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Subject: Re: Playing Against Older Chess Programs

Author: David Dory

Date: 11:22:51 07/16/02

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On July 16, 2002 at 12:06:44, Joshua Lee wrote:

>On July 16, 2002 at 05:00:07, David Dory wrote:
>
>>On July 15, 2002 at 14:37:15, Joshua Lee wrote:
>>
>>>Hello, I was wondering if you were going to play against the older programs on
>>>the SSDF list how to compare them to let's say my 500Mhz Laptop to set them up
>>>correctly to where they would play on the "Same" level as they did on the
>>>original hardware they were tested on? I realize some programs were tested on 8
>>>and 16bit computers can anyone tell me which ones on the list weren't 32bit and
>>>how this will effect the settings? To start with i assume 180seconds on the
>>>original hardware but on a 500Mhz that would make some of those older engines
>>>Already master strength.
>>>486/50-66 MHz
>>>486/33 MHz
>>>386/25-33 MHz
>>>386/16-20 MHz
>>>68000 8 MHz
>>>Amiga 68000
>>>
>>>etc.
>>>
>It is an answerable question first which of the systems mentioned above are 32
>bit? Which are 16bit? Which ones are 8bit?
>Start there. Then is for example 50Mhz with 8 or 16 bit the same as 50Mhz 32Bit
>computer? If you can answer those questions for me despite what you said You
>have helped me.

This is to the best of my knowledge:

I believe the 486's ran as high as 120 Mhz, in their last year (DX2, maybe?)
Other than that, AFAIK, the 486's were unchanged.

486's - with DOS, all were 16 bit or 8 bit
 "    -   "  Windows3.1 and up - could be 32 bit, or 16 bit. 8 bit possible
             if running in a DOS or "console" window.

386's - same as 486's, above. The main improvement to the 486 was on-chip
numeric processor (for DX only), and higher clock speeds.

6800 - I believe these were 16 bitters, went to 32 bits with the 68020. I'm sure
some long time Apple folk could tell you much better than I.
Obviously, the Amiga sharing the same CPU, had the same number of bits/byte.
Richard Lang's "Mephisto" chess programs were run on these CPU's.

6502 - The earliest Apples - Ed Schroeder's "Rebel" chess program came to fame
on this 8 bit CPU.

80286 - an 8 and/or 16 bit design.

8088/8086 - 8 bit

Z-80 - Zilog's famous CPU. Only 8 bits. This was the CPU used by the Chess
Challenger (the Spracklen's) software. Standard speed was 4 Mhz, but the "B"
model ran at 6 Mhz, and I had a sample Z80 that ran at 8 Mhz. It ran so hot I
don't know if it was commercially released, but it would be the "C" model if it
was.

Good luck, Joshua!

David



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