IMS 5000 Series Manual page 95

Shunting
On the side of the floppy disk drive is a circuit board (Figure 3-2) which
1S
supplied by TEAC. The shunt options on the board are explained below.
pri ve Select
There should be a shunt that indicates the drive number, OSO, OS1, OS2 or
OS3. I f your system has two drives, one would have a shunt on Oso and the
other would have a shunt at OS 1.
If the system has only one floppy disk drive,
Oso would be shunted.
o
0
MX
o
0
OS3
o
0
OS2
o
0
HM
o
0
OS1
l>----O
oso
l>----O
HM
Terminating Resistor
If your system has more than one drive, the 330.fl. ±.5% terminating resistor
should be removed from all but the last drive. For example, if your system had
only one drive, the terminating resistor would stay in. If your system had two
drives, the terminating resistor would be removed from the drive shunted as OSo
and kept in the drive shunted OS 1.
Track pensity
The number of tracks per inch is indicated on the OS shunt. For
96
t.p.i.
drives, the WT side is hunted; for 48 t.p.i. drives, the ST side is shunted.
ST WT
o
0---0
OS
I
- - - - - - - -
ST
wr
OS
1_ _
0 - . 0 0 _ _
96 tr acks per inch
48 tracks per inch
IMS International
5000 Series Microcomputers/?O 1.83/page 93