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'[OT:] Challenging - Another thought applied to Pi'
2004\06\25@122250 by Dominic Stratten

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Heres something I've been thinking about for a while.

If you took a 16F627 Pic Microcontroller with 1024 words of memory and 35
instructions, how many possible programs could be generated for this
microcontroller (working or not).

This brings me back to the theory that Microsoft have a million high powered
computers generating random code for Intel Cpu's.

Every now and again a usable program drops out of one of these machines and
they package it and sell it as an operating system or office package. The
downside of this method is that the software is usually very buggy and
normally needs fixing before its even been released ;-)

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2004\06\25@123203 by Spehro Pefhany

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At 05:25 PM 6/25/2004 +0100, you wrote:
>Heres something I've been thinking about for a while.
>
>If you took a 16F627 Pic Microcontroller with 1024 words of memory and 35
>instructions, how many possible programs could be generated for this
>microcontroller (working or not).

There are 1024 * 14 bits, so 2^(1024 * 14)
~= 3.681440950105214388934181504608e+4315
(ignoring bad opcodes)

A rather large number. Even if you could test one program per femtosecond,
the universe will be gone before you test even the tiniest percentage of
them.

The earth itself will last only another 1.5E32 femtoseconds before it is
engulfed by the sun.

Bset regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spam_OUTspeffTakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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