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Re: IBM system/360 ad

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On 2019-11-27, David Wade <g4ugm@dave.invalid> wrote:

> On 26/11/2019 22:50, Charlie Gibbs wrote:
>
>> Although propagation delays were a factor, I suspect that marketing
>> was as well.  Some shops had to go to a larger CPU than they needed
>> in order to get enough memory.  Third-party suppliers were quick to
>> jump in.  I once used a 360/30 that had 128K of memory, even though
>> you could only go to 64K on a stock machine.  A switch and indicator
>> light for the extra address bit was placed in an unused portion of
>> the panel.
>
> I seem to remember hearing that some of those upgrades needed a lot of 
> re-working of the hardware, on the other hand that was the time of the 
> expensive "no change" upgrade. Printers where the speed was set by a 
> link, but getting it changed was expensive.
>
> Disk drives that were 100mb until a wire was cut when they became 200Mb...
>
> etc. etc. etc.

This particular /30 also had 3rd party disk and tape drives, along
with the memory upgrades.  IBM was Not Pleased.

The ultimate 3rd party story I heard was the shop that had a 370/168
with all plug-compatible peripherals - and then they replaced the
processor with an Amdahl.  The only IBM part left was the software.

-- 
/~\  cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ /  I'm really at ac.dekanfrus if you read it the right way.
 X   Top-posted messages will probably be ignored.  See RFC1855.
/ \  "Alexa, define 'bugging'."

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IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-25 13:20 -0800
  Re: IBM system/360 ad Quadibloc <jsavard@ecn.ab.ca> - 2019-11-25 15:07 -0800
    Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-26 01:22 +0000
      Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-27 12:54 -0800
        Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-28 18:08 +0000
      Re: IBM system/360 ad Ahem A Rivet's Shot <steveo@eircom.net> - 2019-11-28 09:44 +0000
        Re: IBM system/360 ad Peter Flass <peter_flass@yahoo.com> - 2019-11-28 11:04 -0700
  Re: IBM system/360 ad Anne & Lynn Wheeler <lynn@garlic.com> - 2019-11-25 14:41 -1000
    Re: IBM system/360 ad scott@slp53.sl.home (Scott Lurndal) - 2019-11-26 01:31 +0000
    Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-27 12:49 -0800
      Re: IBM system/360 ad Andy Burns <usenet@andyburns.uk> - 2019-11-27 21:23 +0000
        Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-27 13:39 -0800
          Re: IBM system/360 ad J. Clarke <jclarke.873638@gmail.com> - 2019-11-27 18:18 -0500
            Re: IBM system/360 ad Alexander Schreiber <als@usenet.thangorodrim.de> - 2019-12-02 00:23 +0100
              Re: IBM system/360 ad scott@slp53.sl.home (Scott Lurndal) - 2019-12-02 15:37 +0000
      Re: IBM system/360 ad David LaRue <huey.dll@tampabay.rr.com> - 2019-11-28 03:16 +0000
  Re: IBM system/360 ad David Wade <g4ugm@dave.invalid> - 2019-11-26 21:35 +0000
    Re: IBM system/360 ad Bob Eager <news0073@eager.cx> - 2019-11-26 22:21 +0000
    Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-26 22:50 +0000
      Re: IBM system/360 ad David Wade <g4ugm@dave.invalid> - 2019-11-27 00:41 +0000
        Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-27 05:49 +0000
          Re: IBM system/360 ad David Wade <g4ugm@dave.invalid> - 2019-11-27 11:22 +0000
            Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-27 19:54 +0000
              Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-27 13:05 -0800
          Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-11-27 13:04 -0800
            Re: IBM system/360 ad Anne & Lynn Wheeler <lynn@garlic.com> - 2019-11-27 13:11 -1000
            Re: IBM system/360 ad Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2019-11-28 18:08 +0000
              Re: IBM system/360 ad J. Clarke <jclarke.873638@gmail.com> - 2019-11-28 13:28 -0500
                Re: IBM system/360 ad Quadibloc <jsavard@ecn.ab.ca> - 2019-12-01 13:16 -0800
                Re: IBM system/360 ad Niklas Karlsson <anksil@yahoo.se> - 2019-12-03 15:14 +0000
                Re: IBM system/360 ad hancock4@bbs.cpcn.com - 2019-12-04 13:01 -0800
              Re: IBM system/360 ad Dan Espen <dan1espen@gmail.com> - 2019-11-28 19:41 -0500

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