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ExpMgrConfigWriteByte

You can use the ExpMgrConfigWriteByte function to write a byte to an address in PCI configuration space.



 
OSErr ExpMgrConfigWriteByte (

                     RegEntryIDPtr node,

                     LogicalAddress configAddr,

                     UInt8 value);

node: A node identifier that identifies a device node. If you specify a node identifier that isn't in the device tree, ExpMgrConfigWriteByte returns a result code of deviceTreeInvalidNodeErr.
configAddr: The configuration address (a value between 0 and 255).
value: The 8-bit value.

DESCRIPTION

The ExpMgrConfigWriteByte function writes the value of value to the address in PCI configuration space for device node node determined by offset configAddr.

RESULT CODES

`noErr`	0	No error
`deviceTreeInvalidNodeErr`	-2538	Device node not in the device tree