6 
Table 6·3. 
Flexible Disk Drive Configuration Bottom  Jumper Functions 
Jumper  Function 
Label 
ID2,IDl, 
SCSI Bus Address jumpers. 
IDO 
ID2 is  most significant bit. 
Default settings:  Address 
3. 
ID2 = out; 
IDI 
= in; 
IDO 
= in. 
EJC 
Eject mode 
In 
= Electrical eject mode (not used). 
Out 
= (default) Manual eject mode. 
LEV 
Pin 
2 
output 
of the density is enabled. 
In 
= enabled.  (Default) 
Out 
= disabled. 
HDS  In 
= enabled.  (Default) 
Out 
= disabled. 
STL 
In 
= enabled.  (Default) 
Out 
= disabled. 
PAR 
Enable 
Parity 
In 
= enabled.  (Default) Controls parity checking of 
data 
on SCSI bus. 
Out 
= disabled. 
MaN 
Motor ON 
In = disabled. 
Out 
= enabled. 
(Default) Drive motor is not turned 
on when the controller is  turned on. 
Function  Jumpers 
Only 
the 
SCSI address 
jumpers 
should be changed.  You  should 
not 
have 
to 
change 
the 
function jumpers. 
They 
should be left 
in 
their 
default condition. 
SCSI  Bus  Address Jumpers 
Your flexible disk  drive 
must 
be set 
to 
a bus address 
that 
is different from 
other 
SCSI device bus addresses already used. 
The 
factory default setting 
is address 3. 
Use  a 
pair 
of needle-nose pliers 
to 
remove 
and 
install 
the 
6·12 
Configuring Mass Storage Devices