As the title says, the top row of pixels on the screen doesn’t scroll like it should along with the rest of the background.

Game wont start after title screen. Locks up.

This is a list of issues that I am aware off:

• PPU Timing issues ("Super Hunchback" blinking lines, prehistorik man ,street fighter 2 blinking background...)
• GBC Hicolour mode (probably related to ppu timings)
• Donkey Kong Country GBC freezing
• Mega Man extreme GBC unplayable (no ground , mega man falls to death)
• Missing Sprites (Prehistorik man, super mario 2 dx , xenon 2)
• Wave channel has noise in some GBC games/demos (e.g.: Bad Apple)
• General sound crackling in some games (Final Fantasy Legend III and Gargoyle's Quest intros)
• Test Drive 6, 2001 and Offroad don't show the initial intro and menu but go in-game (by pressing A blindly)
• Test Drive le mans crashes after the language selection
• Konami GB Collection Vol.4 (GBC) white screen in intro and graphical issues
• Konami GB Collection Vol.2 (GBC) white screen in intro and freezes
• Input not working in Shantae's dance minigame , freezes at the end (Input is working , freeze at the end if 0 gems won is original game bug https://www.romhacking.net/hacks/3785/ )

The Smurfs on Game Boy doesn’t get past the Nintendo logo (alternatively goes to white, blank screen after system boot with GBC bootrom/bios).

Only tested Rev A since that’s the only version I have available. Asked more people to test on MiSTer FPGA Computer Facebook page and at least one other person confirmed the issue.

Dragon Slayer (http://www.hardcoregaming101.net/dragon-slayer/) boots up fine but after the Nintendo logo, I get a blank screen and no sound.
Anyone know about this one?

I have been doing some A/B comparisons between MiSTer and a DMG. Happy to report it's really good (even fooled some chiptune producers). The only issue is that using the I/O board, left and right audio channels are reversed from the DMG. Not sure if this needs to be fixed in the core or in hardware.

Here's some recordings:
DMG - https://drive.google.com/open?id=11R-NB4dmdAKJjca-1M1-ANlJHEvbJwWv
MiSTer - https://drive.google.com/open?id=1NIJGMaJxmMwcy1Ih5HfZWV78CT5OIDvJ

Greetings,

The Gameboy game Altered Space features a variety of graphical glitches. Lot of stuff is garbled, and the actual game seems unplayable when it begins. The exact same glitches happens on all versions of the game I could try.

Best regards,

The previous core didn't flicker, but it also didn't have the 2nd scrolling layer.

The new fixes added the 2nd scrolling layer, but now the whole image is constantly flickering.

Second row of pixels on the screen, in the status area, flickers randomly during horizontal scrolling.

I will post this in the MiST version too.

I've composed a bunch of tunes for Gameboy almost 20 years ago - but it doens't work when I load them into SRAM for the Carillon Editor (copying it to the sdcard in saves/gameboy/carillon.sav ). The data doesn't seem to get loaded.

I've attached the .gb for Carillon Editor - and .bin and .sav files for one of my tunes for testing.

gameboy-save-load-issue.zip

The Carillon Editor author Alexi Eeben wrote about this issue:
"maybe it’s ”emulating” a wrong memory controller? The old flash carts were (if I recall correctly) of type MBC5"

In Carillon Editor ...
Load tune = click Start button on LOAD FROM SRAM
Play = click Start twice on BLOCK ORDER LIST
Save tune = click Start on STORE IN SRAM

Any ideas how to make it work?

Not sure what’s going on here, but DK 94 for GameBoy has frozen at the same point repeatedly just after clearing the first board. DK takes Pauline up the ladders then Mario chases after her and ... nothing. Bottom half of the screen clears out and game hangs. Is anyone else seeing this issue?

The Gameboy version of Darius called Sagaia hangs at the Nintendo Logo, tried different dumps.

Extended color palette doesn't work.

Here are comparisons with two games: Black Diamond Fever and Evil Mirror

What is the possibility of adding support for a link port? I understand it would require a special I/O pcb, but many would probably be interested in having this available. Luckily Gameboy link ports are still being made. If support is added I can design a custom I/O board that has the hardware needed.

Hi,

I've been tinkering with the video configuration for TVs on the README and I improved it (at least on my TV :)

With the current configuration the image is in a small square in the middle of the screen, to achieve full screen I set vscale_mode=0, the problem was the image now is too big for the screen. I changed the video_mode slightly to solve that.

This is the final configuration:

[Gameboy]
video_mode=320,8,32,24,215,14,3,31,6048
vga_scaler=1
vsync_adjust=2
vscale_mode=0

Hope this helps!

