Emulation issues

posted by Jabo Help Comments67
This is not necessarily always up to date. For providing information on problems you are better off replying to the release thread.
version reporter description
1.0iconoclast Chess Master does not work properly
1.0squall kirby adv (u) only text area shakes
1.0.1Bippo Ernesti Gimmick save state issue
0.6jabo Life Force fire stage scroll weirdness
0.6Will4u Rad Racer(s) has minor glitches
1.0Will4u Marble Madness "Time To Finish Practice Race:" display is very glitchy
0.6unknown Back to the Future 2 & 3 weird palette
0.6xamenus Spiderman and the Sinister Six, weird scrolling issue
0.6Crazy Brute The Legacy of the Wizard (Dragon Slayer 4) boss battle crash?
0.6unknown Fester's Quest crash at specific point, other emus too? fixed?
0.6jabo Castlevania 3 screen flash after you beat a boss
0.6jabo Adventures of Dino Riki
1.0Riony Tiger-Heli constantly flashing
1.0Pelayus13 Wai Wai World 2: hub in the lower part of the screen is not visible
1.0Wiill4U Firehawk glitches
1.0Gerhalt Alien Syndrome graphics incorrect
1.0Gerhalt Monster In My Pocket graphics incorrect
1.1JP Demon sword graphics incorrect
1.1JP Bo Jackson baseball graphics during at bat
1.1Kettle Controllers with same name selection issue [unverified]
1.1Gerhalt Crisis Force title screen incorrect
1.1NesAddict TMNT1 crashes in stage5 at technodrome
1.1Kirbyfan Mike Tyson's Punchout extra bell ring
Comments are shown below

DominicanZero 1187803602000 #1

There's a small bug on the file browser in the app. If you name a ROM so that it contains a period in the filename BEFORE the period that divides the extension from the name, the program won't recognize the file and refuse to play it. It's a minor issue, but an issue nonetheless.


roy_mustang 1231173712000 #2

Zipped roms don´t show artworks


Wiilol4U 1235577865000 #3

I really like using Jnes and I think it is great. I love the cheat support and I am having problems adding a lot of codes for games at once. When I keep clicking in a different window to see the cheats and Copy and Paste over and over again in the boxes, I get a crash window. It says "Jnes encountered a problem and needs to close". I don't think this is major becuse I can just re-open the emu and continue. If anyone had this problem and fixed it, tell me.


adam 1235578209000 #4

jnes is great and i think it should support .fds (Famicon) roms and the bios rom for it.


Andy 1235605543000 #5

The PayPal Donate doesn't seem to work.

Excellent program btw, been using it for years


Jabo 1235917690000 #6

cool glad you like it, and thanks the button was broken good old paypal haha easy to fix


MYSHU 1260971807000 #7

Kabuki - Quantum Fighter has a graphic bug and background is black on level 2-2 (i can see sprites)

same thing with EUROPE and USA version.


reply updated 1261144006000

darkness 1261254454000 #8

please build a tool that convert jnes 0.30a save states or save battery files to the newest jnes 1.0.1 i have a lot of save files i played in the old emu and i dont want to lose please thanks


Jabo 1268248595000 #9

please build a tool that convert jnes 0.30a save states or save battery files to the newest jnes 1.0.1

battery saves are actually portable between versions, you just need to copy the .sav file. I stopped trying to do save state conversions a while ago unfortunately it just simply doesn't work too great.


MaxDolina 1268319112000 #10

A minor issue I've noticed is that games like Duck Hunt, etc, which use a different input method, won't work with the video capture feature.

P.S. Jnes is a terrific emulator and we all appreciate your hard work.


DarkRubes 1271596019000 #11

Using version 1.0 and I'm running into problems with Jaleco's Bases Loaded. The game plays fine until you go to change innings for the first time, then it locks up. I'm thinking maybe if I update to 1.0.2 that might solve the problem. I will update and post my results.


