Secondary I/O bus with expanded slot capacity and hot plugging capability
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United States of America Patent
Stats
-
Feb 23, 1999
Grant Date -
N/A
app pub date -
May 24, 1996
filing date -
May 24, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A computer system is provided which supports an increase in the number of pluggable cards on the secondary I/O bus by using driver/receiver modules and direction control logic in place of more complex and more expensive bus to bus bridges. The number of pluggable cards on the I/O bus in a computer system is limited by the electrical loading of each card and the frequency of operations on the bus. Reducing the bus frequency provides more signal propagation time. The added signal propagation time supports the extension of the bus by driver/receiver modules and logic which controls the direction the driver/receiver modules drive the bus signals. Further, the driver/receiver modules support changing the hardware configuration of the system by adding or removing an I/O card without the need to cease data processing activity for the entire computer.
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