1200 2FD  (250-3001)              Memory              Faxback Doc. # 1973

*NOTE: 250-1009 is discontinued, as are the other four boards listed below 
and in the 900 Listing.  

Note: Any XT Compatible memory board that does not have a DMA chip should 
work. See PCM magazine for a list of vendors. Check with the vendor to make 
sure that their board supports the 1200HD. 

Expand from 256K to:

                      384K      512K                   640K

Memory Adapter       250-1009   250-1009+      Must use Special Order Boards
Add to Adapter                  260-5162*      Example  900-2052 900-2124         
                                                        900-2075 900-2066

Note: To upgrade to 640K you must use some type of Special Order memory board

Note: This is the memory upgrade procedure for a 5 slot 1200 HD 

Note: Refer to Faxback Doc. # 1972 for Main setting the Main Logic Board when
upgrading the memory in this computer.

Note: Refer to Faxback Doc. # 1963, 1200 A version for 7 slot 1200 HD memory
upgrade information.

The 260-5162 consists of eighteen 64K X 1 DRAMS at 150 nanoseconds.
The 250-1009 is a 256K Memory Expansion Board.

Note: The 260-5162 chip kit can be ordered from National Parts under part
number AXX-7142.


(smm 08/24/93)