Event Monitors (E1H); Switch Monitors (E3H) - Intel NetStructure ZT 5504 Manual

Event Monitors (E1h)

I/O Address: E1h
Default Value: 0x00
Size: 8 bits
Attribute: RO
Bit Description
7 RESERVED
6 ENUM-
This bit displays the value of ENUM- from backplane J1-C25. A logical 0 means that
ENUM- is not asserted on the backplane. A logical 1 means that ENUM- is asserted
on the backplane.
5:0
RESERVED

Switch Monitors (E3h)

Address Offset: E3h
Default Value: 0x80
Size: 8 bits
Attribute: RO
Bit Description
7 Flash Write-Protect Status
This bit corresponds to the status of switch SW3-2. A logical 0 means that the flash
is write-protected by SW3-2; a logical 1 means the flash is not write-protected by
SW3-2.
6 System Enable
This bit corresponds to the status of SYSEN. A logical 1 indicates that the ZT 5504
is plugged into a system slot. A logical 0 indicates that the ZT 5504 is plugged into a
peripheral slot.
5 RESERVED
4 Manufacturing Mode
This bit is used during production testing to load a default CMOS image. A logical 1
indicates manufacturing mode. A logical 0 indicates non-manufacturing mode.
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C. System Registers
75