RedBoot User's Guide
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iopoke

Name

iopoke -- Write I/O location

iopoke [-b location] [-1 | -2 | -4] [-v value]

Name	Type	Description	Default
-b `location`	I/O address	I/O Location.	none
-1		Access a one byte (8 bit) I/O location. Only the 8 least significant bits of value will be used	-1
-2		Access a two byte (16 bit) I/O location. Only the 16 least significant bits of value will be used	-1
-4		Access a one word (32 bit) I/O location.	-1

Writes a value to the I/O address space.

Write 0x0123 to 16 bit I/O location 0x200.

 
RedBoot> iopoke -b 0x200 -v 0x123 -2

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