IBM 5155 Manual To Operations page 327

5
320K Total
Memory
384K Total
Memory
448K Total
Memory
512K Total
Memory
Switch settings on the 64/256KB Memory
Expansion Option indicate the total amount of
memory on the system board and the Memory
Expansion Option. The following figures show
the settings for the various amounts of total
memory. Set the switches on your 64/256KB
Memory Expansion Option now.
January 1984
64/256KB Memory Expansion 7