LSI 53C810A User Manual
5-18
Operating Registers
Register: 0x09 (0x89)
SCSI Output Control Latch (SOCL)
Read/Write
Read/Write
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
This register is used primarily for diagnostic testing or programmed I/O
operation. It is controlled by the SCRIPTS processor when executing
SCSI SCRIPTS.
operation. It is controlled by the SCRIPTS processor when executing
SCSI SCRIPTS.
is used only when
transferring data using programmed I/O. Some bits are set (1) or cleared
(0) when executing SCSI SCRIPTS. Do not write to the register once the
LSI53C810A starts executing normal SCSI SCRIPTS.
(0) when executing SCSI SCRIPTS. Do not write to the register once the
LSI53C810A starts executing normal SCSI SCRIPTS.
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