Host adaptor comprising a status switching circuit which couples an output line to a function input line in response to a function enable line signal
First Claim
1. A method of operating a status switching circuit having a plurality of input lines, an output line and a disable line, said method comprising;
- driving a signal on a first input line in said plurality of input lines based on the value of an input storage unit in a status storage element;
detecting an active signal on said disable line;
setting the value of said input storage unit in said status storage element;
disconnecting an output line of said status switching circuit from every one of said input lines;
detecting an inactive signal on said disable line; and
connecting said output line to said first input line.
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Accused Products
Abstract
A host adapter for transferring data between a system bus and an input/output (I/O) bus is implemented as an integrated circuit having a data transfer circuit and a status indicator circuit. The status indicator circuit selectively supplies one of a number of status signals from the data transfer circuit as a signal on a status indicator terminal of the host adapter. Therefore, a light emitting diode connected to the status indicator terminal indicates in real time the status of data transfer, such as usage of the system bus, or I/O bus, or execution time of one or more instructions by the host adapter.
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Citations
9 Claims
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1. A method of operating a status switching circuit having a plurality of input lines, an output line and a disable line, said method comprising;
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driving a signal on a first input line in said plurality of input lines based on the value of an input storage unit in a status storage element; detecting an active signal on said disable line; setting the value of said input storage unit in said status storage element; disconnecting an output line of said status switching circuit from every one of said input lines; detecting an inactive signal on said disable line; and connecting said output line to said first input line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification