IBM 5155 Manual To Operations page 326

Ballpoint
Pen
4
Place the 64/256KB Memory Expansion Option
on a flat surface with the switch block facing up.
Study the figure below. There are two types of
switch blocks: rocker switch block and slide
switch block. Identify the type of switches on
your option. Go to the charts on the next page
to make the proper switch setting.
Memory Option
Switch Block
I
o
0 0 DO! 0
II
0
II
0
II
-------------~
o
0 0 0
o
Di"O
I
- - - - - - - - - - - - - - 1
o 0 [
I
i
I
or
Rocker
Slide
Switch
Switch
6 64/256KB Memory Expansion
January 1984