Overclocking to 400mhz...

[Nytrix]

Hi,
I know that overclocking the psp's firmware to more than 333 is dangerous..but i was wondering if overclocking it to 400mhz was possible. Or close to that.
Is there a way someone could mod IR Shell 1.4 for me to where i could boot an eboot at higher than 333mhz? Im working on an interesting concept and need some help getting that done.. Im assuming that it would be fairly easy to overclock to a "custom" mhz.. cuz it's power values multiplied like a PC overclocking right?
Someone please help me out.

Much thanks
-NytriX

[muratcan]

Sounds like a plan, but your PSP could seriously heat up from that. I'd love to see a couple apps at that speed though!

[SodR]

You wont be able to do that with scePowerSetClockFrequency () since that one is limited in the sdk. But if you can write you own function ( I have no idea how to do that...) to overclock the psp it might be possible.

[Nytrix]

Originally Posted by muratcan

Sounds like a plan, but your PSP could seriously heat up from that. I'd love to see a couple apps at that speed though!

yea im aware of that.. i have a few spare psp's that i could test it on..
im thinking that since the psp can run natively at 333mhz (ex sony has games that run at that speed) then we should be able to push out a bit more without damaging the psp. Like in a computer you can overclock it to a certain degree without noticing any malfunctions or parts burning out and so on..may be different for psp, but im not sure. But now im just looking for someone who could modify IR SHell to overclock to 400 or something close to that..or someone that could make an eboot launcher that launches selected eboots at that speed or close to that.
much help appriciated.
thanks

[Nytrix]

Originally Posted by SodR

You wont be able to do that with scePowerSetClockFrequency () since that one is limited in the sdk. But if you can write you own function ( I have no idea how to do that...) to overclock the psp it might be possible.

oh that makes sence..
i noticed on IR Shell 1.4 there is 4 processor speed options 233,266,333,and 100...

100? does that scePowerSetClockFrequency in the SDK have a limit of up to 333? or did the person who made IR Shell write there own function?

[FLai]

if your psp explodes can i get your flash chip?

[EminentJonFrost]

Originally Posted by Nytrix

oh that makes sence..
i noticed on IR Shell 1.4 there is 4 processor speed options 233,266,333,and 100...

100? does that scePowerSetClockFrequency in the SDK have a limit of up to 333? or did the person who made IR Shell write there own function?

overclocking even further...
hope you succeed.
(sorry, I know nothing of the PSP outside of lua.)

oh, the creator of IR Shell is Ahman BTW.

[Nytrix]

thanks, and haha if my psp explodes and the flash chip is still intact then you might be able to have it.. i might try doing a dual flash board..sort of like the all firmware psp thing that showed up about a week ago or so.
So yea..if anyone could help me out and code an extended overclock eboot loader or a modded version of IR shell..please do so.

[Dotmeister]

/**
 * Set CPU Frequency
 * @param cpufreq - new CPU frequency, valid values are 1 - 333
 */
int scePowerSetCpuClockFrequency(int cpufreq);

in psppower.h

You're out of luck man, 333 is the maximum you can set.

[SodR]

I don't know if I hav got you right but there are three numbers in scePowerSetClockFrequency and IR shell because the first one reglates the acctual processor, the sceont one reglates the speed of the media engine and the the third one reglates the speed of the gpu. So the maximal speed you can run it at using that inbuilt function ( as we speak ) is setting the processor at 333mhz, the media engine at 333Mhz and the gpu at 166mhz ( scePowerSetClockFrequency (333,333,166) )

[Mr_Stanley_Dudek]

What about the FSB? When the PSP is running at 333 Mhz, the bus set to like 166.
[going out on a limb]
Is it possible to up the bus speed? If it's anything like a PC, then it should have multipliers.[/]

[gracz54]

Originally Posted by SodR

So the maximal speed you can run it at using that inbuilt function ( as we speak ) is setting the processor at 333mhz, the media engine at 333Mhz and the gpu at 1666mhz ( scePowerSetClockFrequency (333,333,1666) )

166, not 1666

[SodR]

Originally Posted by gracz54

166, not 1666

Yes, of course it should be 166. My mistake.

[Theknightinhell]

wouldn't that be 1.6 ghz?

[SodR]

Originally Posted by TheKnightInHell

wouldn't that be 1.6 ghz?

Yes it would. But c'mon, my finger slipped, nothing more.

[mannymix03]

ok let me just answer this is a simple manner,

You cannot clock the psp over 333 using software. You could do a hardware mod to it, let me just say this.... not a good idea.

[Nytrix]

ok thanks for the more in-depth explanation.
and thats a good question why can't we overclock the fsb?
also what is stopping the psp from running at a faster speed. i know that computers all it is is voltage multiples causing the speed increase, so shouldnt we be able to have different amounts of power running in the processor/fsb?

also out of curiosity does anyone know what type of processor the psp uses, and info/specs on it?
Im thinking it's ARM architecture but i think im getting confused with the Gp2X.

