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January 2012

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From:
"Whittaker, Dewey (EHCOE)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Whittaker, Dewey (EHCOE)
Date:
Wed, 18 Jan 2012 16:26:15 +0000
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Not bad. Gives a whole new meaning to recalling past gigs, even if it hertz.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, January 18, 2012 9:11 AM
To: [log in to unmask]
Subject: Re: [TN] What is the future of electronics assembly?

I remember all that also. Did that for Honeywell and IBM computers.
Thanks for bringing back the memories (pun intended). How's that, Dewey?

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Drew meyer
Sent: Wednesday, January 18, 2012 9:52 AM
To: [log in to unmask]
Subject: Re: [TN] What is the future of electronics assembly?

Dave,  

All the responses I read it brought to mind my time at Hawkeye Institute of Technology earning an electronics technician associate degree.  Keep in mind this is 1978-1980.  

We are learning on training computer systems both programing and debugging.  One day an older model training computer is set up at the front of the classroom.  Immediately everyone wants to know why.  We are informed that we will be learning the function of core memory systems.  The first response of all the students is that's antique (dinosaur) and no one uses it.  The instructors respond that when we graduate at least 25% or more of us will be working with it.

Graduation comes and I go to work at a company in Iowa that sells industrial process control equipment.  Their computers run with core memory 56k of R/W core and a 2k wire ROM.  Why core/wire based systems?  They are non-volatile memory.  A power failure does not result in data loss.

 I repair every thing on the core memories but the core stacks.  The wire ROM, I must repair everything including re-wiring bad wires as the manufacturer of it will no longer service it.  For the next eight years the systems are fully serviced and I repair all their cards.  Cards that include DTL parts.

I believe that older technology dies a little faster today but you can never count a technology that works well and is still available out of the mix that will be present in the future.

To this day I can remember core memory function.  Sense/Inhibit lines, X and Y lines, Data Register to capture the data for output and to re-write the location.  The read cycle was a destructive cycle (the location was erased during a read an had to be automatically re-written to restore the data).

Drew Meyer

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