Pspuae (amiga) Guide

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Zitat von Bouncer

Sorry to double post. Anyways is anybody still actually working on this emulator? I hope they are! :(

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Sorry, but no one knows for sure.
We´ll have to wait and see...

Excellent guide - thanks very much!

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Zitat von Dementia13

There´s lots of stuff that needs improving, mainly in speed, I think.
My guess is that Christoph simply got tired of working on it or ran into complications becouse, as I understand it, the amiga is a pretty complicated machine to emulate (any emulator is hard work, for that matter.)
I would send a e-mail to him asking but he says not to bother him about PSPUAE.

It´s probably up to someone else to continue the work
(as someone did with this newer version)

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I've been using Amigas and still do, for 15 years.

PSPUAE is simply a port of E-UAE, Christoph didn't code much of anything. That's not to put him down, he's great for the work he's done in modifying the sourcecode to work on the PSP, adding a keyboard, mapping it to the PSP buttons & easy rom selection screen, auto frameskip etc.. but the inner workings are all E-UAE.

The Amiga is an extremely difficult machine to emulate, and that is why there are virtually no alternatives for the PC (WinFellow is outdated a lot), E-UAE is crossplatform and WinUAE is windows.

The coder of WinUAE is very skilled and has updated it beyond the original plain UAE (which WinUAE was based on), so much so that E-UAE is now updating slowly towards being as good as WinUAE, by using bits of sourcecode from it.

What i'm trying to say here, is pretty much no-one is going to even bother tweaking the sourcecode for speed improvements, as it's just too complicated and is the job of the WinUAE and E-UAE coders.

The only thing Christoph might be able to do is add what is called JIT (Just In Time) emulation, that means when a function is first executed, it gets translated from 68k binary into PSP's native binary language, and then stored in a cache. Once that function is performed again, it's loaded from the cache and performed without having to be translated again. This means a 10x speed increase and is how WinUAE works so damn quick on a PC when JIT is on.

P.S Has anyone ported bogomips or anything of a benchmark nature to the PSP to find out how it compares with a 333mhz PC?

Edit: If I could just add, after PSP-UAE was released, there was a major update to E-UAE which gave it a great speed increase. I'd like to know what version of E-UAE PSP-UAE is based on.

an informative post there Mick.

i too am a long standing Amiga user, and keeping a keen eye on pspUAE.

Interestingly, i've tested pspUAE with 3 different kickstart roms now, 1.2 & 1.3 obviously work (being A500 roms) but most intesting of all i found that kickstart 2.05 works (an a600 rom).
The A600 supports easy adding of harddrives and is capable of running the excellent WHDLoad game harddrive installer. This means that if it was made possible to mount HDFs (hard drive files) the load-speed of games on pspUAE could be massively increased.
Combined with manual memory settings, and the ability to swap ROM files (ok, and JIT or any other speed increase would help greatly too) pspuae users could really enjoy those programs which run nicely on it.

I looked at the source code and it seems like PSP-UAE is based on an early release of the 0.8.22 version of UAE. As E-UAE is at version 0.8.28 and has several performance improvements we may be able to improve the speed on the PSP.

I also had a quick look at the E-UAE source code and I think it will require some if not a lot of work to migrate to the 0.8.28 version on the PSP.

i'm a little confused by your post Ric....

as far as i can tell you are saying that speed increases are possible by updating the source to a newer version of e-uae, but that its hard work to do it, right?

i assume no poor soul is gonna volenteer for the job at hand?

Correct. By using the latest source for E-UAE we may be able to get speed increases. I doubt that I will have the time to complete the migration but I am going to spend a couple of hours investigating the effort required.

sounds cool ric.
i love this emulator but it would be even better if it was faster.

New info about PSPUAE and eLoader 0.97 "Bock" (Confirmed on fw2.01)

*You no longer have to autoload the eLoader to be able to save a state.
*PSPUAE now starts 100%, even if you run other homebrew before it.

Can someone just confirm that there´s no problem on the other firmwares, that would be great.
Also... the TIFF expoit on 2.0 needs testing again... anyone up to it?

Dementia: I'll test it tomorrow on 2.0 w/ the TIF exploit when I get to work.

(I live in Sweden too, so I'll try to update before lunch)