DarkRubes 1271607162000 #12

Update: Tried it in an older version (0.5.3) and a different version of the ROM and still the same result. So I'll hit up the ngemu boards and see what I can come up with.


squall_leonhart 1271611888000 #13

SMB1 is too fast


hank6lt 1271677577000 #14

i accept with leonhart . tested , but its too fast,, i just wanted to listen starman music


Jabo 1271695454000 #15

I'm thinking maybe if I update to 1.0.2 that might solve the problem. I will update and post my results.

I think I was able to reproduce this, if you turn extended vertical blank on it seems to make this a bit better, should add that to the known issues page at some point, thanks for letting us know.


JC 1272413513000 #16

I am unable to open this on my 2nd monitor to run fullscreen--only windowed. When I try to run full screen it goes back to my first monitor. Any suggestions?


hjeedio 1272570397000 #17

I am running Dragon Warrior III and the graphics flicker whenever I move. The effect is less pronounced when I enable triple buffering but it still makes me dizzy. Is there a to make the flicker go away completely?

Windows 7 Home 64 bit
Nvidia GeForce 9800 GTX+
AMD Phenom II X2 550 3.1 Ghz processor


Jabo 1272917593000 #18

I am running Dragon Warrior III and the graphics flicker whenever I move.

I don't have anything to add really, I noticed this scrolling artifact but it seems to be the same in other emulators as well, it kind of makes me dizzy too.
I am unable to open this on my 2nd monitor to run fullscreen--only windowed.

Yea after looking at this briefly it is broken unfortunately, the support is incomplete and tricky, perhaps I can finish this off sometime.

reply updated 1272921937000

DarkRubes 1274023150000 #19

@jabo: Excellent! It worked. Thanks so much for the solution.


Riony 1276705277000 #20

Tiger-Heli doesn't work at all. It's constantly flashing



idea 1278662411000 #21

I have new idea to create for new jnes version. Something like nsf2mid - live audio in midi playing - user can choose the instruments for pulse triangle etc. or choose the standard nes sound. I think its not difficult to create. Please read my message and think about this.Sorry for my bad english.


squall_leonhart 1278712693000 #22

yeah.. not even possible.


Wiill4U 1278829789000 #23

Needs more Mappers like 90 and 182. Some rom hacks and other games don't load at all.

I will list some problems with games and hacks that I am having.

Normal Roms:

World Class Track Meet
[emulator needs power pad input support]

Super Mario Bros. 2 (J)
[needs .fds associations & bios rom support]

Doki Doki Panic (J)
[needs .fds associations & bios rom support]

Cobra Triangle
[glitchy graphics: Enable "Extend vertical blank by one scanline" to fix]

Dig Dug II - Trouble in Paradise
[loads rom & title screen, but freezes when you choose a Player game]

Eliminator Boat Duel
[glitchy scrolling in first area: Enable "Extend vertical blank by one scanline" to fix]

[very glitchy & freezes game when start playing]

[loads rom but freezes]

[glitchy opening]

Kirby's Adventure
[hud at the bottom of the screen shakes slightly]

Marble Madness
["Time To Finish Practice Race:" display is very glitchy]

Power Blade 2
[hub at bottom of the screen shakes up & down]

Rad Racer
[the road ahead is always glitched]

Rad Racer II
[the road ahead is always glitched]

Solar Jetman - Hunt for the Golden Warship
[glitchy scrolling: Enable "Extend vertical blank by one scanline" to fix]


Super Contra 3 (Unlicensed)
[Error: Mapper #90 unsupported/doesn't load]

Super Mario World (Unlicensed)
[Error: Mapper #90 unsupported/doesn't load]

Super Donkey Kong (Unlicensed)
[Error: Mapper #182 unsupported/doesn't load]

Sorry for a very long post, but hope this helps.


Jabo 1278841879000 #24

When I keep clicking in a different window to see the cheats and Copy and Paste over and over again in the boxes, I get a crash window. It says "Jnes encountered a problem and needs to close".

