hit start. Change the disk swap to manual (button) doesn't fix the issue either.

Select any stage and you will see corrupted tiles that are not there on console. Note that the US version, Power Blade 2 runs as intended, however that version uses MMC3 while this one uses Mapper 033, described in

https://wiki.nesdev.com/w/index.php/Talk:INES_Mapper_033

EDIT: Also note that Bubble Bobble 2 (Japan) also breaks on Round 8. There are some logs in the background that should be scrolling from left to right, but they don't appear to scroll on MiSTer currently. I bring this up in the same issue because this wiki entry leads me to believe the 2 bugs are related

I noticed that some text was getting cut off from Tecmo Superbowl on the left hand side as seen below.

I made my own build after tweaking video.sv and changing

HBlank <= (hc > (256-8)) || (hc<9); to HBlank <= (hc > (256-8)) || (hc<7);

I don't know if that screws up the resolution at all but if the math checks out it might be worth changing if what I did is correct.

Core: 190121

The FDS audio is inaccurate/wrong. One noteable example is in Almana no Kiseki. For lack of a better word, some of the music "flutters". That doesn't happen on original hardware. Here's a video of what it should sound like: https://www.youtube.com/watch?v=usCCn_dnl4I
Compare the intro and 1st level themes in the video to how they sound in the FPGA core.

NES controllers are traditionally B on the left, A on the right.
Currently the primary "OK" button is mapping to A, and the "Cancel/back" button is mapping to B.

This can be remapped to be positioned correctly, but then the OSD functions are reversed.