Neo Geo CPU Overclocking?

[Akuma]

Ahh... there we go

[Koston]

What needs to be fixed about it? The core meets timing requirements when I compile trbocode's latest version.

I don't think doubling the clock is anywhere near the equivalent of what Koston's mods to his own boards are though. The current build is like clocking the board to 24MHz which is a bit excessive given 12MHz is the default.

In my tests, 18MHz is the highest CPU frequency a NeoGeo PCB can run Metal Slug games at. IIRC, the CPU is spec'd to run at up to 24MHz, so there's no heating or other potential problems usually associated with overclocking.

Overclocking reduces slowdown without adverse effects in all Metal Slug series games, MS2 is just the one getting most benefit since original is simply unplayable.

[MrsBison]

Hey

I placed the patched oc 24 MHz rbf in the folder console.
How do i select this core please ?

Edit: Working. Wow MS 2 runs so good now.
Just some slowdowns but really great to play.

Can we have a similar fix for Last Resort and Blazing Star?

Thanx

[Theenemy]

now we have cd support in the main core and probably some other changes, is it possible to get an updated 18mhz and 24mhz patched version?

[Atohmdiy]

now we have cd support in the main core and probably some other changes, is it possible to get an updated 18mhz and 24mhz patched version?

I wanted to come here to ask the same, as i stated the old version now crash.

[MrsBison]

There are lots of games which would have a big benefit for a separate single core update.
If i compare most of shmups running in the Neo Burn Alpha... i think there is room for improvement ... BUT

I dont think they wanna built 156 single cores ...

So maybe someday will be a modified core for most games but compared to Neo Burn Alpha the games which runs perfect on
Mister runs almost like on real hardware. Thats the biggest benefit for gaming an a flawless hardware

kind regards

[MrsBison]

Just some thoughs....

Well most of us tried these special OC Core for Metal Slug and it really worked great. Even on Part 2....
Is it possible to create a similar version for Viewpoint, Last Resort and Twinkle Start Spites ?

I think especially these shmups would be so awesome without slowdowns...
( I know that most slowdowns are exaclty like on the real hardware )

Cheers

[Lloyd2084]

Shocktroopers 2 would benefit hugely from overclocking. Great game but it becomes a slideshow in 2p modes

[MrsBison]

Today i tried Shock Troopers... For me its no playable with stock CPU.
I tried the OC 24mHz but this causes big grafik glitches.
Is there a way to play both games smooth ?

Kind regards

[MrsBison]

Hi there

today ive played MS 1 with the overcloked core. Runs superb but after hitting the buttons for entering the
softdip menu ( enable red blood and so on ) i got this issue.

1000017598.jpg (2.88 MiB) Viewed 11250 times

[FPGA64]

Overclocked Neo Geo can suffer graphical corruption. The machine is not built to run that fast and so is unstable

[MrsBison]

If you dont hit that menu it runs perfect till the end... was just an accidentally trigger issue

[Phaedrus]

Hi.

Here is the 24MHz patched neo-geo core up to date.

Any chance of getting an updated version that works with the recent neo geo cd core?

This version loads the core, but doesn't actually let you load roms.

[Theenemy]

Correct .. just an overclocked version of latest core would be great

[Koston]

Overclocked Neo Geo can suffer graphical corruption. The machine is not built to run that fast and so is unstable

Could you please cease spreading FUD?

UniBIOS 4.0 has been explicitly patched to support an overclocked NeoGeo.

[FPGA64]

Overclocked Neo Geo can suffer graphical corruption. The machine is not built to run that fast and so is unstable

Could you please cease spreading FUD?

UniBIOS 4.0 has been explicitly patched to support an overclocked NeoGeo.

Well as can be seen by this thread the Current Overclocked core has caused graphical corruption. Therefore is not FUD. Believe what you wish.

[Koston]

Overclocked Neo Geo can suffer graphical corruption. The machine is not built to run that fast and so is unstable

Could you please cease spreading FUD?

UniBIOS 4.0 has been explicitly patched to support an overclocked NeoGeo.

Well as can be seen by this thread the Current Overclocked core has caused graphical corruption. Therefore is not FUD. Believe what you wish.

If you don't want to help users with problems, you could at least refrain from spreading misinformation. So, let's reiterate. Again.

