Metal Slug 2 slowdown reduction patch

bustedstr8 · Mar 31, 2015

I had a bunch of 27C4096 so I went with those.

Remove J10 and move to J1 if needed. Seems like most boards will have J1 populated all ready.

Use a pull up resistor on the P1 /OE from the bottom of J8,J9 or J10 to the top of JB5 or JB6

Split 941-P1. First 512KB on EP1, Second 512KB on EP2. Burn onto two 27C4002/27C4096 eproms 120ns or faster.

Xian Xi · Mar 31, 2015

Forgot I sold my MS MVS set last year, luckily I found an MS2 mask rom boot. Pulled the p1 and put in the new data and played a game. I would say that the fix made a huge improvement over the original speed. I'd say it's an increase of 60-75%, feels great.

SNKorSWM · Apr 1, 2015

Very nice. Would this be also applicable to fix other games with slowdown like Shock Troopers 2nd Squad?

Razoola · Apr 1, 2015

Its sounds like this fix as well as an 16mhz overclock will allow the game to play very fast on a neogeo.

bustedstr8 · Apr 7, 2015

Me and EG put one together and put a couple hours of play on it. We first credit fed it 2player. It seemed to be doing well until level 3. Pretty much any time after that if we both used HMG and anything more than a couple sprites where on screen it ground to down to a crawl. Overall 2player is just as painful as it ever was.

Now one player is a different story. Almost all the places where the original slowed down the Turbo roms fixed it completely. A good example is the airboats, the turbo roms blast right through them.
It doesn't fix it all, like the final bridge, but the overall pacing an feel for the game is now no longer a grind and is a real joy to play.

Electric Grave · Apr 7, 2015

I'm so grateful, you did it all man, I was just there barely holding a diode straight. I want DZ to play it and experience the changes, he swears by MS2, wait 'till he gets his hands on this version.

Xian Xi · Apr 7, 2015

ElectricGrave said:
I'm so grateful, you did it all man, I was just there barely holding a diode straight. I want DZ to play it and experience the changes, he swears by MS2, wait 'till he gets his hands on this version.

Coming from an MS2 fan, he'll love it.

Electric Grave · Apr 7, 2015

I love MS2 as well, I just haven't played it as much as X and thus I can't truly appreciate the differences in detail as much as someone who has played MS2 to no end.

hungar · Apr 9, 2015

Just wanna say thanks to system 11 this is mine and my boys favourite neo game. Gonna do this on the w/e, very excited

system11 · Apr 9, 2015

Had a long think about the NBH and so on, and I'm afraid I'm happy with the release as it is. It does what it set out to do in the way I wanted.

So, if anyone out there with an AES and a MVS cart wants to use it, you'll need to fix the number yourself before you burn the chip. Get a hex editor, change address 109h from 09 to 02. Job done.

Just converted a mint cart which is my permanent keeper now, having the chance to switch my socketed one back to the normal version showed me the difference is actually greater on MVS than it is in MAME, just wow.

Yagyu Jubei · Apr 9, 2015

HeavyMachineGun said:
It is now time to crack open my Slug 2 carts and give them the engine facelift they so desperately need.

Thank you kind person for taking pity on the rest of us!

Word! I've been waiting for something like this forever. This is awesome!

system11 · Apr 10, 2015

I've had to update this so that it's a patcher instead of just distributing the ROM. Annoyed. Someone suggested it to be helpful elsewhere and it made the question of hosting SNKs code unavoidable. I suppose it takes away the possibility of a takedown notice.

Anyway, I've run through the steps myself on Linux and Windows, it seems to work, would appreciate feedback.

SmokeMonster · Apr 11, 2015

I played MS2 for the first time tonight on my newly built CMVS. Tons of slowdown, but so much fun. You are a god amongst us to have sped it up.

If you ever reconsider letting Raz add a patch to the Unibios, a million of us would be eternally grateful

Razoola · Apr 11, 2015

system11 said:
I've had to update this so that it's a patcher instead of just distributing the ROM. Annoyed. Someone suggested it to be helpful elsewhere and it made the question of hosting SNKs code unavoidable. I suppose it takes away the possibility of a takedown notice.

Anyway, I've run through the steps myself on Linux and Windows, it seems to work, would appreciate feedback.

I could have tried to add it as a cheat into the unibios (if possible) I would have of course given a mention in the readme (link to your url etc) and could have added a custom cheat line message if it fits. That would have got around this situation.

That aside the IPS patcher is the way to go. Does it leave the NGH to the default?

xsq · Apr 11, 2015

Razoola said:
That would have got around this situation.

and spared a couple carts from modding...

not to nitpick, I'm super stoked about this fix. Been playing it on an Emu, it's so nice.

Electric Grave · Apr 11, 2015

My cart is mint from a full kit wit matching serials, I consider this an improvement and well worth doing to the cart itself. Plus I don't have to worry about playing this on boards without the Unibios.

kuze · Apr 11, 2015

system11 said:
I've had to update this so that it's a patcher instead of just distributing the ROM. Annoyed. Someone suggested it to be helpful elsewhere and it made the question of hosting SNKs code unavoidable. I suppose it takes away the possibility of a takedown notice.

Anyway, I've run through the steps myself on Linux and Windows, it seems to work, would appreciate feedback.

I used the patcher today, instead of the ROM you distributed before. Worked perfectly.

I did the socket method; since my Slug 2 had a non-original label, I went ahead and moved my boards into a Chinese shell which didn't require any dremel work for the boards to fit back in.

Just played it for about an hour and am loving it! Thanks for putting this out there for us.

PunkicCyborg · Apr 12, 2015

does JPTCH.exe work with win 7 64 bit?

*edit- never mind figured it out

gtdoering · Apr 12, 2015

Thanks for this! so excited to try this out!

Fakk2 · May 4, 2015

This is really neat, I guess I need to go buy another Metal Slug 2 and find someone to send the new P1 to me.

Thanks OP.

mjsaville · May 4, 2015

Fakk2 said:
This is really neat, I guess I need to go buy another Metal Slug 2 and find someone to send the new P1 to me. Thanks OP.

Plz PM me if you find someone to do a patched P1 chip. I too would love a faster MS2 but cannot justify buying a Eprom programmer just for 1 chip.

nam9 · May 4, 2015

mjsaville said:
Plz PM me if you find someone to do a patched P1 chip. I too would love a faster MS2 but cannot justify buying a Eprom programmer just for 1 chip.

I'm in on this bandwagon too...

aha2940 · May 4, 2015

nam9 said:
I'm in on this bandwagon too...

Send Fox1 a PM. I can help too, but since I'm located in South America, shipping costs may be too much.

NeoCverA · May 4, 2015

Last Resort?

Yagyu Jubei · May 4, 2015

mjsaville said:
Plz PM me if you find someone to do a patched P1 chip. I too would love a faster MS2 but cannot justify buying a Eprom programmer just for 1 chip.

Add me to that list too. Por favor...

Metal Slug 2 slowdown reduction patch

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