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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    Slowdown on PS1 games

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    ps1slow down
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    • KaK
      Ka @dankcushions
      last edited by

      @dankcushions Thanks. Shaders are off. Please see below for log:

      https://pastebin.com/4WWN74w5

      1 Reply Last reply Reply Quote 0
      • KaK
        Ka @ClassicGMR
        last edited by

        @ClassicGMR Thanks. I've made sure the bios files are all named according to the documentation, and that all the listed bios files are in the RetroPie/bios folder.

        Would it make a difference if there are any other bios files there? I seem to have quite a few for some reason.

        1 Reply Last reply Reply Quote 0
        • dankcushionsD
          dankcushions Global Moderator
          last edited by

          thanks - that looks good to me - you're hardly dropping frames:

          [INFO] Threaded video stats: Frames pushed: 19121, Frames dropped: 3.

          secondly, please upload /opt/retropie/configs/all/retroarch-core-options.cfg

          KaK 1 Reply Last reply Reply Quote 0
          • KaK
            Ka @dankcushions
            last edited by

            @dankcushions Will do. Removing the shader didn't seem to improve things in terms of slowdown, and neither did making sure the bios names matched the documentation unfortunately. I'll add the .cfg file when I get a moment.

            dankcushionsD 1 Reply Last reply Reply Quote 0
            • dankcushionsD
              dankcushions Global Moderator @Ka
              last edited by

              @Ka i suspect this will turn out to be an emulation bug that is only fixed by using interpreter rather than dynarec, or just a better PSX emulator (pcsx rearmed isn't perfect). I get similar pacing bugs with tekken 3 - the speed is ever so slightly off at times, but i wouldn't notice it if i wasn't very familiar with that game. racing games are probably more obvious due to their nature.

              KaK 1 Reply Last reply Reply Quote 0
              • KaK
                Ka @dankcushions
                last edited by

                @dankcushions Cheers, here you go: https://pastebin.com/8TAj5RSX

                It makes sense that it's more obvious in racing games, and yeah, I've played shedloads of Wipeout and Gran Turismo, so it probably seems more obvious to me that something is off.

                That said, the slowdown on GT2 and Rage Racer is quite significant - I'd say RR isn't really playable on my setup, it's really noticeably slowing down. But yeah, you'd definitely notice it more in RR than in, say, Tomb Raider.

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                • windgW
                  windg
                  last edited by

                  If you can, try the PAL version of Gran Turismo 2 and a lower resolution from raspi-config (1280x720) .

                  My English isn't at a good level.

                  KaK 1 Reply Last reply Reply Quote 0
                  • KaK
                    Ka @windg
                    last edited by

                    @windg I don't have access to the PAL version of GT2 unfortunately, but I did try running the game at 1280x720, and the slowdown was still present - the in-game timer was about thirty seconds behind the stopwatch after a three minute race.

                    Presumably it's not down to the game overtaxing the Pi, then...

                    dankcushionsD 1 Reply Last reply Reply Quote 0
                    • dankcushionsD
                      dankcushions Global Moderator @Ka
                      last edited by

                      @Ka one thing you could try is raising
                      the CPU speed core option. there’s some info on this here: https://retropie.org.uk/docs/Playstation-1/#performance-psx-cpu-clock

                      KaK 2 Replies Last reply Reply Quote 1
                      • KaK
                        Ka @dankcushions
                        last edited by Ka

                        @dankcushions Thanks - will give that a shot. Daft question from me - should I be raising that figure or lowering it? What does that figure actually do? Presumably I can fiddle around with it in-game without breaking anything.

                        The documentation says "The clock speed percentage of the emulated PSX hardware's CPU can be adjusted by the user" through this option, and that the default is 57.

                        That sounds like the emulator defaults to 57% speed of the emulated PSX CPU - is that right? It sounds odd to me. Were PSX CPUs underclocked?

