Author: Rafael Vasquez
Date: 02:42:05 03/14/02
Go up one level in this thread
On March 14, 2002 at 04:46:28, Travers Waker wrote: My M505 runs stable at 45mhz. I can put it to 54 but then the clock will not coordinate. I read that the m500 is sligthly faster and that Handspring are the fastest. >The Palm m100 has a Dragonball EZ processor according to >http://www.palmos.com/dev/tech/hardware/compare.html . I think it is very >unlikely that your m100 is actually running at 54MHz (even if your overclocking >utility is telling you that it is). Only the Dragonball VZ Processors, as found >in the m500 series, are cabaple of clock speeds like that. You would be lucky >to get your m100 running at even 30MHz. My Palm Vx, which also has an EZ >processor, can only reach 28MHz (which, together with the other speed-ups >Afterburner provides, results in a Chess Tiger 14.7 speed index of 1.11). > >If you're interested in how to determine what the highest clock rate is that >your palm reliably supports, read the email (appended below) that I got from >Christophe when I asked him about this issue. > >Travers > ><email from Christophe> > >> I'm running ChessTiger on my Palm Vx. I'm also using Afterburner to >overclock the Palm, but I seem to be experiencing a >> problem: >> >> If I overclock to the maximum that Afternburner will allow (54Mhz), >ChessTiger reports a Tiger Mark of 2.11. I would be very >> happy about this (considering I saw a post by you in ICD Forum saying you >were getting a Tiger Mark of 1.35 on your M505 >> clocked at 54Mhz), except that I don't believe it. The clock (the one >that counts down the game time) in Tiger and Genius >> also runs much slower than it should, which is probably why Tiger thinks >it is getting much more work done in a set amount of >> time than it really is. >> >> I remember seeing a post in ICD Forum about this aproximately a week ago, >but it still wasn't clear to me what the >> consequences of this slow clock were. What is the best way to optimize >the strength of Chess Tiger using Afterburner? >> >> Maybe this is a good topic for the FAQ. The Afterburner documentation >doesn't seem to address this clock slow-down. Also, >> if I'm running at 54Mhz without the Palm crashing, but with the clock >running slow, is Tiger playing stronger than it would >> at the highest possible Mhz at which the clock keeps time properly? I >imagine that it is, since it's taking longer than it >> should on each move (since the clock is slow) and it's able to do more in >that time because the CPU is at 54Mhz), but I want >> to know if this is actualyl true. Maybe my CPU just thinks it's running >at 54Mhz, but is really not. >> >> Thanks for any help - and thanks for Chess Tiger. I spend many hours >every week playing with Tiger and Genius, and they're >> very much responsible for my renewed interest in chess. > > >Your analysis is correct. > >This is explained in AfterBurner's documentation. > >AfterBurner sets up the computer to overclock it to 54MHz, but the PLL (the >electronic device in charge of the frequency generation) cannot reach the >programmed frequency, and worse, it oscillate between LOWER frequencies. > >But AfterBurner does NOT know that there is a problem, and it keeps on >correcting the time as if the computer was actually running at 54MHz. > >The result is that the system thinks that the time passes very slowly, and >that's why Chess Tiger believes it can reach this high performance level. > >We do not know how to fix this at this time. The programmer of AfterBurner >should try to do something for this. If he does not, and if there exists a >technical solution to fix this (or at least to warn the user), we will >implement it in Chess Tiger. > >So what should you do now? > >You should set AfterBurner to the highest frequency which still gives an >accurate time measurement. > >1) set the frequency with AfterBurner >2) start Chess Tiger and execute the "Speed test" (this not only displays a >performance index, but also tries to adjust Chess Tiger's clock to the >computer's speed) >3) let the program think for approx. one minute (the position does not >matter) and check Chess Tiger's clock with a stopwatch > >Repeat steps 1, 2 and 3 until Chess Tiger's clock matches your stopwatch. > >Step 2 is very important, don't forget to do it every time you change your >Palm's speed. > >Most Palms cannot run higher than 29MHz. Maybe it's the case of your Palm >Vx. > > > The Chess Tiger technical support > support@chesstiger.com > http://www.chesstiger.com
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