IBM Personal Computer

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---
<II
I
~ ~
i
00-
j.
~
System Board
Switches
III
1 -
64/256K
option
with
64K
installed
1 -
64K
option
1 -
32K
option
2 -
64K
options
1 -
32K
option
1 -
64/256K
option
with
128K
installed
1 -
32K
option
416K
Total
Memory
160K
+
256K
on
System Board
Switch
Block 1
Switch
Block 2
liOOQQOOOOJ
64/256K
Option
64K
Option
Card
Switches
Card
Switches
It~Q~~~QQQ
I
li~Q~Q~~~~J
li~Q~~~~~~J
li~Q~Q~~~~
I
li~Q~~Q~QQ
I
liQQ~Q~Q~Q
I
32K
Option
Card
Switches
If~QQ~~~~~
I
li~QQ~~~~~
I
li~QQ~~~~~
I
)
( )
( )