Free Republic
Browse · Search
General/Chat
Topics · Post Article

To: goldbux

Wow. I’ve never had to opportunity to see a Tube computer. Oldest I’ve seen was an 1970’s vintage Westinghouse computer which booted from punch card and used Drum memory. After that it was DEC PDP’s, and time marched on.....


99 posted on 01/18/2017 5:31:41 PM PST by NYAmerican
[ Post Reply | Private Reply | To 94 | View Replies ]


To: NYAmerican
I recall the 1105 having a lot of useless but pretty front-panel lights. Four 8-bit words stitched into a 32-bit "accumulator"; four sets of accumulators; something like that. Each 32-bit display had two lights for each bit; one for on, one for off. Didn't trust the tiny light bulbs to display correctly since they also had a high burnout rate.

We also had an IBM 1620 with maybe 4K of magnetic core memory. Each single core had two wires running through it. Had to pulse both wires to trigger a change state in the core from zero to one & back.

The 6600 at LMSC (formerly LMSD – Let's Move Some Desks) had a big kachunka 80-column chain-&-gear-driven line printer. The printing batch job – before [genius!] Ralph Gorin at SAIL wrote a spooler (simultaneous peripheral online output layer) – ran all night, printing out Top Secret data.

The management spooks insisted that a heavy opaque shroud be thrown over the printer to prevent any non-cleared personnel from peeking at the sensitive info. Took ten months to acquire that level of security clearance, so the clearance-pending grunts they hired to work the AM shift regularly spent the morning digging compacted paper shreds out of the heavy printer gears. Your tax $ at work.

103 posted on 01/18/2017 6:09:03 PM PST by goldbux (When you're odd the odds are with you.)
[ Post Reply | Private Reply | To 99 | View Replies ]

To: NYAmerican

You might enjoy strolling through the Computer History Museum in Mountain View, CA. Some of it’s a dumping ground for beloved but hopelessly antique machine artifacts. There’s a rogues gallery of portraits along a long wall. On my first visit, I was amused to recognize almost every one as a former Professor, employer, or colleague.


104 posted on 01/18/2017 6:18:57 PM PST by goldbux (When you're odd the odds are with you.)
[ Post Reply | Private Reply | To 99 | View Replies ]

Free Republic
Browse · Search
General/Chat
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson