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Lizard1977

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#249431 10-May-2019 12:47
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After watching several retro gaming videos on Youtube I was inspired to have another crack at RetroPie, to get some Amiga games up and running.  I dug out an old Raspberry Pi 2 I had laying around, and after some trial and error have got most of my games running reasonably well.  However one, Kid Chaos, runs visibly slower than all the other games.  I can tell this, because there is a time counter in the game, and five seconds on that counter equals 9 seconds in the real world, so about half as fast as it should be.  The game is a riff on the Sonic the Hedgehog style of platformer, so speed is a crucial aspect of the game.

 

I've been trying to work out whether its the configuration I've been using, or the hardware.  I have the game in both .lha and .adf format, and I've tried both Amiberry and UAE4ARM, but it's the same in both.  I also tried the .adf format on WinUAE on a full PC, and that ran at the proper speed, which got me to thinking that maybe the Raspberry Pi 2 isn't fast enough to fully emulate the game.

 

But that's a bit odd, as the game was coded to run on an A500 OCS machine, and the Amiberry emulator on the Raspberry Pi 2 can emulate everything including the A1200 and the CD32.  Using the A500 config on WinUAE and the .adf files plays fine on my PC, but the same config on the Pi 2 plays slow.  So maybe it is the Pi 2 hardware?

 

It's probably too niche a question for GZ, but does anyone have any experience emulating Amiga games on the Pi 2 or 3 who can comment on whether the newer hardware might be the solution.  It would be a shame to have to buy a new Pi just for one game, when everything else seems to play just fine.


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xpd

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  #2234458 10-May-2019 13:21
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Could be the parallax scrolling is a bit taxing on the emulation. Ive got a Pi3 at home, will give Kid Chaos a try if I remember :)

 

 





       Gavin / xpd / FastRaccoon

 

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Lizard1977

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  #2234464 10-May-2019 13:33
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Thanks @xpd.  I'm still wrapping my head around the different configurations.  Some of the suggestions on the RetroPie forums (for other games) was to try different resolutions.  I've tinkered with this but I may not be doing it right.


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  #2235566 12-May-2019 19:27
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WHich version of the game were you using, and chipset etc ?

 

 





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  #2235569 12-May-2019 19:40
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For some reason Amiberry refuses to play ball with me...... just get blank screen after selecting start regardless what chipset/ROM I select.... will get Ambian installed and give that a shot.

 

 





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  #2235614 12-May-2019 21:28
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I've used every combination I can think of, but I've focussed on the OCS version of the game (for the A500), using the .lha package of game files (WHDLoad).  The config in Amiberry for the A500 is using a Kick1.3 ROM (rev 34.5), 68000 chip at 7Mhz, 512K chip and 512K slow RAM - i.e. the basic A500 config.  I've also experimented with the A1200 config (Kick 3.1 rev.40.68 A1200 version, 68020 chip at 14Mhz, AGA chipset, 2MB chip and 512K slow RAM).  And for good measure, I tried creating a CD32 config and running the CD32 version of Kid Chaos, but that was no different.


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  #2235728 13-May-2019 07:50
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Hmm OK, Im throwing on RetroPi today, and will try that tonight. I've got a couple of different versions of Kid Chaos in my archives, as well as the CD32 one, so will try them all and see if any difference :)

 

 





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  #2243127 22-May-2019 13:59
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@xpd - any luck with RetroPi and Kid Chaos?


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