I'm not sure how to reproduce this problem, which dialog were you in and what exactly did you do to cause this?

I will list some problems with games and hacks that I am having.

Cool thanks for the infos!

reply updated 1278841914000

venom22677 1279142673000 #25

the game genie doesn't work for legend of zelda and i was trying to use it to help my gf on one part but it didn't work


squall_leonhart 1279149776000 #26

works fine.


Pelayus13 1279363851000 #27

First, thanks for the awesome work you won't believe how much nostalgia this brings, second, i'd like to add some minor problems for checking if i may:

Adventure Island 2: general flickering on anything but sprites in any level that involves vertical movement/scrolling, whether ascension or diagonal movement

Wai Wai World 2: hub in the lower part of the screen is not visible

Once again, thank you for the work and time spent into making this possible.


justin 1285744746000 #28

No complaints just thank you so much im hooked and very impressed cant wait to try the 1.02


Gallo 1285929835000 #29

Hi first of all thanks 4 this awesome emulator its mi main and only option to NES, i have a couple of questios why is that in some games i have a flickering image issue?? like in contra, double dragon 3, snow bros, its my laptop or is the current configuration?

thanks in advance!!


justin 1286190197000 #30

Its me again just upgraded from .6 to 1.02 first two things i noticed were a much needed fix in the dpad settings and zelda 1 no longer flickers when links bombs go off. Awesome so far thanks for project 64 also great. The only 64 emu worth having runs perfectly


justin 1286190569000 #31

DOESNT NEED FDS support i have all the fds i need and someone had taken the time to convert them all to .nes format before i downloaded them and they run fine on this emu. Hope someone finds that helpful


squall_leonhart 1289343792000 #32

the GUI menu's tend to become unaligned after closing a rom.
seems it might be related to the fact the entire windown increases slightly in size when launching a game but doesn't return to the pregame size afterwards.

reply updated 1289343867000

Jonathan 1294654911000 #33

I tried using Jnes 0.6, and I keep getting a DirectDraw message "Failed to create render target." I tried using "DxDiag" to fix the problem, but I'm still getting the message.

Also, my games work so slow if I use 512x336 or higher size.


Jonathan 1294654961000 #34

By the way, it also happens if I use a different NES emulator.


Deluge 1315934065000 #35

I wanted to report a problem with encoding Jnes videos to AVI. I'm not sure if it's just my system or a problem with the emulator. Most of the time after encoding to AVI the video is unplayable. It turns out that some of the headers don't get written. I believe it's the RIFF header that ends up missing. I haven't seen anybody complaining about this so I am wondering if it is just my setup.

If anyone else is having this problem, I have created a video on Youtube that shows how to fix the broken AVIs: http://www.youtube.com/watch?v=vnwdVjHk1gk


Jabo 1315939805000 #36

I just tried it out again in 1.0.2 to make sure, and it works for me with the default windows codecs. The header not being correctly written sounds suspicious as I have not had that problem, assuming you finish rendering the movie from start to finish I can't understand what would cause that.


Deluge 1315977696000 #37

I think I've figured out what the problem is. It's actually kind of interesting and would explain why I didn't see anybody else complaining about this. The partition of my hard drive to which I am writing the videos is not formatted as NTFS, but rather Ext2. I can't explain why it would cause this, but so far all my attempts to write to an NTFS partition have been successful. Something about the Ext2 filesystem must prevent the RIFF header from being written. About 95% of the time the video would not play and I would have to repair it.

My guess is that someone trying to run your emulator under Linux using WINE would experience the same problem. I will keep testing it to make sure and maybe I'll see if I can get the same results using Linux/WINE.

Don't worry, I don't count this against your emulator, it's made for Windows not Linux. It's still, in my opinion, the best NES emulator available. Though a Linux port would be awesome, Fceux for Linux has issues.


