Native Resolution for PSP games on PSVITA. [$2,500]

[Epsilon1033]

As the title says, Native resolution for PSP games. (960x544). PSP games are limited to half the vita's native resolution, so they don't exactly look great. The feasibility has already been discussed on reddit so it is certainly possible; its just alot of work.

From reddit (/u/MrColdBird):

"Technically a GE chain hook and a vita-sided port of the PPSSPP renderer would already be enough to get "perfect" PSP emulation with upgraded visuals."

"Let the MIPS processor do the whole PSP work... And tunnel out the GE render chain into VitaOS via kermit, then render it there."

"The GE chain and all registers for buffer transfer are well documented in several PSP developer wikis as well as the PPSSPP sourcecode."

Same goes for kermit on Vita and it's message structures. All it takes is someone that can be assed to put the pieces together."

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There is a $2,500 open bounty on this issue. Add to the bounty at Bountysource.

[robots]

For less technical audience I'll add description of Vita's hardware:

• Vita's CPU is 4 cores of ARM Cortex-A9 + 4 cores of PowerVR GPU + 8 cores for video/audio codec processing
• Sony decided to include PSP's CPU (mips) + GE gpu inside Vita's hardware

All PSP games run natively on PSP hardware with ME(media engine) hardware being emulated by Vita's cpu.

Goal of this project is to emulate GE and redirect the drawing to Vita's GPU.

[robots]

I have started working on this. But do not expect very fast development. This issue is very complicated one in terms of "time". As said in the description everything is documented - but its not only about documentation, its also about understanding and putting pieces together.

So the roadmap is something like this:

1. patch PSP's sceGe module to redirect Texture memory/DrawList memory to shared Vita memory instead of GE's private memory
2. port PPSSPP's GE implementation to Vita - this step will not include scaling for sake of simplicity
3. add scaling to GE implementation once 2. works correctly.

Point 2. is the hardest one here, as some games are timing dependant and it will be tricky to get it right. PPSSPP contains lot of fixes for this, but Vita+ePSP is a bit different in this matter - 2 separate CPUs.

[and-war]

Would this then upscale PSX/PS1 games played on PSVita too? would be great to see them rendered in Higher deff (960x544).

[Rinnegatamante]

Technically this could be possible by running PSX games through POPS via PSPEMU i think.

[thegarlicman123]

$2000

[StamKaly]

GePatch is also in production which seems to have a few games already working.

[BreakPoints]

GePatch is also in production which seems to have a few games already working.

GePatch halted production when TheFloW moved to GTA SA on Vita

[Windows-10-Is-Shit]

The feasibility has already been discussed on reddit so it is certainly possible

Well, if it's been discussed on reddit and it's certainly possible then why isn't reddit doing this? 😄

[wefalltomorrow]

Has any progress been made with this?

[Girotin]

Has any progress been made with this?

Since TheFlow gave up GEpatch, I believe nobody else picked up the project.

I won't judge it though; even if we have quite a good money already accumulated, idk if it's enough for a dev/group of devs to see the amount of job needed and think: "hmm, I think I'll try doing this", this is a VERY ambicious project.

Maybe if we reach 5000 someday? 10000? Idk how much would be necessary for a dev/devs to get interested in this XD
But seeing thinks how they are, 2000 still isn't enough :v

( If there's someone working on this, feel free to correct me )