amt1.1

6),  7)  THESE MODS ARE MERELY MAKING USE OF THE POINTS THAT WERE
CONVENIENTLY LEFT ON THE BOARD TO DO DATA INVERT SWITCHING.  I USED
DPDT SWITCHES FOR THIS BECAUSE I WANTED A FOOLPROOF WAY OF KNOWING
WHEN THE DATA WAS INVERTED.  I TURN ON A RED LED WITH THE SECOND
SWITCH CONTACT TO TELL ME THAT ONE OF THE SWITCHES IS NOT
NORMALIZED.  THE RED LED IS MOUNTED IN THE SLOT JUST TO THE RIGHT OF
THE SEND LIGHT ON THE FRONT PANEL.  YOU CAN FIGURE OUT THE SERIES
RESISTOR FOR YOUR PARTICULAR LED.  I USED THE SAME STYLE LED THAT
THE REST OF THE UNIT HAS.
THE POINTS TO BE SWITCHED WITH THE TWO SWITCHES ARE ON THE
SCHEMATIC.  THE RCVE DATA INVERT IS LABELED L11 INPUT NOR/REV AND IS
LOCATED IN THE MIDDLE OF THE UPPER LEFT QUARTER OF SHEET 1 OF THE
SCHEMATIC.  THE TX DATA INVERT POINT IS LABELED L10 OUTPUT NOR/REV
AND IS LOCATED IN ABOUT THE SAME AREA OF SHEET 3. I WILL LEAVE YOU
TO FIND THEM ON THE BOARD.  ANY EXISTING JUMPERS WILL HAVE TO BE
REMOVED, OBVIOUSLY.
continued in file amt1.9