Supero SUPER 370DL3, User Manual

Page: 47 / 94

Chapter 2: Installation
2-15
Installation
2-7 DIP Switch Settings
DIP Switch 1:
Core/Bus Ratio
Two "DIP" switches labeled SW1
a n d S W 2 a r e l o c a t e d o n t h e
S2DLE/370DL6/370DL3/370DLE.
Each has four individual switches.
The four on Dip Switch 1 are used
to set the core/bus ratio.
The example on the right will show
you which CPU Core/Bus Ratio to
use. The general rule is to divide
the CPU speed by the bus speed.
If you have a 550 MHz CPU, divid-
ing it by a 100 Mhz front side bus
will give you a CPU Core/BUS Ra-
tio of 5.5. After determining the
CPU Core/Bus Ratio, refer to Table
2-22 for the correct settings of DIP
Switch 1.
Note:
Most Intel processors have a fixed
Core/Bus ratio that will overwrite
the setting of DIP Switch
1.
DIP Switch 2
Only DIP switch 1 is functional at
this time. DIP switch 2 should be
left as set by the manufacturer.
S W 1
# 3
O N
O N
O F F
O F F
O F F
O F F
O N
O N
O N
O N
O F F
O F F
O F F
C P U C o r e /
B u s R a t i o
2 . 0
3 . 0
4 . 0
4 . 5
5 . 0
5 . 5
6 . 0
6 . 5
7 . 0
7 . 5
8 . 0
8 . 5
9 . 0
S W 1
# 1
O N
O N
O N
O F F
O N
O F F
O N
O F F
O N
O F F
O N
O F F
O N
S W 1
# 2
O N
O F F
O N
O N
O F F
O F F
O N
O N
O F F
O F F
O N
O N
O F F
S W 1
# 4
O N
O N
O N
O N
O N
O N
O F F
O F F
O F F
O F F
O F F
O F F
O F F
Table 2-22
CPU Core/Bus Ratio Selection
(DIP Switch1)
550 (MHz) / 100 (MHz) = 5.5
CPU Speed / Bus Freq. = Ratio