[TUHS] Happy birthday, Dennis Ritchie!
Dave Horsfall
dave at horsfall.org
Sun Sep 10 11:27:48 AEST 2017
On Sat, 9 Sep 2017, Steve Johnson wrote:
> Part of that problem was probably electronic, not software. Many of
> the early terminals were half-duplex. The normal mode was that the
> terminal typed what came over the line, and the keyboard was locked. If
> you wanted to let the terminal send data, you needed to send a control
> character to unlock the keyboard, and then another one to lock it when
> you wanted to send data again.
Aah, well I remember the times that I felt like leaning over to hit
the Big Switch on our 360/50, when the console jammed...
That was the Blue Button, of course, not the Red Switch (we weren't
allowed to pull that).
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."
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