Method for performing sequence of actions in device connected to computer in response to specified values being written into snooped sub portions of address space
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United States of America Patent
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Jun 16, 1998
Grant Date -
N/A
app pub date -
Dec 21, 1995
filing date -
Dec 21, 1995
priority date (Note) -
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Abstract
A method of controlling an input/output (I/O) device connected to a computer to facilitate fast I/O data transfers. An address space for the I/O device is created in the virtual memory of the computer, wherein the address space comprises virtual registers that are used to directly control the I/O device. In essence, control registers and/or memory of the I/O device are mapped into the virtual address space, and the virtual address space is backed by control registers and/or memory on the I/O device. Thereafter, the I/O device detects writes to the address space. As a result, a pre-defined sequence of actions can be triggered in the I/O device by programming specified values into the data written into the mapped virtual address space.
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