IBM Personal Computer Manual To Operations page 228

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5-1/4 Inch Diskette Drives
The following figures show how switches 1, 7 and 8
must be set for the number of diskette drives installed.
Switch Block 1
Switch Block 2
~
1
2
3
4
5
6
7
a
1
:2
3
4
5
6
7
8
0- Drives
~~DDDDD~~
mDDDD~~~
1
;>
3
4
5
6
7
8
1
;>
3
4
5
6
7
8
1 - Drive
~~DDDDD~~
mDDDD~~~
1
:2
3
4
5
6
7
8
1
;>
3
4
5
6
7
8
2 - Drives
;~DDDDD~~
mDDDD~~~
Coprocessor
Switch 2 is set to indicate if the coprocessor is installed.
Switch Block 1
Switch Block 2
With Math Coprocessor
ioQODDD[ID ;OODDDQQQ
~
Without Math Coprocessor
;O~ODDDDD ~DDDDDQQQ
5-10 Switch Settings

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