Memory Expansion Board (250-1009) Features Faxback Doc. # 2011 This board is to be installed as the second memory board with the 250-1004 Memory Expansion Board. This board does not have a DMA Controller Chip and will expand the total memory to 512K of 640K. (two or four rows of memory). For information on the 250-1004 Memory Expansion Board refer to the following Faxback Doc. #'s: 2004 Features 2005 Settings 2006 Installation 2007 Board Layout (CSS/jlc-03/27/94)