Avago Technologies LSI53C1010 - Manual (Page 264)

11-14 Using the SCRIPTS Processor in Target Applications
The write_reconnect label, Figure 11.22 , operates the same as
read_reconnect .
Figure 11.22 SCRIPTS Source Code–write_reconnect Label
The reserve_unit label, Figure 11.23 , sets a reservation flag, gets the
ID of the initiator that sent the command, jumps to Test Unit Ready, and
completes the command.
Figure 11.23 SCRIPTS Source Code–reserve_unit Label
The release_unit command, Figure 11.24 , clears the reserved flag and
goes to Test Unit Ready.
Figure 11.24 SCRIPTS Source Code–release_unit Command
The abort label turns off the halt on parity or ATN bit, and disconnects
from the bus, as shown in Figure 11.25 . The chip executes this command
when it receives an Abort message for the command in process. The
interrupt service routine then cleans up the job.
write_reconnect:
reselect from selector_id, rel(alt_got_selected) ;reselect the initiator
move scntl1 & 0xdf to scntl1
;turns on the halt on parity
;error or atn
move from identify_msg_in_buf, with msg_in ;move in identify message
move scratchb1 to sfbr ;get the 'finished' flag
jump rel(tur) if 0x00 ;jump to status and message
;if transfer complete
jump rel(write_return) ;jump to get data
reserve_unit:
move 0x01 to scratchb2 ;set 'reserved' in reservation flag
move ssid & 0x7f to sfbr ;get the ID of who reserved us
move sfbr to scratchb3 ;move ID into storage buffer
jump rel(tur) ;go to status and message
release_unit:
move 0x00 to scratchb2 ;set 'not reserved' in reservation flag
jump rel(tur) ;go to status and message