problem. The J2 jumper settings control the outcome of what the com- puter will do in the event the watchdog timer is tripped.

Table 1.4: Watchdog timer output (J2)

Function

Jumper Setting

IRQ11

1

 

1-2 closed

* Reset

1

 

2-3 closed

* default setting

Note:

The interrupt output of the watchdog timer is a

 

low level signal. It will be held low until the

 

watchdog timer is reset.

1.8.4 PCI-X 33/66Mhz selection (J5 & J6)

The AIMB-744 contains a PCI-X 33/66Mhz selection that enables the PCI-X slots different modes. The default mode is PCI 33MHz which close both J5 and J6. While close J6 only the slots work in PCI 66MHz mode. To enable PCI-X 66MHz mode, please close J5 only.

Table 1.5: PCI-X 33/66MHz selection (J5&J6)

Function

Jumper Setting

*PCI 33MHz

J5-J6

PCI 66MHz

J6 Close

PCI-X 66MHz

J5 Close

13

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Image 27
Intel AIMB-744 user manual PCI-X 33/66Mhz selection J5 & J6, Watchdog timer output J2