From: utzoo!decvax!cca!gwyn@Brl@sri-unix
Newsgroups: net.unix-wizards
Title: Re:  VT100/VT640 ^S/^Q and EMACS
Article-I.D.: sri-unix.3236
Posted: Sat Sep 11 17:39:32 1982
Received: Mon Sep 13 01:51:32 1982

From:     Doug Gwyn 
Date:     9 Sep 82 20:51:45-EDT (Thu)
Probably the VAX isn't responding fast enough to the ^S because of
using a silo polling technique on the DZ11 rather than character
interrupts.  I explained in an earlier Unix-Wizards note several
reasons to not use the silo alarm + polling method in the dz driver;
add this reason to the list.