Compaq AlphaServer DS20 Manual de servicio descargar pdf (Pagina 33)

System Overview 1-23

Figure 1-12 shows the location of the switchpacks and Table 1-2 and Table 1-3

describe what each switch controls.

Table 1-2 Switchpack 2

Switch Description

1 Fail safe boot. Off (default) = normal boot. On = boot the fail safe booter

2 Reserved. Must be off.

3 Reserved. Must be off.

4 Reserved. Must be off.

Switches 5, 6, and 7 create a field that defines the speed at which the cross

bar switch runs. Switches 5 and 6 are on and switch 7 is off.

8 AlphaBIOS Password bypass: Off (default) = Normal operation;

On = Bypass AlphaBIOS password

Table 1-3 Switchpack 3

Switch Description

1 Reserved. Must be off.

2 Reserved. Must be off.

3 Reserved. Must be off.

4 Reserved. Must be on.

5 Reserved. Must be off.

6 Reserved. Must be off.

7 Reserved. Must be off.

8 Flash write protect: Off (default) = Write enable the flash ROM

On = Write disable the flash ROM

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Compaq AlphaServer DS20 Manual de servicio Pagina 33