A Technical History of Apple's Operating Systems

Bryan Pope bpope at wordstock.com
Thu Jul 27 07:57:58 CDT 2006


And thusly were the wise words spake by Dave Dunfield
> 
> 
> > Although according to the author the 6502 can address 65K, not 64K.
> 
> This is very common, and is based on an assumption of 'k' meaning
> 1000 (decimal), not 1024 - 16 bit bus - 65535 bytes (65 thousand).

Dave,

	I hate to be a picker of nits, but you forgot byte 0...  
So there is actually 65536 bytes of memory but the last byte is 
at address 65535 or $FFFF.

> I've seen it in data sheets and other reasonably technically accurate
> material - I guess it depends on your point of view (and how low-level
> your experience is :-)
> 
> Hard drive manufacturers have been doing the same thing with "meg"
> for years - specing in decimal 1,000,000 makes the drive sound bigger
> than specing in 2**20 sized blocks.
> 

	I really think this is a very silly practice...  Imagine 
what would happen if they did that with RAM sticks?!

Cheers,

Bryan



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