IBM Personal Computer

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