
HOST COMMAND SET REFERENCE
UNILINK HOST
ADAPTER5–59
USER MANUAL
0 1 2 34567
Not used
1 = HIU
Allocated NM Buf
fers
1 = Secondary Is
An HIU
1 = Secondary Has Been Identified
0 = Secondary Has Not Been Identified
1 = Secondary Is On–Line
1 = Current Channel Is B
1 = Channel B
Available
1 = Channel
A
Available
0 = HIU Has Not Been
Alocated NM Buf
fers
0 = Secondary Is Not
An HIU
0 = Secondary Is Of
f–Line
0 = Current Channel Is
A
0 = Channel B Not
Available
0 = Channel
A
Not
Available
MSB LSB
Figure 5–11 Link Status Byte Bit Map
Bit–0 When set to one, indicates that the Network Manager can
communicate
with the secondary device on Channel A (Port 1).
Bit–1 When
set to one,
this bit indicates that the Network Manager can
communicate
with the secondary device on Channel B (Port 2).
Bit–2 This flag indicates which channel the Network Manager is
currently using to communicate with the secondary device.
When
set to one, the NM is communicating on Channel B. When
set
to zero, the NM is communicating on Channel A.
Bit–3 Background monitor will automatically bring secondary devices
online.
However
, these secondary devices are not available to the
host until they are connected with the CONNECT SECONDAR
Y
command. When set to one, this bit indicates that background
monitor
has brought the secondary device online.
Bit–4 When
set to one, this bit
indicates that Background Monitor has
determined that the secondary device can request network
transactions.
Bit–5 When
set
to one, this bit indicates that the secondary device is an
HIU in a multi-host network. Bit–4 must also be set to one before
the
value of this bit is valid.
Bit–6 When
set to one, this bit indicates that the HIU has been allocated
NM
buffers by the NM. It can now request network transactions.
Bit–7 Reserved.
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