Re: AS/400

[Rob Dixon <rob.dixon@xxxxxxxxxxx>]

Ken


>         You and I are probably the only people that actually worked that
> equipment.
>         I remember placing rpg code, inside a compiler deck of cards.

I also worked on a /360 20.  But the 444 and 421 tabulators were several years
earlier - you programmed them by wiring a plugboard.  When you had finished you 
had
a total jumble of wires.  Bugs were called "back circuits".


> Neil Palmer wrote:
> >
> > Rob,
> >
> > That was a common trick with card machines.  I believe the 2560 card
> > readers (S/360 Mod 20 I worked on back in early 70's - and possible even
> > the 5424 card readers on the S/3) had a hidden switch under the covers
> > that doubled their speed (and greatly increased the cost and monthly
> > maintenance charge).  Once you "found" this switch you could flip it and
> > run the thing at the higher speed.  If you needed maintenance, or if the
> > CE was due for Preventive Maintenance (remember that !  ;-)  ) you would
> > flip the switch back.  When he left, you'd change it back again.
> >
> > Someone told me an early Burroughs computer  (1800 ???) had a switch you
> > could flip to make it run faster too.
> >
> >

Best wishes

Rob
________________________________________________________

Erros plc

44 (0) 1844 239 339

http://www.erros.co.uk - The AS/400 Neural Database for the Internet

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