Avago Technologies LSI53C1000R - Manual (Page 149)

SCSI Registers 4-37
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
Register: 0x09
SCSI Output Control Latch (SOCL)
Read/Write
This register is used primarily for diagnostic testing or programmed I/O
operation. It is controlled by the SCRIPTS processor when executing
SCSI SCRIPTS.
SCSI Output Control Latch (SOCL) is used only when
transferring data using programmed I/O. Some bits are set or cleared
when executing SCSI SCRIPTS. Do not write to the register once the
LSI53C1000R starts executing normal SCSI SCRIPTS.
REQ Assert SCSI REQ/ Signal 7
ACK Assert SCSI ACK/ Signal 6
BSY Assert SCSI BSY/ Signal 5
SEL Assert SCSI SEL/ Signal 4
ATN Assert SCSI ATN/ Signal 3
MSG Assert SCSI MSG/ Signal 2
C_D Assert SCSI C_D/ Signal 1
I_O Assert SCSI I_O/ Signal 0
7 6 5 4 3 2 1 0
REQ ACK BSY SEL ATN MSG C_D I_O
0 0 0 0 0 0 0 0