2.7Switches and jumpers

2.7.1 Switches

The following figure shows the location and default settings of the DIP switches on the motherboard.

DO NOT change the settings of the Reserved switches.

SW1

 

 

1.Frequency Selection

 

 

5

 

 

 

4

2.Frequency Selection

 

 

 

 

 

 

3

3.Frequency Selection

 

 

 

 

ON

 

1 2

 

 

 

 

4.Frequency Selection

 

 

 

 

 

 

5.Reserved (ON)

PR-DLSR

PR-DLSR DIP Switches

ON OFF

SW2

 

 

8

 

 

 

 

 

 

 

 

 

7

 

 

 

6

 

 

 

 

 

 

5

 

 

 

 

 

 

4

 

 

 

 

 

 

3

 

ON

 

1 2

 

 

 

 

 

 

 

 

 

 

ON OFF

1.Reserved (OFF) 2.Reserved (OFF) 3.Reserved (OFF) 4.Reserved (OFF)

5.Frequency Multiple 6.Frequency Multiple 7.Frequency Multiple 8.Frequency Multiple

1.CPU external frequency selection (SW1 Switches 1-5)

This option tells the clock generator what frequency to send the CPU. This allows the selection of the CPU’s external frequency (or Bus Clock). The BUS Clock multiplied by the Frequency Multiple equals the CPU’s internal frequency (the advertised CPU speed).

To select the CPU external frequency using the DIP switches, ensure that the JEN jumper is set to jumper mode.

SW1

 

 

 

5

 

 

 

 

 

 

4

 

 

 

3

 

 

 

ON

 

 

1 2

 

 

 

 

 

 

CPU 100MHz

PR-DLSR

PR-DLSR CPU

External Frequency Selection

2-12

Chapter 2: Hardware information