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Designing and building a coffee table
stuartChilds
3
maker, hacker, doer

Comments

January 9, 2017 16:07

Nice project.
Getting all nostalic now.
Oh for mainframes, punched cards and teletypes and 24-hr job turnarounds.
Wish I'd kept hold of one of the IBM XT's my firm chucked out.
A thing of beauty, solid, engineered, bomb-proof. Ran office suites like Framework on about 200 bytes of memory and the 5.25 inch disk really was floppy.

0 Votes

December 29, 2016 08:35

Looks like the cost was more in the $3-5 million 1983 US Dollars range. A factor of about 100,000 or more?

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December 29, 2016 08:35

Now you just need to inlay a transparent info sheet comparing the technology to modern specs. Here's a useful link to an IBM history page:
https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4381.html
If I read it correctly, some interesting points: Clock speed 15-20MHz, Raspberry Pi 3B 1GHz, 50-60x. Of course this does not take into account the RISC/CISC differences but gives an order of magnitude comparison between 10x and 100x that shoulod hold up. Memory config up to 64MBytes if you push it. Pi 3B 1G RAM, about 16x. Volume, as you show is a bit different. Pi 3B with RAM, 64GB flash, various I/O like e'net, etc under 6 cubic inches, The IBM system with its max capabilities as described above would take an entire room with raised floors and special cooling (you might want to attach a couple of stick-on heat sinks to the Pi board ). Total cost of the Pi board with power supply, 64G uSD, case, heat sinks about $70. Total cost of IBM system circa 1983? I have no idea. I would guess in the $100k range? You need to include the cost of the space and special power and cooling facilities to be fair. Oh and those are 1983 dollars. Interesting project ;)

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