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  BT2450 How To & Overclocking
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   Author  Topic: BT2450 How To & Overclocking  (Read 867 times)
Robert Weck
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Re:BT2450 How To & Overclocking
« on: April 6, 2006, 05:10AM »
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Quote from: Degradation on April  5, 2006, 10:19PM   

I tested the positions per second (thanks for the tip) and both the Master Chess and the Master 2200X averaged ~1200 pos/sec.

Hmm, that's interesting; maybe Radio Shack's part list is not correct?

The Miami with 10 MHz has ~1500 nps and the TC2080 with 7 MHz has ~1000. Your results are somewhat between that.

To be absolutely sure about the speed, you could go one step further and let your machines solve some positions of the BT2450-testsuite.

I don't know, if you want to do this...

Quote:

Should the -rd:n and +rd:n displays give the same results? They seemed to on mine.

Considering the part list, i would have thought no.


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I wonder what the positions/sec would be on the 2250XL.

the 2250XL should have about 3000 nps, as it has the same program and speed as the Saitek GK2100/Centurion/TC2100/Cosmos/Chess Challenger (i don't know, if i forgot any other GK2100 clones)

I could confirm this with the BT2450-test.

The nps-display on the 2250XL is a little bit confusing for me (has only three ciphers and varies from ~150 to ~650...)


Robert

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Endspielgott
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Re:BT2450 How To & Overclocking
« Reply #1 on: April 6, 2006, 04:59AM »
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Quote from: Degradation on April  5, 2006, 10:19PM   


I wonder what the positions/sec would be on the 2250XL.


Hopefully I can tell you this in a week or so...I got one recently at ebay and it should arrive soon.

Christian
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Degradation
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Re:BT2450 How To & Overclocking
« Reply #2 on: April 5, 2006, 10:19PM »
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I tested the positions per second (thanks for the tip) and both the Master Chess and the Master 2200X averaged ~1200 pos/sec. I wonder if it was just that the Master Chess was released later than the 2200X and required 4 instead of 6 C batteries and having a smaller case perhaps cost less to make?

Should the -rd:n and +rd:n displays give the same results? They seemed to on mine.

I wonder what the positions/sec would be on the 2250XL.
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Re:BT2450 How To & Overclocking
« Reply #3 on: April 5, 2006, 01:31AM »
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Quote from: Degradation on April  4, 2006, 04:04PM   

Thanks Robert. From memory my Radio Shack Master is model 600-2217 (pdf manual available on RS support site) and comes in the case currently used for the Saitek/Mephisto Chess Challenger.

Ok, i have found it. It looks to me, that it is also a GK2000 clone, but only with half of the speed of the 2200X. In the parts list, the 2200X has a 20MHz-crystal (resulting in 10 MHz speed), the Master only has a 10 MHz crystal (which should give him 5 MHz (really that little? i always thought, the lowest speed with GK2000 would be 7/14 MHz! ))

But you can easily check this: set the option, that the display shows the nodes/sec (-rd:n to +rd:n), set the level to infinite (9:99:99) and play 1.f3 from the starting position. The Master should have only about half the positions/sec of the 2200X.

Please let me know your results; i'm curious now! 

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What were the results of your chess computer tune ups?

Usually you have a good chance to increase the speed for 10-20% with a 6502-CPU and even 100% for a 6301. But this doesn't work always. When the speedlimit of the CPU is already reached, then there is no way to get more out of it.

I don't know, how much is possible with the H8-CPUs of your Radio Shacks.

There is another point, that you have to watch: Some computers use the same quartz for their CPUs and the clock. That means, e.g. when you double the speed of the CPU, then the clocks are also running double as fast and the thinking time of the computer is reduced at the same amount.

Example:
When you set the level to 2mins/move, it uses only 1 minute, which means, that in spite of the higher speed, the effective strength stays the same! So you have to take a higher level (4 mins/move in this case) to correct this.


hope, this helps,
Robert
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Re:BT2450 How To & Overclocking
« Reply #4 on: April 4, 2006, 04:04PM »
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Thanks Robert. From memory my Radio Shack Master is model 600-2217 (pdf manual available on RS support site) and comes in the case currently used for the Saitek/Mephisto Chess Challenger. The Master 2200X is model 600-2213 and like you say looks like a GK2000 clone.

I have not seen much mention of the Radio Shack Master Chess computer here or elsewhere. I capped HIARCS on a Palm T3 to 1900 elo and the Master Chess won several games against it. The Master was set to 10sec per move if I remember correctly.

I was trying to use HIARCS to gauge the playing strength of some of my machines but it proved difficult or at least gave me results I wasn't expecting.

What were the results of your chess computer tune ups?
« Last Edit: April 4, 2006, 04:12PM by Degradation » Report to moderator Logged
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Re:BT2450 How To & Overclocking
« Reply #5 on: April 3, 2006, 01:30AM »
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Quote from: Degradation on April  1, 2006, 03:05PM   

Can anyone point me to a link advising on how to use the BT2450 on tabletop machines that may not display moves while thinking? I am trying to determine the speed/strength of my Radio Shack Master vs the 2200X.

I am not an expert concerning RS machines (they are not available here in Germany!), so maybe i am wrong with some issues...

But as much as i know, the 2200X should have the program of the GK2000 (SSDF-Elo ~1900)

And i only know the 'Radio Shack Master 2200X' (like this one: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8783003757&ru=http%3A%2F%2Fsearch.ebay.com%3A80%2F%2Fsearch%2Fsearch.dll%3Ffrom%3DR40%26satitle%3D8783003757%26fvi%3D1)

This is clearly a GK2000 clone...

You want to say, that 'Radio Shack Master' is different from the '2200X'? That sounds interesting for me!

Quote:

I have a suspicion that the Master Chess may be stronger.

At least the 2200X should be able to show the move, it is thinking about. Do they both have the same display and options?

Do they have an 'Info' button? This should display the move! (if my suspicion is correct, that they have a Frans Morsch-program inside!)

Quote:

Anothe question. Has anyone attempted to overclock their chess computers?

I am not a friend of overclocking, but i have some tuned chess computers. With some limitations it is possible! What do you want to know?


best regards,
Robert

P.S.: With RS 'Master' you don't mean a 2250XL?
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BT2450 How To & Overclocking
« Reply #6 on: April 1, 2006, 03:05PM »
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Can anyone point me to a link advising on how to use the BT2450 on tabletop machines that may not display moves while thinking? I am trying to determine the speed/strength of my Radio Shack Master vs the 2200X. I have a suspicion that the Master Chess may be stronger.

Anothe question. Has anyone attempted to overclock their chess computers?

Thanks in advance.
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