2.2.17 Chained Block Moves

Since the LSI53C875A has the capability to transfer 16-bit wide SCSI data, a unique situation occurs when dealing with odd bytes. The Chained Move (CHMOV) SCRIPTS instruction along with the Wide SCSI Send (WSS) and Wide SCSI Receive (WSR) bits in the SCSI Control Two (SCNTL2) register are used to facilitate these situations. The Chained Block Move instruction is illustrated in Figure 2.7.

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Functional Description

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LSI 53C875A technical manual Chained Block Moves