Change core clock from 59.18 hz to 60 hz

joseupp · Unread post by **joseupp** » Sun Oct 25, 2020 2:25 pm

Hello
I want to change the clock of the neo geo system from the current 59.18 hz to 60 hz, I have downloaded quartus and the files to compile the core but I do not know what parameter the clock changes.

The problem I have is that the tv where it is connected mister is not able to synchronize with the pixel clock of neo geo and you get a scroll stutter every x seconds, and I tried all the vsync options and it is the same in all.

If someone is so kind to indicate me and apologize for my English, thanks in advance.

paulbnl · Unread post by **paulbnl** » Mon Oct 26, 2020 12:31 pm

At Project Navigator at top left select IP Components.
Right click Entity "pll" -> Edit in parameter editor.

There you see Desired Frequency 96.0 & 48.0 Mhz. For 60Hz you need 60/59.18 x 96Mhz = 97.330180 and 48.665090. Enter those both at Desired Frequency and then make sure Actual Frequency matches exactly. Finally click Finish.

retrorepair · Unread post by **retrorepair** » Mon Oct 26, 2020 1:11 pm

Just to add to this, I'm not sure it will help you. 59.18 isn't an unusual frequency for 15khz capable displays so I'd be more inclined to believe you have other issues.

Do any other cores work on this display? What is it?

joseupp · Unread post by **joseupp** » Mon Oct 26, 2020 7:39 pm

paulbnl wrote: ↑Mon Oct 26, 2020 12:31 pm At Project Navigator at top left select IP Components.
Right click Entity "pll" -> Edit in parameter editor.

There you see Desired Frequency 96.0 & 48.0 Mhz. For 60Hz you need 60/59.18 x 96Mhz = 97.330180 and 48.665090. Enter those both at Desired Frequency and then make sure Actual Frequency matches exactly. Finally click Finish.

Thank you very much, it works perfect, now I have smooth scrolling without stuttering. Again, thank you very much

Insert Disk Two · Sat Dec 05, 2020 1:53 pm

Can you please share the compiled core? I also have the same stuttering problem on my TV. Thanks!

joseupp · Unread post by **joseupp** » Sat Dec 05, 2020 2:27 pm

Insert Disk Two wrote: ↑Sat Dec 05, 2020 1:53 pm Can you please share the compiled core? I also have the same stuttering problem on my TV. Thanks!

Hi

https://mega.nz/file/BFJUXRIS#ANTV25gld ... zLK3heeaZs

Insert Disk Two · Sat Dec 05, 2020 2:57 pm

That's awesome, thank you so much!

Do you plan to keep it updated in the future?

joseupp · Unread post by **joseupp** » Sat Dec 05, 2020 3:45 pm

Insert Disk Two wrote: ↑Sat Dec 05, 2020 2:57 pm That's awesome, thank you so much!

Do you plan to keep it updated in the future?

Yes

Insert Disk Two · Sat Dec 05, 2020 6:41 pm

Great

Insert Disk Two · Thu Jan 14, 2021 8:17 pm

Neogeo core got updated today. Anyone got a 60hz corrected version of it please? Thanks.

joseupp · Unread post by **joseupp** » Fri Jan 15, 2021 7:43 pm

Insert Disk Two wrote: ↑Thu Jan 14, 2021 8:17 pm Neogeo core got updated today. Anyone got a 60hz corrected version of it please? Thanks.

Update 60hz
https://mega.nz/file/JIp0yQoZ#VvSgmo_Q2 ... eAaAV6RLWw

MostroW · Unread post by **MostroW** » Sat Jan 16, 2021 11:20 am

Maybe ask the developer to make it an switchable option in the MiSTer OSD?

Insert Disk Two · Sat Jan 16, 2021 6:46 pm

Updates on Neogeo are done by Sorgelig himself and he does not want to include this option.

MostroW · Unread post by **MostroW** » Sun Jan 17, 2021 11:31 am

Ahhh ok, if he doesn't want to include that change i'd say there must be a perfectly good reason for that?
Then it's left to people themselves to recompile their custom core i guess.

Insert Disk Two · Sun Jan 17, 2021 9:11 pm

Well when I asked him if he could implement it I was told "to buy a good TV"

Unfortunately it doesn't really have to do with a TV being good or not. So at least they are people out there who are doing it themselves. Pity this has to be done manually with every release

Insert Disk Two · Thu Feb 04, 2021 11:11 am

Any chance this can be patched for 60hz. This is a custom core with cropping.

http://temlib.org/pub/mister/crop/

Insert Disk Two · Thu Feb 11, 2021 10:42 am

Official NeoGeo core with 1080p crop is out. Looking forward for a 60hz patched version

joseupp · Unread post by **joseupp** » Sat Feb 13, 2021 12:12 am

Insert Disk Two wrote: ↑Thu Feb 11, 2021 10:42 am Official NeoGeo core with 1080p crop is out. Looking forward for a 60hz patched version

Update 60hz
https://mega.nz/file/wRwEgAxC#c99a8LP5Z ... NR0eWhs-Ug

Insert Disk Two · Thu Feb 18, 2021 6:33 am

Thanks for the awesome work, I do hope that at one point Sorgelig implements the option within the official core.

uberyoji · Unread post by **uberyoji** » Sun Feb 21, 2021 10:28 pm

I wish this option was included as well. 60hz fixes my wavy picture.
Also I wonder why Sorgelig says to buy a good tv. I have a Sony KV32FV310, I don't think it is bad lol.
There is an option like this on the cave core and it works great.
Thanks for the update joseupp.

Insert Disk Two · Mon Feb 22, 2021 6:34 pm

Meanwhile there is another Neo Geo official core update :/ This cat and mouse game will never end

uberyoji · Unread post by **uberyoji** » Mon Feb 22, 2021 7:54 pm

Maybe joseupp will update us again.

Now if only jotego would add the option with the cps system. I see from his jtbin github that he is aware of the 60hz issue. Even had a twitter poll about it.

Insert Disk Two · Mon Feb 22, 2021 9:12 pm

Yes, I have talked to him about 60hz and he decided to do a poll about it

glenfiay · Unread post by **glenfiay** » Tue Feb 23, 2021 8:57 pm

I haven't had any issue on PVM and BVM but I know some CRT such as Barco CRTs have synch issues with Neogeo MiSTer or legit Neogeo hardware

uberyoji · Unread post by **uberyoji** » Tue Feb 23, 2021 11:15 pm

joseupp wrote: ↑Sat Feb 13, 2021 12:12 am
Insert Disk Two wrote: ↑Thu Feb 11, 2021 10:42 am Official NeoGeo core with 1080p crop is out. Looking forward for a 60hz patched version
Update 60hz
https://mega.nz/file/wRwEgAxC#c99a8LP5Z ... NR0eWhs-Ug

joseupp, do you think you could update us? Otherwise I might try to setup myself and provide an update on a regular basis.
If anyone has pointers to get me running up fast, please let me know. I will start by looking at the official GitHub page.

MiSTer FPGA Forum

Change core clock from 59.18 hz to 60 hz

Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz

Re: Change core clock from 59.18 hz to 60 hz