grind crank

( n., //)

   A mythical accessory to a terminal. A crank on the side of a monitor,
   which  when operated makes a zizzing noise and causes the computer to
   run faster. Usually one does not refer to a grind crank out loud, but
   merely makes the appropriate gesture and noise. See {grind}.

   Historical note: At least one real machine actually had a grind crank
   -- the R1, a research machine built toward the end of the days of the
   great  vacuum  tube  computers,  in 1959. R1 (also known as `The Rice
   Institute   Computer'  (TRIC)  and  later  as  `The  Rice  University
   Computer'  (TRUC))  had  a  single-step/free-run  switch for use when
   debugging programs. Since single-stepping through a large program was
   rather  tedious,  there  was  also  a  crank  with  a  cam  and  gear
   arrangement  that  repeatedly  pushed  the  single-step  button. This
   allowed  one  to  `crank'  through  a  lot of code, then slow down to
   single-step for a bit when you got near the code of interest, poke at
   some  registers  using  the  console  typewriter,  and  then  keep on
   cranking. See http://www.cs.rice.edu/History/R1/.

[glossary]
[Reference(s) to this entry by made by: {software rot}]