TECHNICAL REFERENCE MANUAL

                         ERRATA SHEET # 1

Errata #1  09-29-82

   Page 60        Insert the following addition to ECN 1000 -

      Under part b, jumpers, step 3 should read:
      Lift U6-4 and jumper IC pin directly to U6-5.

Errata #2  10-22-82

   Page 47        Insert the following to the procedure for
                  constructing the special cable:

        Break line 24 of the cable,  Line 24 corresponds to
      pin 23 of the connector.  This prevents the good
      computer from being disabled when U2-25 of the bad
      board is pulled to ground

Errata #3  11-01-82

   Schematic      Note the following correction to the LNW80
 (Page 1 of 4)    PCB Schematic Section 1-0 at IC location U4
                  as shown on the following diagram.