On Thu, Aug 13, 2020 at 1:19 PM Henry Bent <henry.r.bent(a)gmail.com> wrote:
so this damn teeny tiny display would cycle through a sequence of codes
that told you
what the machine was doing; it came with a book that told you
what each code meant. Something like "387" meant mounting /usr. Ugh; I just
found a page on
ibm.com describing these "IPL codes."
IPL = Initial Program Load = boot(strap), by the way. It also has the
connotations of "toggle in".
Seated one day at the keyboard
I was weary and ill at ease,
And my fingers rattled noisily
Over the clicking keys
I know not what I was coding
Nor what I had IPLed in
But I struck one chord of logic
Like the sound of a great IF-THEN.
--Guy Steele (I think)
But this reminded me: Does anyone remember a system of any sort where there
were *two* corresponding sets of alphanumeric error codes, one short and
meaningless like F32 and the other somewhat meaningful like POWER_LOW? I
made up this example, but I have a feeling I saw or read about such
a system. I can't pin it down with Dr. Google.
I already know about plenty of systems that have *numbers* and alphabetics,
like <errno.h>, or just alphabetics and a (localizable) text explanation,
like VMS, or just a number and a text explanation, like the BIOS errors.
Such number-only error systems are still very common in things like "smart"
washing machines, where the cost and unreliability of a non-tiny screen
simply isn't acceptable.
John Cowan
http://vrici.lojban.org/~cowan cowan(a)ccil.org
Wer es in kleinen Dingen mit der Wahrheit nicht ernst nimmt, dem kann
man auch in grossen Dingen nicht vertrauen. --Albert Einstein on honesty