define hrqthe hold demand output requests the


Define HRQ?

The hold demand output requests the access of the system bus. In non- cascaded 8257 systems, this is linked with HOLD pin of CPU. In cascade mode, this pin of a slave is linked with a DRQ input line of the master 8257, whereas that of the master is linked with HOLD input of the CPU.

 

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Electrical Engineering: define hrqthe hold demand output requests the
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