[IchigoKurosaki]

I'm not responsible for what you do with this...

ori $a0,$0,400 #//set CPU to 400MHz
syscall 0x218d
ori $a0,$0,200 #//set Bus to 200MHz
syscall 0x218e

[Nytrix]

Originally Posted by IchigoKurosaki

I'm not responsible for what you do with this...

ori $a0,$0,400 #//set CPU to 400MHz
syscall 0x219e
ori $a0,$0,400 #//set Bus to 400MHz
syscall 0x219f

unfortuately im not a full blown coder so i was hoping that someone could help modify the IR shell 1.4 to be able to set the psp's cpu speed to about 400mhz. the fsb is at 166mhz when the cpu is at 333 correct? cuz if so then that is a little too much of an increase from 166 to 400 for the fsb imo.

would that code work to make the psp's mhz higher?

[IchigoKurosaki]

Originally Posted by Nytrix

unfortuately im not a full blown coder so i was hoping that someone could help modify the IR shell 1.4 to be able to set the psp's cpu speed to about 400mhz. the fsb is at 166mhz when the cpu is at 333 correct? cuz if so then that is a little too much of an increase from 166 to 400 for the fsb imo.

would that code work to make the psp's mhz higher?

asm __volatile__ ("ori $a0,$0,400" : "syscall 0x218d" : "ori $a0,$0,200" : "syscall 0x218e");

There is the C Code...

[Fanjita]

Originally Posted by IchigoKurosaki

I'm not responsible for what you do with this...

ori $a0,$0,400 #//set CPU to 400MHz
syscall 0x219e
ori $a0,$0,200 #//set Bus to 200MHz
syscall 0x219f

Only on v2.0 firmware. And it's exactly the same as just using the API functions. When you call the functions, they're simply translated into the appropriate syscalls by the firmware/eLoader. There's nothing magical about syscalls, they're just the interface used to call the API.

If setcpuclockfreq(400) won't work, then syscall 219e (400) won't work either.

Why would you want 400mhz anyway? n00bs will just go insane with it and start overheating their PSP's.

[Art]

You will only get the speed the hardware provides as has been said.
The oscillators run at a fixed frequency, and the variants you can specify in software
are divided down from the maximum speed.
But you would need to start replacing crystals to increase the maximum speed.

[IchigoKurosaki]

Originally Posted by Fanjita

Only on v2.0 firmware. And it's exactly the same as just using the API functions. When you call the functions, they're simply translated into the appropriate syscalls by the firmware/eLoader. There's nothing magical about syscalls, they're just the interface used to call the API.

If setcpuclockfreq(400) won't work, then syscall 219e (400) won't work either.

Yea your right that is the syscall for 2.00 sry about that so it's limited to 333 on the PSP or the SDK?

Here is the 1.50 version

asm __volatile__ ("ori $a0,$0,400" : "syscall 0x218d" : "ori $a0,$0,200" : "syscall 0x218e");

[Art]

It doesn't appear to say anything about CPU speed in the 2.0 manual,
but all over the net " CPU: PSP CPU (system clock frequency 1~333MHz)"
I don't think they would advertise anything under the maximum.

also what is stopping the psp from running at a faster speed.

Apart from probable hardware limitation, Crosstalk and lack of heat dissipation.
It must have proven cheaper/easier to use multiple CPUs since the Playstation.

[KINGOFNOOBS]

Originally Posted by Nytrix

Hi,
I know that overclocking the psp's firmware to more than 333 is dangerous..but i was wondering if overclocking it to 400mhz was possible. Or close to that.
Is there a way someone could mod IR Shell 1.4 for me to where i could boot an eboot at higher than 333mhz? Im working on an interesting concept and need some help getting that done.. Im assuming that it would be fairly easy to overclock to a "custom" mhz.. cuz it's power values multiplied like a PC overclocking right?
Someone please help me out.

Much thanks
-NytriX

dont do it, i did it with the GBA Emu (the one that had source released) it is WAYYYYYYYYYYYY faster but however it started crashing about 30 minutes in so i turned my psp off immediately.. im doing 366 right now and its working perfectly (btw i have 1.0)

[Nytrix]

Originally Posted by <

dont do it, i did it with the GBA Emu (the one that had source released) it is WAYYYYYYYYYYYY faster but however it started crashing about 30 minutes in so i turned my psp off immediately.. im doing 366 right now and its working perfectly (btw i have 1.0)

ok guys is this legit?
would this work applied to a different eboot without the syscalls?

[KINGOFNOOBS]

Originally Posted by Nytrix

ok guys is this legit?
would this work applied to a different eboot without the syscalls?

well i dont know about 1.5+ but it works with 1.0 though. i tried 500 but nothing happens and reverts back to 222 i guess 400 is the limit

[Nytrix]

can anyone else confirm that that above statement is factual?
because basically everyone is saying it's not possible..and u make it sound so simple.

[KINGOFNOOBS]

Originally Posted by Nytrix

can anyone else confirm that that above statement is factual?
because basically everyone is saying it's not possible..and u make it sound so simple.

thats cuse they have 1.5 and they are'nt using a game there doing it the 'real way' all i did is take the source of a GBA game changed all the 333's to 400 (on 1.0)