SCP/Microsoft 20HAL uploader

[Dennis Boone]

 > Partially related to that is a program called “20HAL” which was a
 > code uploader Microsoft used in the late stages to get code from
 > Microsoft in Bellevue to IBM in Boca Raton, FL.

The TOPS-10 manual says that:

    (SET) TTY FILL n

sets delay characteristics for the line to class `n`.  There's a table
of the number of filler characters sent after each of a number of
different control characters.  Class 3 uses the most fillters.  The
filler characters used are CR after a CR, and DEL after all the others.

It could make sense to do this during a file transfer, depending on the
assorted endpoints, etc.

De