Avago Technologies LSI53C1010 - Manual (Page 96)

3-56 The SCSI SCRIPTS Processor Instruction Set
Description The chip waits for Bus Free, arbitrates for the SCSI bus, then performs
a reselection. If the chip loses arbitration it will wait again for Bus Free
and continue trying until it is successful, unless there is a bus initiated
interrupt. Once arbitration is won, the SCRIPTS processor will continue
to execute instructions until an interrupt or any instruction related to the
SCSI bus is issued. If arbitration terminates because of a bus initiated
selection or reselection, the chip will use the 32-bit jump address value
to fetch the next instruction and begin execution at that address. When
the instruction completes then the next sequential instruction is fetched
and executed. The Reselection process is illustrated in
Figure 3.16 .