Posted: 8/1/2016 7:49 AM
Post subject: Core Overclocking
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OmegaFlareX
Joined: 7/20/2004
Posts: 108
I'd like to request being able to overclock an emulation core's CPU for the (possible) elimination of slowdown. MagicEngine had this feature, and it made some games like the Gradius port infinitely more enjoyable. Certain MAME derivatives also can do this for slowdown-plagued games like AC Double Dragon. I know it goes against the whole accuracy thing and can really mess up certain games, but I think it would be a fun feature to have for casual play.
Posted: 8/1/2016 2:44 PM
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feos
Site Admin, Skilled player (1236)
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NES TAS of 2011
What system?
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 8/1/2016 4:02 PM
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Weatherton
Experienced player (601)
Joined: 10/23/2004
Posts: 706
N64 TASer of 2016 TAS of 2016 First edition TAS of 2016 N64 TAS of 2016
I would like to echo this request for an overclocking option, but for N64 core. This functionality is available in a special 1964 build and the results for some games is amazing (e.g. Goldeneye and Perfect Dark play at 60fps consistently). The build I'm referring to is available at: http://www.emucr.com/2011/02/1964-ultrafast-v3.html
Current Project: - Mario Kart 64
Posted: 8/1/2016 4:22 PM
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feos
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NES TAS of 2011
I doubt it makes sense to overclock cores that are ported. It must be done by their devs and then adopted (unless someone already has a patch).
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 8/1/2016 7:59 PM
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OmegaFlareX
Joined: 7/20/2004
Posts: 108
In that case, NES and PCE. SMS/GG would be cool too if it's not that much work, but I'm not as much of a fan of that system.
Posted: 8/1/2016 8:04 PM
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feos
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NES TAS of 2011
OmegaFlareX wrote:
NES
http://www.fceux.com/web/pressrelease-2.2.3.html
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 8/1/2016 8:28 PM
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Weatherton
Experienced player (601)
Joined: 10/23/2004
Posts: 706
N64 TASer of 2016 TAS of 2016 First edition TAS of 2016 N64 TAS of 2016
It seems this has been done using the standard Mupen64Plus core through RetroArch: https://retropie.org.uk/forum/topic/140/how-to-use-overclock-and-mupen-core-options-to-significantly-increase-64-game-playability-quality-and-stability
Current Project: - Mario Kart 64
Posted: 8/3/2016 2:07 PM
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OmegaFlareX
Joined: 7/20/2004
Posts: 108
feos wrote:
OmegaFlareX wrote:
NES
http://www.fceux.com/web/pressrelease-2.2.3.html
And MagicEngine does PCE. That's nice, but the reason I use BizHawk is its all-in-one solution with a good UI. So my answer is "no" then. Bummer.
Posted: 8/3/2016 2:11 PM
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feos
Site Admin, Skilled player (1236)
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NES TAS of 2011
OmegaFlareX wrote:
Bummer.
What is that supposed to mean?
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 8/3/2016 4:12 PM
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creaothceann
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http://www.urbandictionary.com/define.php?term=bummer
Posted: 8/3/2016 5:44 PM
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Alyosha
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OmegaFlareX wrote:
In that case, NES and PCE. SMS/GG would be cool too if it's not that much work, but I'm not as much of a fan of that system.
NESHawk's architecture currently has CPU emulation tied in very closely with sound emulation, necessary for recent accuracy improvements . It would be trivial to overclock the whole thing but that would correspondingly speed up sound. I'm not sure I can seperate out the sound without creating spaghetti, so yeah fceux 2.2.3 is probably your best bet for NES.
Posted: 8/3/2016 8:03 PM
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feos
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NES TAS of 2011
Alyosha wrote:
It would be trivial to overclock the whole thing but that would correspondingly speed up sound. I'm not sure I can seperate out the sound without creating spaghetti, so yeah fceux 2.2.3 is probably your best bet for NES.
You should stop sample generation on extra scanlines (overclocking is done by adding dummy scanlines like in dendy), and cancel overclocking for 7-bit samples. That way sound won't speed up. 1-bit sample DMA is also disabled during dummy scanlines. Dendy has sound entirely enabled, that's why its frame lasts longer. We can only disable sound and force the regular framerate in emulation, so it's basically a hack. And some games want extra scanlines be to added to vblank instead of post-render.
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 1/20/2017 1:26 AM
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Koh1fds
Player (170)
Joined: 7/1/2016
Posts: 263
There is no hope of getting nes overclocking in NESHawk by extra scanlines?
Posted: 1/20/2017 12:58 PM
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Alyosha
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Koh1fds wrote:
There is no hope of getting nes overclocking in NESHawk by extra scanlines?
Maybe sometime in the future, but it's not high on my priority list right now, sorry.