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42 Parallel SCSI Interface Product Manual, Rev. A )
2.12.4 Transfer agreements
The transfer agreements that are in effect for various combinations of field values are described in Table 13.
Table 13: Transfer agreements
Transfer
agreement
REQ/ACK
offset
Transfer
period
factor
Transfer
width
exponent
DT_REQ IU_REQ QAS_REQ
All other
protocol
options
Default
00h Any 00h 0 0 0 0
Asynchronous
00h Any Any 0 0 Any 0
Synchronous
GE 01h GE 09h Any Any Any Any Any
ST synchronous
GE 01h GE 0Ah Any 0 0 Any Any
DT synchronous
GE 01h GE 09h 01h 1 Any Any Any
Paced
GE 01h 08h 01h 1 1 Any Any
Wide
Any Any 01h Any Any Any Any
Narrow
Any Any 00h Any Any Any Any
Data group
GE 01h Any 01h 1 0 Any Any
Information unit
GE 01h Any 01h 1 1 Any Any
ST data
GE 01h GE 0Ah Any 0 Any Any Any
DT data
GE 01h Any 01h 1 Any Any Any