Bitcoining on a 1401

Chuck Guzis cclist at
Thu May 28 20:42:37 CDT 2015

On 05/28/2015 05:08 PM, js at wrote:

> Wow.  Are common machines now really *billions* of times faster??


Thus, the average time to add two 10-digit numbers is 40 cycles, or 
about a 2.2 kHz add rate. Adding two 20-digit numbers is 70 cycles, or 
an add rate of 1.2 kHz. Compare that to a modern superscalar 
microprocessor with a peak add rate of two 64-bit add instructions per 
cycle at 3-GigaHertz, or an add rate of 6 Ghz; the modern microprocessor 
is 6,000,000,000 / 1,000 = 6,000,000 times faster!

So, no, not for the common ones of today.

The surplus stores during the 1960s used to sell 1401-style SMS cards by 
the crateful.  I used to disassemble them for the transistors.


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