IBM Personal Computer

)
System Board
Switches
1 -
64/256K
option
with
64K
installed
1 -
64K
option
1 -
32K
option
2 -
64K
options
1 -
32K
option
00
!.
~
1 -
64/256K
option
with
128K
installed
1 -
32K
option
i
~
till
I
~
......
)
224K
Total
Memory
160K
+
64K
on System Board
Switch
Block 1
Switch
Block 2
liOOOQOODOJ
64/256K
Option
64K
Option
Card
Switches
Card
Switches
If~~~Q~OQQ
I
l;~~Q~~~~~
I
If~~~Q~~~~
I
li~~Q~~~~~
I
It~~~QQ~QQ
I
)
I;~~O~~QQQ
I
32K
Option
Card
Switches
li~~QQ~~~~
1
li~~QQ~~~~
I
ri~~QQ~~~~
I
s6U!U
a
S
lI:Jl!MS