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[aprssig] A funny packet story/joke (The KISS guys will get it)

Gregg Wonderly gregg at wonderly.org
Thu Nov 10 20:20:20 UTC 2005


Zeff_Wheelock at harvardpilgrim.org wrote:
> Not to split hairs or anything:
> 
> 
>>Switching to 64 bit memory addresses will thus provide 4.2 billion times 4.2 billion distinct
> 
> locations.
> 
> The actual math should be 4.2 billion x 4.2 billion + (4.2 billion x 4.2 billion).
> 
> If I was to go from 6 bit to 12 bit, 6 bit would be 32, 12 bit is 2048.
> 32x32= 1024, so you are missing by 1024.  So the math would be 32x32+(32x32) to get the answer.  I
> think we are talking somewhere upwards to 18,446,744,073,709,551,616

I think you missed counting some powers of 2.

6 bits is 64, 5 bits is 32.  64x64 is 4096 which is what 2^12 is.  2^10 is 1024, 
2^11 is 2048, 2^12 is 4096.

Gregg Wonderly
W5GGW




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