Linux is KING - Couldn't be hacked - Mac, Vista went down in flames
Michael D. Setzer II
mikes at kuentos.guam.net
Wed Apr 2 20:30:43 UTC 2008
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On 2 Apr 2008 at 18:09, Matthew Saltzman wrote:
From: Matthew Saltzman <mjs at clemson.edu>
To: hlhowell at pacbell.net, For users of Fedora <fedora-
list at redhat.com>
Organization: Clemson University
Date sent: Wed, 02 Apr 2008 18:09:32 +0000
Copies to: Subject: Re: Linux is KING - Couldn't be
hacked - Mac, Vista went down in
flames
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>
> On Wed, 2008-04-02 at 09:48 -0700, Les wrote:
> > On my punch cards they did. Every card had a number sequential to the
> > sequence. The punch we used inserted them automatically. Well, the
> > programming card did. The reference number used for calls may have been
> > different, but I don't remember it.
>
> Those weren't line numbers per se (in the sense that BASIC had line
> numbers, for example). In FORTRAN, an 80-column card was divided into
> fields:
>
> Column 1: 'C' indicated a comment line, ' ' a code line.
>
Columnt 1-5: is for line numbers and on many compilers they had to be right
aligned.
> Column 2-6: Statement label numbers. These were arbitrary numbers used
> as targets for FORMAT, GOTO and "computed GOTO" (now *that* was a flow
> control concept!), and DO statements. These did not have to obey any
> ordering rules. There was no concept of an if-else block or a while
> loop with a logical test, so flow control was handled by GOTOs of some
> variety. Targeted statements were usually CONTINUE statements (no-ops),
> because there was some ambiguity regarding when the targeted statement
> was actually executed, and because it made reorganizing the flow a bit
> easier (especially with punchcards[1]).
>
Column 6: Was used for continuing information from the previous card.
Generally putting a 1 in column 6 for the first continuation line, and 2, and so
on, but most didn't care. COBOL uses Column 7 for this, and uses a hyphen
if splitting a word or quoted text.
> Column 7-72: Code.
>
> Column 73-80: Ignored. Intended to be used for sequence numbers so you
> could sort the cards down in order if somebody dropped the deck. The
> numbers could be anything really, for example a three-letter alpha code
> identifying the deck and a four-digit sequence number.
>
> (Somebody is bound to correct me on the actual column numbers, now...)
>
> Aside: In the early FORTRANs, the body of a loop was always executed
> once, even though the test was at the top of the loop. So you needed a
> guard if you wanted to avoid making any passes through the loop at all.
> That changed with FORTRAN 77.
>
> [1] Of course, you'd want to re-sequence cards at some point if you
> reordered them.
>
> >
> > Our programs were HUGE, multiple trays. Each tray was denoted by the
> > color of the diagonal line. We had 8 colors, so I guess we never had
> > more than 8 trays, because I don't remember pairs of lines anywhere.
> >
> > Regards,
> > Les H
> > On Wed, 2008-04-02 at 11:27 -0500, Mikkel L. Ellertson wrote:
> > > Les wrote:
> > > > On Tue, 2008-04-01 at 20:36 -0700, Richard England wrote:
> > > >> Try dropping two trays , each about 2.5 feet long. They did that to me
> > > >> in the data center when I was in grad school. Luckily I had just
> > > >> printed they contents out and resequenced them. The manager of the data
> > > >> center had a cow when I told the staff to put the deck back together,
> > > >> but my advisor (bless him) stood behind me and insisted that if they had
> > > >> taken due care it wouldn't have happened.
> > > >>
> > > >> Ah cards, loved 'em (not). And drum cards. Boy there was an arcane art!
> > > >>
> > > >> ~~R
> > > >>
> > > > Did you have the diagonal line drawn on the top to help?
> > > >
> > > > If they were Fortran, or COBOL, you could always sort on the line
> > > > number. I don't remember the other languages having line numbers.
> > > >
> > > > Regards,
> > > > Les H
> > > >
> > > Are you sure about Fortran and COBOL having line numbers? I didn't
> > > use COBOL enough to remember any more, but I remember only using
> > > line numbers or labels in FORTRAN if they were the target of a
> > > branching instruction.
> > >
> > > Mikkel
> > > --
> > > fedora-list mailing list
> > > fedora-list at redhat.com
> > > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
> >
> >
> --
> Matthew Saltzman
>
> Clemson University Math Sciences
> mjs AT clemson DOT edu
> http://www.math.clemson.edu/~mjs
>
> --
> fedora-list mailing list
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+----------------------------------------------------------+
Michael D. Setzer II - Computer Science Instructor
Guam Community College Computer Center
mailto:mikes at kuentos.guam.net
mailto:msetzerii at gmail.com
http://www.guam.net/home/mikes
Guam - Where America's Day Begins
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