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Beetle PSX - PlayStation1 CPU Overclocking!
🕑 Added 2018-02-09 01:57:13 +0000 UTC To continue on from yesterday's story, Super Nintendo CPU overclocking has now been added to all Snes9x libretro ports. Snes9x 2002, 2005, 2010, and mainline all support this new great feature. The only difference is that with 2002 and 2005, it requires a restart, whereas from 2010 onwards it works on-the-fly.Now, onto the big new unveiling today - CPU overclocking for PlayStation1! Simias has added CPU overclocking now to the Beetle/Mednafen PSX emulator.
You should be able to get access to the latest Beetle PSX core by going to Core Updater and updating your Beetle PSX core (both HW and non-HW).
Important to note:
* Beetle PSX previously had an option called 'CPU Overclocking' which was actually erroneously named. A more appropriate name for it would have been GTE Overclocking, or even GTE stall removal. The existing CPU Overclock option will be renamed as 'GTE Overclocking' in light of this.
* Be aware that this all can tend to be rather CPU intensive right now. Beetle PSX is still using only a CPU interpreter core after all. If we want much better performance later on, Beetle PSX will require the use of a dynamic recompiler in order to get big performance gains.
Finally, some tips -
* Try out various combinations of GTE Overclock and CPU Overclock. Be aware that enabling both of these options stresses out your CPU the most, and that in some cases it can pay off to disable GTE Overclock but set CPU Overclock a lot higher. In case you have GTE Overclock on at the same time, you can often achieve similar results to CPU Overclock with GTE Overclock turned off by just setting CPU Overclock to a lower figure.
Other hints -
* Some games require you to set CPU Overclock to 250% in order to attain a locked 60fps. Some games have a builtin framerate limiter and do not allow you to increase the framerate this way.
We have found the following:
- FF8's battle scenes are locked to 15fps, but the field areas are not and can be made to run at 60fps.
- Crash Bandicoot 1 can be made to run at 60fps or 41-ish fps. Be aware that I was not able on my Core i7 7700k right now to get Crash 1 to run at fullspeed at a locked 60fps. We might indeed require a dynamic recompiler here before this becomes practical for most people.
- Soul Blade/Edge seems to max out at 41-ish fps. I don't think going even higher than 500fps would bear much fruit.
- Silent Hill 1 has certain scenes that can be made to run at 60fps, but others will still drop down to a lower figure no matter how high you set CPU Overclock. It is possible a combination of cheat codes and CPU Overclock will be required here in order to get this running at a locked 60fps, just like how it is done on PCSX1. We invite the community to experiment with this.
- Wipeout 1/2097 can be made to run at 60fps by setting CPU overclock to 250%. Try to set GTE Overclock to off at the same time unless you want to increase CPU requirements even more (probably needlessly).
See all the Youtube videos we have made so far -
Wipeout
https://www.youtube.com/watch?v=VBwKydycZZU&t=9s
Soul Blade
https://www.youtube.com/watch?v=JXTRD4hkL_k
Chrono Cross
https://www.youtube.com/watch?v=mHoJcHLtNCk
Jumping Flash
https://www.youtube.com/watch?v=wwP8gKXLcSY
Battle Arena Toshinden 1
https://www.youtube.com/watch?v=NYmScQCgUQc
King's Field
https://www.youtube.com/watch?v=N6i0F5OTEPE
Exhumed / Powerslave
https://www.youtube.com/watch?v=XhcU5ohn8Eg
Silent Hill
https://www.youtube.com/watch?v=Cki0kCGD36Q
Quake II
https://www.youtube.com/watch?v=hW7-3UrUSOU
Doom
https://www.youtube.com/watch?v=jF_iZyD-lQ0
Echo Night
https://www.youtube.com/watch?v=BaSG3Yb1kOE
MDK
https://www.youtube.com/watch?v=jGcL3okIDTk
Duke Nukem - Total Meltdown
https://www.youtube.com/watch?v=lVqxn-nuWn8
Star Wars: Dark Forces
https://www.youtube.com/watch?v=d293Y_Uek3M
Shadow Tower
https://www.youtube.com/watch?v=3SayOf-3zVc
Nightmare Creatures
https://www.youtube.com/watch?v=mk9CVAwrnKw
Loaded
https://www.youtube.com/watch?v=vowodiquYYw
Comments
Awesome! Can we expect a CPU overclock option for the mupen64Plus core sometime in the future?
