Register: 0x0f (0x8f) – LSI 53C810A User Manual
Page 99
5-25
MSG
SCSI MSG/ Signal
2
C/D
SCSI C_D/ Signal
1
I/O
SCSI I_O/ Signal
0
These three SCSI phase status bits (MSG, C/D, and I/O)
are latched on the asserting edge of SREQ/ when
operating in either initiator or target mode. These bits are
set when the corresponding signal is active. They are
useful when operating in the low level mode.
Register: 0x0F (0x8F)
SCSI Status Two (SSTAT2)
Read Only
R
Reserved
[7:2]
LDSC
Last Disconnect
1
This bit is used in conjunction with the Connected (CON)
bit in
. It allows the user to
detect the case in which a target device disconnects, and
then some SCSI device selects or reselects the
LSI53C810A. If the Connected bit is asserted and the
LDSC bit is asserted, a disconnect is indicated. This bit
is set when the Connected bit in
is cleared. This bit is cleared when a Block
Move instruction is executed while the Connected bit in
is on.
R
Reserved
0
7
2
1
0
R
LDSC
R
x
x
x
x
x
x
1
x