Jon 1316179116000 #38

The Jnes 1.0.2 emulator works fine when the window size is 256 x 224; but the game runs too slow when I change the size to 512 X 448, even though my computer is fast and has lots of memory.

The main reason I do not use the small resolution is because the words are too small for me to read/see on my laptop.

Is there a way to fix this without having to use the smallest resolution or a newer version of the emulator?


Jazon 1316207719000 #39

I'm playing Zelda II and noticed if I tap left then right, link slides across the screen really fast. I don't think that is intended behavior. This is in the enemy screens not on the map. Are there any settings I should play with to get that to stop?


Jazon 1316208357000 #40

Looks like a known glitch with the game nothing to do with Jnes.


Deluge 1316388454000 #41

I wanted to give an update. I'm sure now that the problem is in writing to an Ext2 Filesystem (and maybe Ext3/4 but haven't tested). All of my attempts to write to NTFS have worked.

I have also tested Jnes under Linux using WINE. It seems to run fine (needs a fast computer), but has problems encoding to AVI. The problem is different: In this case the RIFF header is about the only thing that gets written to the video and it doesn't matter to which filesystem type you are encoding. I'm pretty sure that this is a problem with WINE itself and not Jnes.

Thanks again for the awesome emulator.


Yoshistar95 1346835835000 #42

Hi there!
I'm using also Jnes... version 1.1 at the moment.

But I have a problem... everytime if I want to play Super Mario Bros. 2 Lost Levels, then the emulator sees it as a #40 mapper unsupported ROM... what about that? If it's a bug, then this must be fixed then...
I play instead of that a hacked version of SMB NES into SMB2J. And it miss World 9
So that's my main reason why I really want to play Lost Levels! I want to beat World 9! And the red plants are missing too, except upside down ones...

If there's a working ROM... please tell me.
You can also find me on Youtube


NesAddict 1349212847000 #43

I ran into a couple graphical glitches in the second quest of Castlevania III Ntsc (U) version On jnes 1.1. On stage one there are these skull heads that replace medusa heads in the second quest, you can see them if you input the name "akama" they come out all garbled. Stage 2, the clock tower, you can see there is a blue knight that's all garbled too, and further in the level there is an electric orb thats supposed to go around in circles on a platform that comes out garbled. I've uploaded some screen shots of these enemies. http://imageshack.us/g/692/snap0003ztk.png/


NesAddict 1349245220000 #44

Teenage Mutant Ninja Turtles 1 NTSC U version crashes to black screen when you find the technodrome in stage 5. Jnes version 1.1


Jabo 1349310074000 #45

But I have a problem... everytime if I want to play Super Mario Bros. 2 Lost Levels

Yea that is unsupported

I ran into a couple graphical glitches in the second quest of Castlevania III Ntsc (U) version On jnes 1.1

Cool thanks for letting me know, it may be some time before I can get to looking into these things

Teenage Mutant Ninja Turtles 1 NTSC U version crashes to black screen when you find the technodrome in stage 5. Jnes version 1.1

Verified this recently, will address in next version


Yoshistar95 1349370719000 #46

Are all SMB 2 LL ROMs unsupported?

But I've found a bug with the Game Genie Codes system...
I played Super Mario Bros. and I use the codes, but when I turn them off, it won't take effect in the game
It's not the game itself, I've checked that for if there was something else.

It doesn't take effect also when I reset the game... also power off/on method doesn't work. But it take effect when I shut down the current ROM loaded...

By the way... it's the 1.1 version.


Jabo 1350240140000 #47

Game Genie codes modify the actual code of the game, so each code will behave differently, but this was typical behavior from what I remember. Keep in mind the actual Game Genie cartridge made you enter the codes before the game loaded.


Yoshistar95 1350247964000 #48

So it's a typical behavior? I'll remember that.

Super Mario World gets the message 'Mapper #90 unsupported' when starting up. What does that mean?