Is it possible to import/export SRAM data?

Seems that the defined keys on trip world GB japan only release, seems to change from time to time, sometimes its correct, sometimes A and B switches places, and then goes back again.

Hello, and thank you for the amazing work!

In Return of the Ninja, a Gameboy Color game, the screen flickers and fade to almost all black excepting the UI items when entering the first stage. It happens on the both the USA and European game (there is no Japanese release to test), and whether the sync buffer is activated or not.

Best regards,

I do get normal audio from the Gameboy core on my Samsung tv using hdmi, but get no audio when using elgato capture card or the capture card's hdmi passthru.

Jetsons: Robot Panic (https://www.gamesdatabase.org/game/nintendo-game-boy/jetsons-robot-panic) does not run. After the Nintendo Logo there is only a blank screen without any sound.

Simply load the game and after the company logo's the game will be black and nothing after.

Super Gameboy : Off, or Pallette
Scandoubler Fx: (some option enabled.)

results in appropriately sized screen according to vscale_mode.

Super Gameboy: Off, or Pallete
Scandouble Fx: Off

results in screen larger than TV. Image is cut off.

Super Gameboy : On
Scandoubler Fx: Off

results in appropriately integer scaled screen as well as slightly smaller for 'border' allowance.

In short : Only way that GB core will follow my ini setting is with some scandoubler effect enabled.
Seems strange behaviour, but other users have also reported. I'd like to use chosen scaling without scandouble option if possible. also seems strange that Super Gameboy option with fit to screen option first fits to screen, then some ms later exceeds the screen. As it should make it smaller.

Edit = Not VSYNC , intended vscale_mode.

Compared to release 20200331 version 20200510 outputs a much smaller screen and controls in Alleyway do no longer work. It looks like A, Start and D-Pad left are being constantly pressed, starting the game without user input and locking the paddle on the left side.

Different vscale, vsync and video-modes seems to make no difference in this behavior.

After the core was loaded, the Gameboy-Logo is missing.

Hi,
This rom is 1Mo size.
There is 3 bomberman games available in this collection.

When we select a game one of 3 games, the game seems to reboot and propose again the 3 games.

Thanks,

Hi,

Saw the latest patch enabled 15khz output and I was super excited to try it. While dual outputting to a CRT and my crappy flatscreen, I noticed that black screens/blank screens cause a temporary interruption of sync on the HDMI output only. I rebooted the MiSTer with only the HDMI out and saw the issue again. It is pretty easy to reproduce. If you boot up GB tetris and start a game, the screen goes black until the first piece (at speed 0) is halfway down the screen. If you boot up Pokemon Yellow, you'll notice the intro cinematic and any time you enter a battle will cause a loss of sync as well. Forgive me if this is a known issue with the latest patch.

How to replicate: Just load the game first level you will see it all broken.

per our discussion brNX, here is the issue. So, the time that displays at the top of the screen, centered, has some glitchiness. Some of the digits will disappear, reappear, then go away entirely. Attached are some screenshots, from Alan's new utility.

Hi,

There is some missing sprites on this game. The missing sprites are on the bottom bar.
For example, when you tried to hit the ball you normally will see an intensity bar of the power of the swing. It is not present for the moment.

Thanks,

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 but not as often issue with the NES and Master System core. Any idea of what's going on and how to fix it?

Thank you

So, when you load up a standard non-colour game in a real GBC, you get the standard boot intro and then the game loads with a predetermined palette if the game ID is found in the list in the bootstrap rom (https://tcrf.net/Notes:Game_Boy_Color_Bootstrap_ROM). Palettes can be set with a button press when the Game Boy logo loads. Benefit of using GB games on a GBC include that there's actually more colours in play - sprites have a separate colour.

Anyway, it's pretty glitchy on the current core build. I've taken some comparison photos to explain. MiSTer screenshot first, real hardware second:

I prefer the GrafxGreen color palette, so after loading it, I chose “Save settings”, expecting it would stick. But the next time I loaded the core and launched a non-color Gameboy game, it did not automatically restore the GrafxGreen palette. I have to go load it manually every time I boot the core.

In Final Fantasy Adventure (md5: 24cd3bdf490ef2e1aa6a8af380eccd78) the name entry screen is broken as there's no cursor behind the letters on the screen. I've tried the official gbc bios and the dmg bios and the behavior remains the same.
Is this a known issue? If it helps to replicate, this is with the 128mb ram module installed.

Using v200331

After you complete a level, “Next Stage” is supposed to display with black text over a white background with your ship in the bottom left corner. Instead, the screen goes black with no text displaying, though, your ship is still correctly shown in the bottom left corner.

