Specifications

2-3

Jumper Settings

Table 2-1: Jumper settings to select the speed of the CPU.

Jumper

CPU Speed

W4 W5 W8

75MHz External / 50MHz Internal closed closed 1-2

90MHz External / 60MHz Internal (default) open closed 2-3

100MHz External / 66MHz Internal closed open 2-3

120MHz External / 60MHz Internal open closed 2-3

133MHz External / 66MHz Internal closed open 2-3

150MHz External / 60MHz Internal open closed 2-3

167MHz External / 66MHz Internal closed open 2-3

Table 2-1: CPU Speed Selection

Table 2-2: Jumper settings to set the CPU/BUS speed ratio.

Jumper

Speed Ratio

W2 W10

2/3 (1.5X) Clock (75/90/100MHz) (default) open open

1/2 (2.0X) Clock (120MHz/133MHz) closed open

2/5 (2.5X) Clock (150MHz/167MHz) closed closed

Table 2-2: CPU Bus Speed Selection

Table 2-3: Jumper settings to set the CPU VRE setting.

Table 2-3: CPU VRE Selection

Jumper Function Settings

W14 VR (75/90MHz) (default)

VRE (100/120/133/150/166)

Open