System Registers; System Register Definitions - Intel NetStructure ZT 5504 Manual

C. System Registers
The ZT 5504 provides several system registers to control and monitor a variety of functions.
Normally, only the system BIOS uses these registers, but they are documented here for
application use as needed. Take care when modifying the contents of these registers, as the
system BIOS may be relying on the state of the bits under their control.

System Register Definitions

The System Registers are accessible as follows:
I/O Address Register Name
78h
79h
7Bh
80h
E1h
E3h
E4h
E5h
E6h
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Default Value
Flash Control 0x00
Watchdog 0x00
J1 IPMB Control 0x00
Port 80 0x00
Event Monitors 0x00
Switch Monitors 0x00
Geographic Address 0x00
Control Bits 0x00
J5 SMBus Enable 0x00
Access Size
R/W 8 bits
R/W 8 bits
R/W 8 bits
WO 8 bits
RO 8 bits
RO 8 bits
RO 8 bits
WO 8 bits
WO 8 bits
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