The file TEKTEST.FOR.BL is the main program to test the TEK GIN mode

This program draws some graph and let the terminal enter the GIN mode.
When a key is pressed(with or without CR) the program prints the 5 bytes
that it received(decimal), prints the character pressed and prints the 
decoded scaled and unscaled screen position of the pointer ( On a tek4010 
or tek4014 these values are supposed to be the same I think)

Then the program wait for another keypressed (from GIN mode) and starts
allover again. Pressing  a 'q' or 'Q'  forces the program to stop

The file TEKTEST.EXE is the VAX/VMS executable of TEKTEST.FOR.BL

The file SUBTEK.FOR.BL contains a subset of the fortran tek plot library.
(all the routines needed to link tektest.for.bl) In this file there are 
two VAX dependent routines: SEND and ATTACH

SEND is a routine to send one byte at a time to an output stream
ATTACH is needed to link the keybord to a input stream

SEND is called from the routine ADEOUT
ATTACH is called from routine INITT