IBM Personal Computer

)
)
)
640K
Total Memory
384K
+
256K
on System Board
System Board
Switches
Switch
Block 1
Switch
Block 2
ItOOQQOODO
I
If~Q~~QQQQ
I
64/256K
Option
64K
Option
32K
Option
Card
Switches
Card
Switches
Card
Switches
li~Q~~QQQ~
I
1 -
64/256K
option
with
256K
installed
1 -
64/256K
option
with
64K installed
I;Q~~Q~~~~
I
1 -
64K
option
I;Q~~~~Q~Q
I
liQ~~~~~~~
I
1 -
64/256K
option
with
256K
installed
2 -
64K
options
li~Q~~QQQ~J
00
I
I;Q~~Q~~~~
I
,
~
,
If
I;~Q~~QQ~~
I
1 -
64/256K
option
with
256K
installed
1 -
64/256K
option
with
128K
installed
I
liQ~~~Q~QQ
I
UI
I
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