[Elecraft] 32 bit Elecraft Utility Apps

Fred Jensen k6dgw at foothill.net
Fri Apr 13 16:14:13 EDT 2018


Details, details ... 128 or 120, their both greater than 64 [yes, it is 
120].  It's a long way to the moon and truncation errors in the 
numerical integration summed to unacceptable levels on the UNIVAC 1108 
[64-bit DP FP] machines.  I just couldn't pass up the chance to point 
out that "newest isn't always *that* new." [:-))

<rhetoricalquestion>Speaking of "newest," I haven't turned on my Win10 
laptop in several weeks [maybe a month or a little more].  I did at 
breakfast today, it is now lunchtime and it's still applying updates ... 
apparently 1 at a time.  Why can't it do 4 at a time, one in each 
core?</rhetoricalquestion>

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 4/13/2018 12:48 PM, brian wrote:
> My failing memory seems to recall that the CDC6600 used 60 bit math 
> for floating point single precision operations.
>
> https://en.wikipedia.org/wiki/CDC_6600 seems to confirm that.
>
> They were great machines, till the 7600 then the Cray computers showed 
> up...
>
> It was interesting to bring these machines to their knees by physics 
> calculations that took days to run.  They had to be run on weekends to 
> keep the rest of the lab happy.
>
> 73 de Brian/K3KO



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