User`s manual

siop_struc (Command Structure)
SBCSCSI/D1 B-9
B
Bit 0 -- SYNC
initiator mode
If set, the Firmware initiates negotiations for synchronous data transfers. The
SIOP initiates negotiation for the maximum offset it supports and the fastest
period possible. If a synchronous data transfer rate has been established then
the user should clear this bit to avoid unnecessary negotiations.
ASYNC
Bit
SYNC
Bit Firmware Action
0 0 does not initiate negotiations
0 1 initiates negotiations for synchronous data transfers
1 0 initiates negotiations for asynchronous data transfers
1 1 initiates negotiations for synchronous data transfers