[TUHS] "9 skills our grandkids won't have" - Is this a TUHS topic?
cowan at ccil.org
Sun Jul 3 10:08:25 AEST 2022
On Sat, Jul 2, 2022 at 7:02 PM Mark Sutton <mes at lazo.ca> wrote:
> /2 6:05:30 AM PDT, Ori Idan <ori at heliconbooks.com> wrote:
>> On Thu, Jun 30, 2022 at 7:38 PM Paul Winalski <paul.winalski at gmail.com>
>>> o why CTRL/S and CTRL/Q are used for flow control in a shell command
>>> line session
>> Also would be happy to know.
ASCII reserved four characters, ^Q through ^T, for unspecified device
controls. The ASR 33 Teletype, which had a built-in paper tape reader and
punch, allowed programmatic control of these devices using these
characters: ^Q started the reader (assuming paper tape was in it) and ^S
stopped it. In classic Teletype use, the protocol was bidirectional. (By
the same token, ^R started the punch, which meant that characters sent to
the terminal were punched as well as printed, and ^T stopped it.
Some DEC OSes used ^T to print a single-line status of the current
process. I do not know why ^C (end of text, as opposed to ^D which is end
of transmission) took on its present role, but it was definitely already
true in early DEC OSes.
>>> o why an application memory dump after an application crash is called
>>> a core file
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