Kega Problems

[Sereness]

So uh... I haven't seen this topic touched upon in a fat minute, and google searches don't help.
Anybody happen to know a genuine fix for the slow issues with Kega? I'm no tech wizard, but maybe somebody here could dig around in it and try to figure out why some games play so slow on it on modern systems? I tried playing Pulseman and the game is much slower than it is supposed to be... I also tried playing some gamegear games and those are really slow too. No idea what is causing it, I've tried everything old threads suggest, as well as whatever google spits out at me.... Nothing... *shrug*

 

[Miles Miles]

What are your hardware specs?

 

[Moreno909]

Try disabling v-sync or some of the special settings

 

[Rocket2049]

Kega Fusion hasn't been updated in 15 YEARS so you might wanna use just anything else
genesis plus GX, Ares, PicoDrive, and BlastEm are still being updated

but funny enough i do use Kega fusion myself, or Gens (so old lol)
makes me wonder if i should try something newer lol
windows 10, gtx1050, 8gb ram, intel i5 8th gen, dell laptop

tested sonic 3 and knuckles, including going to Super sonic, which makes you very fast, no drops in fps just 60, tested turbo outrun, contra hard corps, both are 60fps everywhere
my v-sync is on, if i shut if off it tears like crazy on sonic 3 anyways.
and i can fast-forward to 999 fps (and i don't see a way to fast-forward less lol)

also check the region settings, try setting US or japan, europe/PAL is 50fps at max
check if the roms aren't europe region (it'll be 50 fps at max you'll know immediately)

i'm using Kega fusion version 3.64
here's stuff i found trying to google the issues:

Rightclick KEGA and click Properties, then go to Compatibility. Change the Compatibility Mode to Window XP (servicePack 3)

Some settings to try in the config file:
ForceCompatibleGFX=0
CompatibleGFXOpt=0
EnhancedGFXOpt=0
ForceFullScreen32=1
VistaAeroIgnore=1
VistaNoWndVSync=1
DebugFlags=0,0,2,2

Under options make sure both "High Priority" and "Alternate Timing" are enabled.

On Windows 8.0 and later, an incompatibility issue (related to DirectDraw support in these operating systems being further deprecated) causes the emulator to drop frames or freeze entirely in the case of Windows 10 and later, when attempting to switch to full-screen mode. However, this can be easily fixed by right-clicking on Fusion.exe > Properties > Compatibility > check "Disable Fullscreen Optimizations.

if you want up to date emulators check this site:

Sega Genesis emulators - Emulation General Wiki

emulation.gametechwiki.com

 

[Bonkers225]

Kega hasn't progressed since 2010. That's 15 years ago. In technology terms, people were still using flip phones back then. Your PC has with all the updates. There's bound to be incompatible issues with the program.

 

[JustLooking123]

I'm still using it, and haven't faced any problem so far, except being too fast when i use fast forward!
But i never heard of it being slow...

By the way, which version of it you are using?
I'm using version 3.64.

The only options that i can think that can cause slowdown are these:

• Log AVI File (you shouldn't use this normally)
• V-Sync (try disabling it if it's active)

Also, please open Task manager, and check the percentage of your CPU's activity, both when it's open and when it's closed.
One possibility is that another program is eating up your CPU power.

 

[Deleted member 132407]

You should consider this emulator

Release v0.10.1 · jsgroth/jgenesis

Bugfix release Only one functional change in this release, which fixes a regression introduced in v0.10.0: (SNES) Corrected implementation of how Mode 7 clips scrolled center point coordinates; th...

github.com

 

[Sereness]

................................................... ok so I deleted my entire response... I have no idea what is going on with Kega anymore. For some reason it is working now... kind of...

So uh... Forget it. LOOOOOOOOOOOOOOL

Post automatically merged: Aug 24, 2025

OK now it is having this when I try to fullscreen... a totally new problem now! Yay!

 

[Miles Miles]

................................................... ok so I deleted my entire response... I have no idea what is going on with Kega anymore. For some reason it is working now... kind of...

So uh... Forget it. LOOOOOOOOOOOOOOL

Post automatically merged: Aug 24, 2025

OK now it is having this when I try to fullscreen... a totally new problem now! Yay!

View attachment 103628

Have you tried setting the fullscreen resolution to your monitor's resolution?

 

[Deleted member 132407]

................................................... ok so I deleted my entire response... I have no idea what is going on with Kega anymore. For some reason it is working now... kind of...

So uh... Forget it. LOOOOOOOOOOOOOOL

Post automatically merged: Aug 24, 2025

OK now it is having this when I try to fullscreen... a totally new problem now! Yay!

