APOLLO user manual
Issue G
24
Jumpers
There are three jumper blocks on the APOLLO with a total of eight user-selectable
jumper positions. These are summarized in the following table:
Jumper Description
JP1 Performs two functions:
• PCI Grant/PCI Auxiliary power selection.
• BIOS write protection.
JP2 Includes four positions, as follows:
• Two user-defined positions.
• CMOS memory reset.
• Tamper detect (TPM).
JP3 RS485/RS422 termination resistor enable/disable.
Further details are provided about each of these in the following sections.
Diagrams are used to illustrate jumper settings. For an explanation of
the symbols used, see Conventions
on page 13.
JP1 – PCI power selection and BIOS write protection
This jumper has two functions. Use it to select the function of PCI slot pin A14 and also to
enable or disable BIOS write protection. The jumper is illustrated in the following
diagram:
FWH PCI
The jumper positions are explained in more detail on the next page.
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