In the mister, we are not able to start this game the button "A, B and start" are not effective.
There is just the button select working, we can go from "1 player to 2 player, to other selection" in the menu.

I tried the same rom in BGB and we can select "1 player" with the start button and go to next selection menu.

Thanks,

Hi,

I don't know if you are familiar with mooneye-gb, but that project offers a suite of small .gb ROMs carefully designed to check wether or not emulators can reproduce the exact behavior of real Gameboys.

Here is a direct link to the test suite.

Found those games stuck after Nintendo logo (roms tested on BGB without this issue)

• Chousoku Spinner (Japan) (SGB Enhanced) (Sha1 : 057a3251bbb7eb4e04b01f786bd2986af5eabc58)
• Daikaijuu Monogatari - The Miracle of the Zone (Japan) (SGB Enhanced) (Sha1 : 44cafcb56f470881b67e57c0649afbc638cda136)
• Daikaijuu Monogatari - The Miracle of the Zone II (Japan) (SGB Enhanced) (GB Compatible).gbc (Sha1: 7bf6e2d7fc58e8abe61785e413bcf4150fa8bee5)

Thanks,

Both the title music and the gameplay sound effects contain high-pitched noises and distortion that are not correct.

Castlevania Legends is unplayable in Super Gameboy mode due to corrupted graphics.

Immediately upon startup the Konami logo doesn't fully display as it should.

Once the game begins the graphics quickly start getting corrupted.

After a few seconds all you can see are the health and heart bars. Otherwise it's a totally blank screen. The game is still running but cannot be played.

Please forgive my poor photos. I'm happy to help troubleshoot however needed. Correct behavior was verified using a real SGB2.

Start a new game and you will see a Harry with a transparent body and missing legs... also, the text is cut off.

In the GBC game Perfect Dark the PCM sound (which plays a relatively big part in this game) does not work.

Steps to reproduce: press start a few times once the game boots in order to select a new game and have the game automatically create a name for your save file. After the name entry screen, an intro dialog screen will appear. This dialog should be fully voiced via PCM samples, but instead there's silence. Same goes for all the gunshots, footsteps, and various grunts/yells the characters make throughout the game.

Example video with the PCM samples in the intro playing correctly; relevant section starts at about 54sec: https://youtu.be/xeLNNsVPSCA?t=54

On a real Super Gameboy 2, games which do not have their own border are assigned a default one which resembles an original Gameboy. See below:

The current MiSTer GB core does not do this so if you have SGB enabled you end up with a tiny gameplay window and no explanation as to why. We should match behavior of the actual hardware. If a game does not have its own defined border we should display the default one.

Additionally, real SGB2 includes several built-in borders for games which don't have their own. These borders even have their own animations.

See https://www.youtube.com/watch?v=JU5OBrDlOR8 starting at the 5:13 mark for in-depth border behavior on real SGB hardware.
See https://www.youtube.com/watch?v=JCjJAcM6hI8 for an overview of all built-in SGB2 borders

If our goal with MiSTer is hardware accuracy, SGB behavior should fully match real hardware (with the exception of features which require a SNES which I know it cannot do). With SGB enabled a border should always be shown (unless palette mode) and the user should be able to change to any of the other built-in borders.

I think this would be a great addition and BIG thanks to the devs for their hard work on this core.

Tried Alone in the Dark, Tomb Raider - Curse of the Sword, Micro Machines V3, Perfect Dark and Shantae. Bad seed?

After you start a new game, most if not all the text is missing.

Core used: Gameboy_20190711.rbf

Steps to reproduce:

1. Start a new game from the title screen and watch the intro.

ROM used is the US release of Resident Evil Gaiden, CRC32 f8c5021b

compare to https://www.youtube.com/watch?v=CMjDDVkNBW0

Hi,

I notice that if you play through enough of pokemon crystal to obtain your first 'mon, you'll notice a blanking out of vertical strips of the screen. If you talk to someone outside, it'll paint over a strip as the beige/white background color. If you talk to someone indoors, it'll paint a black strip. The miscolored column will persist until you walk it off the screen and walk it back on.

Thanks

After you finish a level, a pop up is supposed to appear showing the levels in the current section and your clear times. This instead shows up as blank.

Gameboy_20190928.rbf

In all games I tested (via HDMI), the last column of pixels (most right) is shown on the left side of the "screen" (most left pixels). I think this misplaced pixel column is also shifted down a bit (1-2 rows). If you're already aware of this bug, feel free to delete this issue :-)
If you need to have more info, I will gladly assist and do what I can to help.

I would love to have the GameBoy available on my CRT.