MikeB 1360432562000 #49

Hi, I am new to JNES (or any emulator). I am over 60 so I an not really computer literate. I have managed to put a couple of games into JNES and they run fine, my problem is with "Bandit Kings of Ancient China". When I try to run it the graphics are completely garbled up. Am I doing something wrong or is there something I need to do extra to get the game to run? Thanks for any help, it will be greatly appreciated.


Anonymous 1366581345000 #50

It'd be cool if there was an option for mapping the jnes file menu to a button on a game controller (aka the alt key), and then be able to use the direction pad, and a button for clicking stuff. I'd like to be able to quit jnes with a game pad.


kirbyfan 1369517896000 #51

One problem with Jnes these games are missing tthe mappers to work.

Action 52.
Don Doko Don.
Don Doko Don 2.
Mappy Kids.
A boy and his Blob.

Thats another problem.


Binyul 1369706688000 #52

I cannot use jnes to play nes with multiple games ( 7 in 1 Mario etc)


The Moonshade Hero 1371803503000 #53

The emulator controls are an issue in The Legend of Zelda II: The Adventure of Link... it will happen when left and right are both pressed (when playing with keyboard), and also if Link has not become immobile before you make him go the opposite direction. It will make him slide, sometimes very fast, and can even be abused to go through a locked door without a key! Anyway, it is annoying, needs to be fixed.


DarkenLX 1372371295000 #54

Bubble Bobble - Sprites Corrupt themselves


Yama 1374979062000 #55

Ninja Gaiden 2: Having issues with moving background (and foreground for that matter) on the second level of the game with the train. The graphics flicker in the background, constantly switching between moving scenery and stationary scenery. Dunno if this has been addressed before or if there is anything that can be done. Just thought I'd mention it. I'm guessing cause you have Ryu Hayabusa as your pic you probably have dealt with it or heard about it already. lol


Jabo 1375397072000 #56

I thought that was fixed in the latest release actually, have you tried out a recent version?


James 1399538851000 #57

I cannot run Nintendo World Championships. I don't know if it can be run this way (through the program) since it was a special cartridge (talking about the switches, etc).


Kabogh 1399550192000 #58

I cannot add more than 14 artworks


Link 1399607296000 #59

Duck Hunt VS does not open


Wario 1407769902000 #60

Nintendo World Championships, Action 52 and similiar roms wont start


Brian Johnson 1416495347000 #61

I noticed a problem when I tried to load the game "power blazer (j).nes".

What happens is, when I doubled-clicked on it to start the game instead of loading up the game, instead it shows the following message at the bottom of the screen: "Error: Mapper #33 unsupported". Check this out and fix it please.


Brian Johnson 1416496859000 #62

I forgot to mention the game "Salamander (j)" doesn't load up either, it has the message on the bottom of the screen: "Error: Mapper #73 unsupported" as well - it will not load, please check this out; thanks a bunch.


draco969 1435384816000 #63

i downloaded 1.1.1 but when i load a game it does not recognizes my keyboard inputs, only the hotkeys. i tried the 5.1 that i had already on a different partition that used to work but it did the same thing. i tried 1.1 also and still the same problem.


Ninjavania 1438337242000 #64

The Vrc6 chip sounds incorrect. In the Japanese version of Castlevania 3 on the levels that go upward the screen shakes for some reason, but I still love the emulator, 10 out of 10. Thank you everyone at Jabosoft, love you guys.


Problem 1454178947000 #65

When i open "Super Mario Bros 2 (Lost Levels) (Unl) [T+Por1.0c_Mr.Magoo]" it says:
"Error:#Mapper40 unsupported"


Telovis 1455679430000 #66

I have this problem where when I go to set up my xbox one controller (using usb cord) in inputs the entire application crashes. This is a pretty big problem and I hope there's a way to fix it


Blingtendo 1494305150000 #67

When i tried to play the translated Akira rom i got the Mapper #33 error, this is on 1.2


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