cageyjames

How do you come to that conclusion? I would assume the "Autoscale" would not afffect the PXBus in anyway. But I have no proof to that.

JmE

From the table for values of L and M for the PXA255 on the Intel website. The link is earlier in this thread... I can dig it up if you want since it is probably pretty buried. :)

According to what I see in the table, when L=27 and M=4 then the Run mode and Turbo mode both are 398 MHZ. This is also the only setting that produces a PXBus of 199 MHZ in the table. The problem is that when Run and Turbo are the same, autoscaling is not happening, right?

Therefore, it may be that the PXBus of 199 MHZ that we have all been talking about these months since the PXA255 came out would only refer to one maximum speed mode on the PXA255... not all the time.

Make sense?

-JmE-

whitelyt

So basically, if one was to use OC software on the PXA255 running PPC2002, we would loose the benefits of having autoscaling. Right?

JmE

Here is the link to the Intel document.

From page 4... mtbballer writes:

"For those interested, Intel's XScale Developer Guide has additional info on this...

http://developer.intel.com/design/p...ls/27869301.pdf

Look on page 66-67 (pages 3-4 to 3-5). Section 3.3.3 and Table 3.1 has some info on what to expect. "


-JmE-

BTW: It looks like HighPlainsD may have hit the nail on the head on page 2 with "I dont think you guys are correct. When you are in Normal or power save mode, the PX Bus Frequency is 99 mhz, but when you change to maximum performance mode, the PX Bus frequency is at 199 Mhz, "

which would make sense because we do not have a Maximum Performance setting in PPC2002... therefore no PXBus speed of 199 MHZ without 3rd party software!

At least it sounds possible...

FrstdOne

Can anyone tell me how to stop Pocket Hack Master from causing the power button on my Axim frm flashing all the time, even when it's off?

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JmE

Quote:

Originally posted by whitelyt So basically, if one was to use OC software on the PXA255 running PPC2002, we would loose the benefits of having autoscaling. Right?

It is just a guess from working through this insanity but yes... Unless you use like Pocket Hack Master or something to autoscale by software. And I don't think that is Dell's fault but just a limitation of PPC2002.

We could go a long way in confirming this if we had a post or posts with:

1) Dell Axim w/ WM2003 in Maximum Performance setting... What is the CPUID info (Run Speed, Turbo Speed, and PXBus)

2) Dell Axim w/ WM2003 in Normal setting... What is the CPUID info (Run Speed, Turbo Speed, and PXBus)

3) HP 2215 in Maximum Performance setting... What is the CPUID info (Run Speed, Turbo Speed, and PXBus)

4) HP 2215 in Normal setting... What is the CPUID info (Run Speed, Turbo Speed, and PXBus)

I think with these 4 answers, it would go a long way in saying if it is the right direction or not...

-JmE-

JmE

Quote:

Originally posted by FrstdOne Can anyone tell me how to stop Pocket Hack Master from causing the power button on my Axim frm flashing all the time, even when it's off?

I believe if you go to the pop up menu of the minimized Pocket Hack Master and choose Settings and uncheck Show Notifications it will stop the light from doing that...

-JmE-

cageyjames

JmE,

I understand what you are saying, I can't believe its true. How could we have gone this long and have not heard this before. If you are right, I owe you a beer on this...

JmE

If those interested would look at table 3-1 on page 67 titled "core PLL Output Frequencies for 3.6864 MHZ Crystal" at http://developer.intel.com/design/p...ls/27869301.pdf it appears that this is the case. The table NOW makes sense to me...

Anyone agree?

-JmE-

JmE

Quote:

Originally posted by cageyjames JmE, I understand what you are saying, I can't believe its true. How could we have gone this long and have not heard this before. If you are right, I owe you a beer on this...

Actually, everyone who posted here has done a mighty good job at looking at this problem.

I am a little embarassed because I could not make sense of the table in the PDF until all of this debate.

When I am in AZ, we will have a few beers, my treat! :D

-JmE-

FrstdOne

Quote:

Originally posted by JmE I believe if you go to the pop up menu of the minimized Pocket Hack Master and choose Settings and uncheck Show Notifications it will stop the light from doing that... -JmE-

It worked, thanks! One other question:

What is the absolute best setting for a PXA250/B2 400MHz?

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JmE

Quote:

Originally posted by FrstdOne It worked, thanks! One other question: What is the absolute best setting for a PXA250/B2 400MHz?

I really don't remember for the PXA250. There are profiles you can download at http://www.pockethackmaster.com

There should be a lot of older threads here and on http://www.brighthand.com with best settings.

Sorry I couldn't help you there.

-JmE-

JmE

To All,

This is what I posted on the other forums that I sought help with this problem/finding earlier today. I think it sums up pretty much what I think the whole PXBus thing is all about. Thanks for everyone's help, it was driving me crazy. :rolling:




Now I think I understand!

If those interested would look at table 3-1 on page 67 titled "core PLL Output Frequencies for 3.6864 MHZ Crystal" at http://developer.intel.com/design/p...ls/27869301.pdf it appears that this is the case. The table NOW makes sense to me...

Apparently PPC2002 is at 99 MHZ PXBus for good reason... we lose autoscale if it is set at 199 MHZ PXBus. According to the table, when it is set at 199 MHZ, the RUN and Turbo modes are the same... hence NO autoscale. The only Autoscale options are with PXBus of 50 MHZ (probably the Axim Basic) and PXBus of 99 MHZ (Axim Advanced). This is the design of the PXA255 not the fault of Dell or PPC 2002 or WM2003.

-JmE-

mtbballer

Quote:

Originally posted by FrstdOne It worked, thanks! One other question: What is the absolute best setting for a PXA250/B2 400MHz?

For the 250, I posted earlier that the optimal LMN settings are 27,2,2.

JmE

Quote:

Originally posted by mtbballer For the 250, I posted earlier that the optimal LMN settings are 27,2,2.

Actually, those settings are the default for the Axim Advanced. It can be overclocked with higher settings and acheive higher speeds. The best source would be those I mentioned before.

27,2, 2 yeilds 398 MHZ. The PXA250 Axim Advanced is capable of better than that with the right settings. I used to run them...

-JmE-