HDH
Section: Devices and Network Interfaces (4)
Updated: vax
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BSD mandoc
BSD 4.3
NAME
hdh
- ACC
IF-11/HDH
IMP
interface
SYNOPSIS
pseudo-device imp
device hdh0 at uba0 csr 166740 vector hdhintr
DESCRIPTION
The
hdh
device provides an
HDLC
Host
(HDH
)
interface to an
IMP
It is normally used when participating
in the
DARPA
Internet. The controller itself is not accessible
to users, but instead provides the hardware support to the
IMP
interface described in
imp(4).
The configuration entry for the
IMP
must also include the
pseudo-device
as shown above in the
Sx SYNOPSIS .
DIAGNOSTICS
- hdh%d: not alive.
-
The initialization routine was entered even though the device
did not autoconfigure. This indicates a system problem.
- hdh%d: cannot get chan %d uba resources.
-
Insufficient
UNIBUS
resources existed to initialize the device.
This is likely to be a shortage of
UNIBUS
mapping registers.
- hdh%d: LINE UP.
-
This indicates that both the
HDLC
and
HDH
protocols have declared the
link to the
IMP
alive.
- hdh%d: LINE DOWN.
-
This indicates that the link to the
IMP
has died.
- hdh%d: TIMEOUT.
-
- hdh%d: HOST DATA ERROR.
-
- hdh%d: IMP SEQUENCE ERROR.
-
- hdh%d: HOST SEQUENCE ERROR.
-
These errors indicate that an
HDH
protocol error has been detected.
- hdh%d: cannot get supervisor cmnd buffer.
-
This error indicates that an
mbuf
could not be allocated to send a command to the
IF-11/HDH
Any other error message from hdh%d: indicates a serious error
detected by either the driver or the
IF-11/HDH
firmware.
SEE ALSO
netintro(4)
HISTORY
The
driver appeared in
BSD 4.3
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- DIAGNOSTICS
-
- SEE ALSO
-
- HISTORY
-
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