Re: Blast From Past - IBM 670 Mag Drum Computer

Subject	Re: Blast From Past - IBM 670 Mag Drum Computer
Newsgroups	comp.os.linux.misc
References	(1 earlier) <slrn106csda.1c51.trepidation@vps.jonz.net> <mco1b2F2dvgU3@mid.individual.net> <vNWdnfCkkbY9X_X1nZ2dnZfqnPudnZ2d@giganews.com> <tN9aQ.36360$V4j4.27196@fx46.iad> <20250707090941.00000774@gmail.com>
From	c186282 <c186282@nnada.net>
Date	2025-07-07 17:52 -0400
Message-ID	<qRucnWIbALYD3PH1nZ2dnZfqn_WdnZ2d@giganews.com> (permalink)

Show all headers | View raw

On 7/7/25 12:09 PM, John Ames wrote:
> On Sat, 05 Jul 2025 13:30:01 GMT
> Charlie Gibbs <cgibbs@kltpzyxm.invalid> wrote:
> 
>> When the CE came in to investigate, he pulled one of the main circuit
>> boards and a VLSI chip fell off it.  The thermal cycling had caused
>> the chips to literally walk right out of their sockets.
> 
> Hah, wow - "chip creep" is a fairly common cause of marginal behavior
> in old home computers (particular in the era of NMOS ICs,) but that's
> the most extreme case I've heard of!

   Ordinary oxidation of the pins and sockets, especially
   with hot-running chips, can become a big problem too,
   even more in a humid environment. Used to have a couple
   of the old full-size IBM-PC boards full of DRAM chips.
   About twice a year they'd get flakey. Had to kind pry up
   rows of chips and jam them back in again - which broke
   the oxidation layer. Gold-plated pins and sockets are
   worth the extra few cents.

Back to comp.os.linux.misc | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Blast From Past - IBM 670 Mag Drum Computer c186282 <c186282@nnada.net> - 2025-07-02 23:30 -0400
  Re: Blast From Past - IBM 670 Mag Drum Computer Allodoxaphobia <trepidation@example.net> - 2025-07-03 12:03 +0000
    Re: Blast From Past - IBM 670 Mag Drum Computer rbowman <bowman@montana.com> - 2025-07-03 18:43 +0000
      Re: Blast From Past - IBM 670 Mag Drum Computer c186282 <c186282@nnada.net> - 2025-07-05 02:14 -0400
        Re: Blast From Past - IBM 670 Mag Drum Computer Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-05 13:30 +0000
          Re: Blast From Past - IBM 670 Mag Drum Computer rbowman <bowman@montana.com> - 2025-07-05 18:05 +0000
          Re: Blast From Past - IBM 670 Mag Drum Computer Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-07-05 13:25 -0700
          Re: Blast From Past - IBM 670 Mag Drum Computer Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-06 00:20 +0000
            Re: Blast From Past - IBM 670 Mag Drum Computer rbowman <bowman@montana.com> - 2025-07-06 03:38 +0000
          Re: Blast From Past - IBM 670 Mag Drum Computer John Ames <commodorejohn@gmail.com> - 2025-07-07 09:09 -0700
            Re: Blast From Past - IBM 670 Mag Drum Computer c186282 <c186282@nnada.net> - 2025-07-07 17:52 -0400
              Re: Blast From Past - IBM 670 Mag Drum Computer rbowman <bowman@montana.com> - 2025-07-08 03:30 +0000
                Re: Blast From Past - IBM 670 Mag Drum Computer c186282 <c186282@nnada.net> - 2025-07-08 01:55 -0400
                Re: Blast From Past - IBM 670 Mag Drum Computer c186282 <c186282@nnada.net> - 2025-07-08 22:36 -0400

csiph-web