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Definition of "channel command word" |
an “instruction” to an I/O channel. The commands consists of parameters (e.g., “operation,” “data address,” “count”) giving the channel processor information on type of I/O operation requested (e.g., “read” or “write”), where the data is to be read or written, and the number of bytes involved in the data transfer. In the IBM mainframe architecture there are six different types of channel control words: READ, READ BACKWARD, |
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