From mboxrd@z Thu Jan 1 00:00:00 1970 From: krewat@kilonet.net (Arthur Krewat) Date: Thu, 24 May 2018 11:08:24 -0400 Subject: [TUHS] Control-T (was top) In-Reply-To: References: <20180524122021.857BC18C09A@mercury.lcs.mit.edu> Message-ID: On 5/24/2018 10:50 AM, Ronald Natalie wrote: > Another related creeping featurism was the integration of the control-T feature that was prevalent in many of the DEC 10/20 OSs. Control-T in TOPS-10 was done straight out of the monitor. If you were on a slow 300 baud or 110 baud terminal on say a DZ11*, and kept hitting Control-T really fast, you'd slow down everything else on the machine as there was no buffering of serial TTY I/O and the monitor would sit and wait for each character to be transmitted. ak * a DZ11 is UNIBUS and was only available on a KS10 - but I'd imagine any straight serial port on a KA/KI/KL10 would do the same. If you were, say, on a DCA mux, that had a 14.4K serial link straight into the UNIBUS, there was much less of an effect.