LSI 53C875A - Manual (Page 66)

2-44 Functional Description
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 .