Memory Expansion Board (260-5161)        Settings       Faxback Doc. # 2045

1st Board   B2 - S  128 K   (384K total system memory)
            B2 - S  256 K   (512K total system memory)

2nd Board   B3 - S  384 K   (640K total system memory)
            E  - F  512 K   (768K total system memory)

Use kit 260-5162 to upgrade memory on 260-5161
Order 260-5162 from National Parts using part # AXX-7142. This kit contains 
eighteen 64K X 1 DRAMS at 150 nanoseconds.

* 128K Memory Expansion Module (260-5160) is required in a "128K Tandy 2000"
  prior to installing a 260-5161.

After selecting a slot, "unlock" the panel covering it. Do this by pulling
the buttons on either side of the panel. Remove the panel.

1. If the board your are installing is the first External 128K Board added
   to your computer, do Step 4A. If it is the second, do Step 4B instead.

2. Remove the jumper that connects Test Points E and F. This jumper is 
   between locations U70 and U71.

The S-B1/B2/B3 jumper, which is near location U65, must connect Test Points
S and B2. It should already be positioned correctly. If it is not, however,
pull it up and reposition it.

3. DO NOT remove the jumper that connects Test Points E and F.

The S-B1/B2/B3 jumper, which is near Location U65, must connect S and B3.
If it does not, pull it up and reposition it so it does.

(RJS/jlc-03/28/94)