View attachment 103628

Untick install Bing toolbar

Download DirectX End-User Runtime Web Installer from Official Microsoft Download Center

The Microsoft DirectX® End-User Runtime installs a number of runtime libraries from the legacy DirectX SDK for some games that use D3DX9, D3DX10, D3DX11, XAudio 2.7, XInput 1.3, XACT, and/or Managed DirectX 1.1. Note that this package does not modify the DirectX Runtime installed on your Windows...

www.microsoft.com

 

[Sereness]

Looks like I already have that. Didn't help... my system specs are standard btw. can run most new games blah blah blah. windows 10... not a 3rd world country potato.

 

[Rocket2049]

you can try to check if it's even using your graphics card (like real one, nvidia or whatever)
but you really should consider using an emu that's been updated after 2010 lol

 

[Deleted member 132407]

So uh... I haven't seen this topic touched upon in a fat minute, and google searches don't help.
Anybody happen to know a genuine fix for the slow issues with Kega? I'm no tech wizard, but maybe somebody here could dig around in it and try to figure out why some games play so slow on it on modern systems? I tried playing Pulseman and the game is much slower than it is supposed to be... I also tried playing some gamegear games and those are really slow too. No idea what is causing it, I've tried everything old threads suggest, as well as whatever google spits out at me.... Nothing... *shrug*

Kega Fusion Tutorial | Video Game Emulation for Newbies

Tutorial about the Genesis emulator, Kega Fusion, covering the basics and general troubleshooting.

fantasyanime.com

 

[secreto7 secreto7]

................................................... ok so I deleted my entire response... I have no idea what is going on with Kega anymore. For some reason it is working now... kind of...

So uh... Forget it. LOOOOOOOOOOOOOOL

Post automatically merged: Aug 24, 2025

OK now it is having this when I try to fullscreen... a totally new problem now! Yay!

View attachment 103628

Did you do what Rocket2049 said?

"On Windows 8.0 and later, an incompatibility issue (related to DirectDraw support in these operating systems being further deprecated) causes the emulator to drop frames or freeze entirely in the case of Windows 10 and later, when attempting to switch to full-screen mode. However, this can be easily fixed by right-clicking on Fusion.exe > Properties > Compatibility > check "Disable Fullscreen Optimizations."

 

[Sereness]

didn't work. it seems like the driver somehow axed itself at this point. Which is wierd because I literally haven't touched it.

 

[secreto7 secreto7]

didn't work. it seems like the driver somehow axed itself at this point. Which is wierd because I literally haven't touched it.

If nothing of what was mentioned until now doesn't work, I don't know what could be.

If you don't find what it is, you'll have to choose jgenesis, or genesis-plus-gx or PicoDrive on Retroarch or similar, Bizhawk, Ares, etc.

 

[030079AR]

it's funny, yesterday, I wonder if there is any emulator which easy to use as KEGA, i tried several, but return to KEGA.

 

[diet_orange]

it's funny, yesterday, I wonder if there is any emulator which easy to use as KEGA, i tried several, but return to KEGA.

I did download a nightly build of Blastem the other day. It's fairly decent for what it is tbh, interface kind of feels a bit like MAME. But yeah, have too much nostalgia for Kega and I doubt that I'll ever fully move over

 

[030079AR]

I did download a nightly build of Blastem the other day. It's fairly decent for what it is tbh, interface kind of feels a bit like MAME. But yeah, have too much nostalgia for Kega and I doubt that I'll ever fully move over

i thought im the only one who think blastem is looks like mame, and with quirky ness of old UI/UX of mame, which i'm not fond to. but yea, I think i will stay with KEGA as pretty much standard looks.

 

[secreto7 secreto7]

@diet_orange @030079AR you want an emulator similar to Kega but current?
Just use this one:

GitHub - jsgroth/jgenesis: Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - jsgroth/jgenesis

github.com

 

[030079AR]

@diet_orange @030079AR you want an emulator similar to Kega but current?
Just use this one:

GitHub - jsgroth/jgenesis: Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - jsgroth/jgenesis

github.com

Ah Interesting,
I will check when I wake up later,
got to sleep first for now ( z___z)b

thanks for the info

Post automatically merged: Sep 8, 2025

@diet_orange @030079AR you want an emulator similar to Kega but current?
Just use this one:

GitHub - jsgroth/jgenesis: Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - jsgroth/jgenesis

github.com

the emulator seems nice, however I don't see any shader (crt/tv mode)
but thanks for the info, seems like the emulator also can boot some other platforms.
also I saw mega cd as well, it might be handy, because somehow I cannot boot mega cd in KEGA