Re: Some of Ron's Code?

In article <1165416640.148566.299970@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"Jim" <jhefferon@xxxxxxxxx> wrote:

Ken Tilton wrote:
"Cape Canavaeral (AP) -- The space agency likely won't attempt to launch
past December 17 since flight controllers want Discovery on the ground
before the new year. Shuttle computers aren't designed to make the
change from the 365th day of the old year to the first day of the new
year while in flight."
The only point to remember is that these computers physically are
1970's technology. As a student intern I did a little bit of work on
the Hubble and the answer to some of these kinds of reports was that
the systems simply did not have the capability. (I don't know about
this particular one, though.)

How does old hardware make it hard to write correct software?

--
Barry Margolin, barmar@xxxxxxxxxxxx
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
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Relevant Pages

  • Re: Some of Rons Code?
    ... past December 17 since flight controllers want Discovery on the ground ... Shuttle computers aren't designed to make the ... the systems simply did not have the capability. ...
    (comp.lang.lisp)
  • Re: Some of Rons Code?
    ... past December 17 since flight controllers want Discovery on the ground ... Shuttle computers aren't designed to make the ... The resource constraints of older hardware often requires engineering tradeoffs to be made in order to shoehorn all the required functionality into the available memory and processor cycles. ... Sometimes optimizations are made that trade correctness in one area for capability in another. ...
    (comp.lang.lisp)
  • Re: Some of Rons Code?
    ... past December 17 since flight controllers want Discovery on the ground ... Shuttle computers aren't designed to make the ... The resource constraints of older hardware (and particularly of older ... correctness is a function of the spec, ...
    (comp.lang.lisp)
  • Re: Some of Rons Code?
    ... Ken Tilton wrote: ... past December 17 since flight controllers want Discovery on the ground ... Shuttle computers aren't designed to make the ...
    (comp.lang.lisp)
  • Re: Some of Rons Code?
    ... past December 17 since flight controllers want Discovery on the ground ... Shuttle computers aren't designed to make the ... How does old hardware make it hard to write correct software? ... The resource constraints of older hardware (and particularly of older ...
    (comp.lang.lisp)