                        dankcushionsD 1 Reply Last reply Reply Quote 0
                        • dankcushionsD
                          dankcushions Global Moderator @Ka
                          last edited by

                          @Ka raising, like i said :) i don’t know where the 57 figure comes from or the logic behind it, but that is the figure that seems to be most compatible across all games. if you set it to 100 you’ll get issues i expect, so be sure to set the config per-game as per the link.

                          KaK DarksaviorD 2 Replies Last reply Reply Quote 3
                          • KaK
                            Ka @dankcushions
                            last edited by

                            @dankcushions OK, cool - much appreciated. I'll give that a try.

                            1 Reply Last reply Reply Quote 0
                            • KaK
                              Ka @dankcushions
                              last edited by Ka

                              @dankcushions said in Slowdown on PS1 games:

                              @Ka one thing you could try is raising
                              the CPU speed core option. there’s some info on this here: https://retropie.org.uk/docs/Playstation-1/#performance-psx-cpu-clock

                              This was a really good call, as it made a HUGE diffference. Wipeout and Rage Racer appear to run at full speed with the CPU clock jacked up to about 70. I pushed it up to 95 at one point, with no apparent ill effects - my trusty stopwatch seemed to indicate that the game was running at the right speed and wasn’t going too fast, and there was no slowdown that I could see.

                              With Gran Turismo 2, even at 95% there was a tiny bit of slowdown - about two or three seconds over the course of a three minute race, but I couldn’t honestly say that this wasn’t present on original hardware and it’s hard to see how you would notice when actually playing the game and not scrutinising it for speed drops.

                              So thanks - I can finally play those games properly again!

                              1 Reply Last reply Reply Quote 2
                              • windgW
                                windg
                                last edited by windg

                                I have complete GT2 and i didn't understand that was slow(my bad), until i set the CPU to 95. Now is running smoother and better. Nice discovery Ka, thanks! Thanks dankcushions too for the suggestion, i will try it with others games that looks slow.

                                My English isn't at a good level.

                                1 Reply Last reply Reply Quote 0
                                • SgtJimmyRustlesS
                                  SgtJimmyRustles @Rion
                                  last edited by

                                  @Rion Question, what special about that bios?

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                                  Hop on the Dicscord as well and chat about all things Retropie (or recalbox, lakka, etc)
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                                  RionR 1 Reply Last reply Reply Quote 0
                                  • DarksaviorD
                                    Darksavior @dankcushions
                                    last edited by

                                    @dankcushions Have you guys considered putting PSX Beetle in the experimental section for the pi4? It's usable, when overclocked (because the dynarec is too unstable), on protected 2d games that Rearmed can't run.

                                    1 Reply Last reply Reply Quote 1
                                    • RionR
                                      Rion @SgtJimmyRustles
                                      last edited by

                                      @SgtJimmyRustles said in Slowdown on PS1 games:

                                      @Rion Question, what special about that bios?

                                      psxonpsp660.bin is a BIOS dumped from the PSP's PlayStation emulator. It is said to improve performance for certain PlayStation games as is a streamlined version of the BIOS, lacking irrelevant features like the built-in CD Player and Memory Card manager.

                                      FBNeo rom filtering
                                      Mame2003 Arcade Bezels
                                      Fba Arcade Bezels
                                      Fba NeoGeo Bezels

                                      DarksaviorD 1 Reply Last reply Reply Quote 0
                                      • DarksaviorD
                                        Darksavior @Rion
                                        last edited by

                                        @Rion Is there any evidence to that? I tried it in psx beetle and gained zero fps.

                                        RionR 1 Reply Last reply Reply Quote 0
                                        • RionR
                                          Rion @Darksavior
                                          last edited by

                                          @Darksavior PSX BIOS from PSP 6.60 optimised to play games more smoothly: but how?

                                          FBNeo rom filtering
                                          Mame2003 Arcade Bezels
                                          Fba Arcade Bezels
                                          Fba NeoGeo Bezels

                                          DarksaviorD 1 Reply Last reply Reply Quote 0
                                          • DarksaviorD
                                            Darksavior @Rion
                                            last edited by

                                            @Rion I would've liked video evidence, but o well. I don't see it.

                                            1 Reply Last reply Reply Quote 0
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