NeoGeo machine running at 16MHz or 18MHz is perfectly stable. NeoGeo software running at 16MHz or 18MHz is generally NOT stable (explanation of technical reason omitted for brevity). Metal Slug games are the exception, they benefit from an overclocked NeoGeo.

To sum it up:

1) Use overclocked core only to play Metal Slug games
2) Don't listen to FPGA64 on this topic

[Atohmdiy]

Could you please cease spreading FUD?

UniBIOS 4.0 has been explicitly patched to support an overclocked NeoGeo.

Well as can be seen by this thread the Current Overclocked core has caused graphical corruption. Therefore is not FUD. Believe what you wish.

If you don't want to help users with problems, you could at least refrain from spreading misinformation. So, let's reiterate. Again.

NeoGeo machine running at 16MHz or 18MHz is perfectly stable. NeoGeo software running at 16MHz or 18MHz is generally NOT stable (explanation of technical reason omitted for brevity). Metal Slug games are the exception, they benefit from an overclocked NeoGeo.

To sum it up:

1) Use overclocked core only to play Metal Slug games
2) Don't listen to FPGA64 on this topic

It's funny that we've got a turbo / OC version for a lot of core now but still not for the neo geo, even the M92 have it and it's a wounderfull feature. I heard the analog pocket will get a turbo option for the neo geo soon if it's not already done.

[FPGA64]

Could you please cease spreading FUD?

UniBIOS 4.0 has been explicitly patched to support an overclocked NeoGeo.

Well as can be seen by this thread the Current Overclocked core has caused graphical corruption. Therefore is not FUD. Believe what you wish.

If you don't want to help users with problems, you could at least refrain from spreading misinformation. So, let's reiterate. Again.

NeoGeo machine running at 16MHz or 18MHz is perfectly stable. NeoGeo software running at 16MHz or 18MHz is generally NOT stable (explanation of technical reason omitted for brevity). Metal Slug games are the exception, they benefit from an overclocked NeoGeo.

To sum it up:

1) Use overclocked core only to play Metal Slug games
2) Don't listen to FPGA64 on this topic

So you even state it yourself. It is not stable
So
1) The overclocked option isnt stable
2) Dont Listen to Koston on this Topic

[Koston]

It's funny that we've got a turbo / OC version for a lot of core now but still not for the neo geo, even the M92 have it and it's a wounderfull feature. I heard the analog pocket will get a turbo option for the neo geo soon if it's not already done.

Altering the CPU clock speed alone is only useful for Metal Slug games (somehow unacceptable concept).

To more properly implement overclocking, would need to change all timings to match the CPU. So eg. copying sprite data to video RAM would be done in the same number of CPU cycles, to avoid garbled graphics.

But that also is a far cry from actually guaranteeing all games to work overclocked, and is strictly a software-only modification.

[Atohmdiy]

It's funny that we've got a turbo / OC version for a lot of core now but still not for the neo geo, even the M92 have it and it's a wounderfull feature. I heard the analog pocket will get a turbo option for the neo geo soon if it's not already done.

Altering the CPU clock speed alone is only useful for Metal Slug games (somehow unacceptable concept).

To more properly implement overclocking, would need to change all timings to match the CPU. So eg. copying sprite data to video RAM would be done in the same number of CPU cycles, to avoid garbled graphics.

But that also is a far cry from actually guaranteeing all games to work overclocked, and is strictly a software-only modification.

That's why i don't listen this FPA64 fella, i don't care much for the technical details i don't understand. I just know cpu OC work perfectly for metal slugs, that's all i want. I don't care really if the core is considered stable or unstable or whatever, i know it's perfectly fine and fully playable with metal slugs.

[Neocaron]

FPGA64 and overclocking just don't vibe together. He has some interesting knowledge on many topics, but when it comes to overclocking, it's like he's living in a comic book world there is only black or white, good or evil. XD
The Neo Geo can be pushed to its limits pretty often and to a level that is not really fun for games based on timing. So the OC here is really important to even enjoy some of these games. And sure you have PC emulation, but it wouldn't be as good in term of latency, + it's an easy plug and play in my CRT (I guess with Groovy the last argument doesn't really work any more, but the first one does )

[Theenemy]

think i posted back in february but is it possible for a seperate overclocked core for mister similar to the overclocked core we get on analogue pocket?