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Old 02-17-2007, 03:10 AM   #1
SamIAm
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Default What's the deal with all the emulation on PSP?

OK, so I'm not asking about how to get emulators to run on a PSP. I sort of understand that anyway, and I don't really care about that right now. What I don't get is, why the heck are there all these emulators being made for the PSP for systems that seem like they shouldn't be emulate-able on the PSP? I've never even held a PSP, so I have no idea how these things actually run. But how is it that an N64 emulator is running on this thing at close to full speed? Why is there such a supposedly good PSX emulator on it? Does it have a PSX CPU inside of it like the PS2? And is this boob who is talking about doing a Saturn emulator for it totally off his rocker, or what? I mean, according to the spec lists, this thing only has a 333MHz CPU!

I've been doing emulation for years now, and all of this goes against the basic principles I had picked up about the constraints on emulators. Are these emulators compromised somehow? Is there something magical about the PSP? Seriously, what's the deal?
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Old 02-17-2007, 03:22 AM   #2
puzzl
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Default Re: What's the deal with all the emulation on PSP?

I cant answer all of your questions, but regarding PSX on PSP, I can say that it does not have dedicated PSX hardware inside of it. All software. And it's not a "supposedly good" PSX emulator, it is a fantastic PSX emulator. I play my own dumped copy of Chrono Cross on it at full speed with no slowdowns. The reason why the emulator is so good is probably because it was coded by sony themselves, and they have full access to the hardware (kinda like the genesis emulator SEGA made for the Dreamcast). The homebrew community simply made it so that any PSX game dumped properly can run on it and not just those released by Sony (Again, much like the official SEGA genesis emu for the Dreamcast).

Also, N64 emulation is nowhere near fullspeed. Last i heard, they were at maybe 15FPS max on one or two games, and that's with a lot of glitches and no sound.

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Old 02-17-2007, 05:11 AM   #3
SamIAm
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Default Re: What's the deal with all the emulation on PSP?

yeah, that's pretty much what I've heard about the PSX emulator. Still, though, in contrast to the Genesis emulator for the Dreamcast, we are talking about a phenomenal achievement. The Genesis has only a fraction of the power of the PSX, yet the Dreamcast is only a step or two behind the PSP in the same area. Could it be that there is similar enough hardware between the PSP and the PSX that this emulation is not as hard as it would seem?

And although I don't have the link handy, I do remember reading an N64 emu-dev saying he had 40 fps. No comment on the method or quality, though.
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Old 02-17-2007, 02:29 PM   #4
AuroEdge
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Default Re: What's the deal with all the emulation on PSP?

The fact that the PSP has a processor capable of 333MHz does not mean that it is equal to say a Pentium 333MHz CPU. It has a MIPS R4000 processor. You're logic is that since the N64 had about 90MHz of power that it should only have graphics as good as any other system with a 90MHz processor. Very wrong. Next, you want to know why the PSP is capable of emulating N64 near full speed? For one, Daedalus or however it is spelled is not full speed but still very fast for the stage it is at. The N64 and PSP share a similar CPU architecture. The N64 had a 93.75MHz R4300 processor. So, you can see where I'm going with this.
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Old 02-17-2007, 09:31 PM   #5
SamIAm
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Default Re: What's the deal with all the emulation on PSP?

I am plenty aware of the differences in power between CPU types. I was merely assuming that the 333MHz CPU in the PSP was not capable of as much raw calculating as, say, the 1.5GHz CPU that pSX really likes to have to run on a PC.

I believe I asked in my last post about whether it could be that the systems have similar hardware, and the answer appears to be yes for both the PSX and the N64. I didn't know all 3 CPUs were part of the same close family. In that case, these results are kind of like how it was so easy to get a Saturn emulator to boot on a Dreamcast - the Dreamcast's SH4 is a very direct descendant of the Saturn's SH2s.

And on that note, I'll go ahead and assume that Saturn emulation on the PSP is still not really feasible.
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Old 02-18-2007, 07:07 AM   #6
icenine0
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Default Re: What's the deal with all the emulation on PSP?



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Old 02-18-2007, 11:52 PM   #7
Ernst
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Default Re: What's the deal with all the emulation on PSP?

> I was merely assuming that the 333MHz CPU in the PSP
> was not capable of as much raw calculating as, say, the
> 1.5GHz CPU that pSX really likes to have to run on a PC.

I have without problem run psx emulation on a 366mhz celeron clocked to 450 at full speed.
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Old 02-19-2007, 04:38 AM   #8
juggaleaux
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Default Re: What's the deal with all the emulation on PSP?

No Saturn emulation.

N64 is 20-40 fps (depending on the game of course) with sound when the Daedalus R9 emu comes out, which should be any time in the next week or so.



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Old 02-19-2007, 05:05 AM   #9
Kitsune Sniper
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Default Re: What's the deal with all the emulation on PSP?

> ... The reason why the emulator is so good is
> probably because it was coded by sony themselves, and they
> have full access to the hardware (kinda like the genesis
> emulator SEGA made for the Dreamcast).

Except the Genesis emulator SEGA used was not coded by them. And it's prone to slowdowns and it has horrible, horrible audio issues that literally make the games unplayable.
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Old 02-19-2007, 02:33 PM   #10
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Default Re: What's the deal with all the emulation on PSP?

>
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