Memory Expansion Board  (250-1009)      Settings        Faxback Doc. # 2008

Note: Refer to Faxback Doc. # 2010 for Board Layout.

Tandy 1000 Second Memory Board

Jumpers:
Memory Level            Jumper
of Board               Settings
                     E1/E2    E3/E4
128K                  OFF      ON
256K                  ON       ON

Note: Order from National Parts AXX-7142 under catalog number 260-5162.
This kit contains eighteen 64K X 1 DRAMS at 150 nanoseconds.

1. Place the Memory Expansion Board on a clean, well lighted surface. Make
   sure that you avoid any static electricity build-up while handling the
   board, since it can destroy certain integrated circuits. Touch a grounded
   metal object before touching the board. DO NOT stand or work on a carpeted
   floor.
2. With the board oriented so that the edge connector is down and to your
   right, locate the pairs of pins, along the bottom edge of the board label-
   ed E1/E2 and E3/E4. Each pair is referred to as a jumper.

Each point of a jumper pair has a metal pin extending about 1/4" above the
surface of the board. Over one or more pairs is a rectangular black plastic
block that has two openings in its base. This block, when placed over a pair
of pins, electrically connects them together. When a block is over a pair of
pins it is ON. A pair of pins without a jumper is called OFF.

To determine the proper placement of jumpers for the board which you are
about to install, please refer to Chart Two. If this board is your second
Memory Expansion Board, please note that while installation procedures are
the same as for the first board, the second board will appear to have fewer
chips installed. This is a normal condition.

3. Once you have set the correct combination of jumper placements for
   your board, grasp and either remove or place the plastic block over the
   selected pair of pins. While firm pressure is desirable, do not force a
   block over pins if excessive resistance is encountered. You are now ready
   to install the board.

(CSS/jlc-04/27/94)