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#109883 - 06/12/17 11:10 PM PSP doc and source plan for MAME?  
Joined: Apr 2006
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Dullaron Offline
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Dullaron  Offline
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Did anyone got the documents on PSP device yet?

Who will be working on the source for MAME?

Just wondering.

I wonder what is the hardest. Games files or the games ISO. smile

No I'm not blasting any of the DEV here.

Last edited by Dullaron; 06/12/17 11:12 PM.

Windows 10 Pro 64-bit / Intel Core i5-4460 3.20 GHz / 8.00 GB RAM / AMD Radeon R9 200 Series
#109886 - 06/13/17 12:57 AM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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Just Desserts Offline
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Just Desserts  Offline
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Originally Posted by Dullaron
Did anyone got the documents on PSP device yet?


Other than the official Sony SDK documentation, as far as I know there is no low-level documentation on the PSP hardware. That includes some unfortunately complex subsystems, like the Media Engine or whatever it's called, which handles things like audio and video decompression. It would kind of suck to have an emulated PSP that can't play in-game videos or audio.

Originally Posted by Dullaron
Who will be working on the source for MAME?


For now, nobody. I'm very interested in emulating the PSP, but since none of the other PSP emulator authors seem to be interested in emulating it using anything other than HLE bullshit, there isn't a whole lot of documentation or low-level knowledge to go around. And I'm just not that confident in my MIPS abilities to be able to reverse-engineer the information that's necessary.

Originally Posted by Dullaron
I wonder what is the hardest. Games files or the games ISO. smile


In fact, I'm not sure it's either of those: The real hard part is the fact that (just as far as I know) there aren't even any firmware dumps, or dumps of initial bootloader. Without either of those, it would be pretty hard to emulate the PSP properly in MAME.

If you know of any sites that actually have a dumped PSP BIOS or other firmware dumps, I think we'd all love to know about them. At the very least they could be made into a skeleton driver. smile

#109890 - 06/13/17 04:53 AM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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Dullaron Offline
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Dullaron  Offline
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Fort Worth, TX.
For some reason I was thinking EBOOT.PBP is the fireware. I'm so wrong about this. PSP system software only. Which can be download from here. https://www.playstation.com/en-us/support/system-updates/psp/

I have a PSP 3000 version. This one I think is the best one out of all of the models. smile

Anyway I went to this website just now and I found some of the PSP system board snapshots. Now I know what the PSP system boards look like. https://en.wikipedia.org/wiki/PlayStation_Portable

The only thing I don't like about PSP is the Skype chat. There is no camera support for it. Kind of sucks.

PSP can be patch to where play the games from the ISO and files. Disabled the checking. Won't be enable to use those on the live playing.

Last edited by Dullaron; 06/13/17 04:55 AM.

Windows 10 Pro 64-bit / Intel Core i5-4460 3.20 GHz / 8.00 GB RAM / AMD Radeon R9 200 Series
#109896 - 06/13/17 11:54 AM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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Heihachi_73 Offline
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Now would be the best time to start buying a heap of PSPs for donation and dumping. Better now than when they end up at $100+ each when those obsolete, proprietary, PSP-only UMD drives all crap themselves.

A skeleton driver is still better than no driver at all - at least that way the games, movies and whatever else was put on UMD can be properly documented even if the driver is still untouched ten years from now. There are a number of machines which haven't worked at all in MAME/MESS ever since they were added.

#109897 - 06/13/17 12:10 PM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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R. Belmont Offline
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There is no BIOS dump to make a skeleton driver from.

#109898 - 06/13/17 02:59 PM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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B2K24 Offline
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Not sure if this is useful for anyone.
http://hitmen.c02.at/files/yapspd/psp_doc/index.html#idx2.1

https://pastebin.com/FvG6gP7U

Despertar Del Cementario
https://github.com/mathieulh/Despertar-Del-Cementerio

M33
https://github.com/mathieulh/3.90-M33


I still have my release day Daxter Ice slim 2001 version that I can mess around with if needed.

@Dullaron, the screen on the 3000 is horrible compared to the 2001. There's ghosting and blur because it got changed out for the worse. Also, depending on what version of the MOBO your 3000 has, your unit doesn't have the capability of writing to the battery's serial changing it from normal boot to service mode.

Anyway, it would be cool someday to run various downgraders and homebrew using the PSP via MAME if it can eventually gain that capability.

#109903 - 06/13/17 09:49 PM Re: PSP doc and source plan for MAME? [Re: B2K24]  
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Dullaron Offline
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Dullaron  Offline
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Fort Worth, TX.
Originally Posted by B2K24


@Dullaron, the screen on the 3000 is horrible compared to the 2001. There's ghosting and blur because it got changed out for the worse. Also, depending on what version of the MOBO your 3000 has, your unit doesn't have the capability of writing to the battery's serial changing it from normal boot to service mode.



Old TVs have ghosting too. I love that effect. Not hurting me there.

Heihachi_73: They can get a used PSP from here at For $40 + shipping. Dump it and then send it to MAME DEV Team. https://www.amazon.com/gp/offer-lis...d=1497390489&sr=8-6&keywords=PSP For a start. I saw JAPAN Model PSP1000 seires listed.

Last edited by Dullaron; 06/13/17 09:53 PM.

Windows 10 Pro 64-bit / Intel Core i5-4460 3.20 GHz / 8.00 GB RAM / AMD Radeon R9 200 Series
#109972 - 06/23/17 02:40 PM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
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B2K24 Offline
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This just got posted a few hours ago and seems interesting.

https://github.com/zecoxao/ipltool

Quote
ipltool updated! We finally have a working psp IPL encrypter! Congrats to everyone involved!

Unlike the previously available encrypter (which generated non working blocks), ipltool was tested against real hardware (on DTP-T1000)


- Mathieulh

#109973 - 06/23/17 02:52 PM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
Joined: Apr 2006
Posts: 580
Dullaron Offline
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Dullaron  Offline
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Joined: Apr 2006
Posts: 580
Fort Worth, TX.
Hoping someone show some light on dumping. Will this work? That is the question.

Note: I will be next to dump after someone dump their PSP files. I gotta see this happen.

Last edited by Dullaron; 06/23/17 03:00 PM.

Windows 10 Pro 64-bit / Intel Core i5-4460 3.20 GHz / 8.00 GB RAM / AMD Radeon R9 200 Series
#109974 - 06/23/17 03:27 PM Re: PSP doc and source plan for MAME? [Re: Dullaron]  
Joined: Mar 2008
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robcfg Offline
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robcfg  Offline
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Madrid, Spain
I'll be getting some boards for dumping this weekend.

Besides scanning them for reference, how do I dump them?

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