Avago Technologies LSI53C1010 - Manual (Page 258)

11-8 Using the SCRIPTS Processor in Target Applications
Figure 11.7 SCRIPTS Source Code–CDB Functions
command_phase:
move from cmd_buf, with cmd ;get SCSI command
move scntl1 & 0xdf to scntl1 ;turns on the halt on parity error or atn
jump rel(read), if 0x08 ;jump to set up read (6-byte read)
int write_access_medium, if 0x0a ;interrupt to set up write (6-byte write)
int seek_command, if 0x0b ;interrupt to perform seek
int seek_command, if 0x2b ;interrupt to perform seek
jump rel(read), if 0x28 ;jump to set up read (10-byte read)
int write_access_medium, if 0x2a ;interrupt to set up write (10-byte write)
jump rel(tur), if 0x00 ;jump to test unit ready
int request_sense_command,if 0x03 ;interrupt to set up request sense command
int inquiry_command, if 0x12 ;interrupt to set up inquiry command
int read_capacity_command,if 0x25 ;interrupt to set up read capacity command
int start_stop_command, if 0x1b ;interrupt to set up start/stop unit command
jump rel(tur), if 0x2f ;verify command, go to tur
jump rel(reserve_unit), if 0x16 ;jump to reserve unit
jump rel(release_unit), if 0x17 ;jump to release unit
int send_diagnostic, if 0x1d ;interrupt to set up send diagnostic
int format_unit, if 0x04 ;interrupt to set up format unit
int illegal_cmd ;interrupt on any other command
In Message Out phase, the initiator moves other types of messages,
such as wide or synchronous negotiation, or NOPs. See
Figure 11.8 for
an example.
Figure 11.8 SCRIPTS Source Code–Message Out Phase
If the chip receives a byte in the message phase indicating an extended
message, then it jumps to these commands as shown in
Figure 11.9 .
msg_out_phase:
return, if not atn ;return if atn gone
move from msg_out_buf, with msg_out ;get message byte
jump rel(extended_msg), if 0x01 ;jump if extended message
jump rel(abort), if 0x06 ;jump if abort message
jump rel(msg_out_phase), if 0x08 ;jump back if nop message
int non_handled_msg ;interrupt if can't handle message