<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 8, 2024, 9:18 AM <<a href="mailto:arnold@skeeve.com">arnold@skeeve.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dan Cross <<a href="mailto:crossd@gmail.com" target="_blank" rel="noreferrer">crossd@gmail.com</a>> wrote:<br>
<br>
> I wonder if anyone can shed any light on the timing and rationale for<br>
> the introduction of “word erase” functionality to the kernel terminal<br>
> driver. My surface skim earlier leads me to believe it came to Unix<br>
> with 4BSD, but it was not reincorporated into 8th Edition or later,<br>
> nor did it make it to Plan 9 (which did incorporate ^U for the "line<br>
> kill" command). TOPS-20 supports it via the familiar ^W, but I'm not<br>
> sure about other PDP-10 OSes (Lars?). Multics does not support it.<br>
> VMS does not support it.<br>
><br>
> What was the proximal inspiration? The early terminal drivers seem to<br>
> use the Multics command editing suite (`#` for erase/backspace, `@`<br>
> for line kill), though at some point that changed, one presumes as<br>
> TTYs fell out of favor and display terminals came to the fore.<br>
><br>
> - Dan C.<br>
<br>
My memory jibes with this -- through V7 defaults were # and @, and BSD<br>
changed to ^H / DEL and ^U. ^W was a BSD thing, probably inspired by<br>
TOPS-10.<br>
<br>
There was a patch on USENET that added ^T to print the load average that<br>
we put into the vax at Georgia Tech. A professor who'd come to us from MIT<br>
saw it and was surprised tht we could do it on Unix. :-)<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">^T made it into BSD and lives on to this day in the BSDs. If I were catty, I'd say real unix still can... :) too bad linux never picked it up.</div><div dir="auto"><br></div><div dir="auto">Warner</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
</blockquote></div></div></div>