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1.1 root 1: .\" Copyright (c) 1983 The Regents of the University of California.
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18: .\" @(#)acc.4 6.3 (Berkeley) 6/23/90
19: .\"
20: .TH ACC 4 "June 23, 1990"
21: .UC 5
22: .SH NAME
23: acc \- ACC LH/DH IMP interface
24: .SH SYNOPSIS
25: .B "pseudo-device imp"
26: .br
27: .B "device acc0 at uba0 csr 167600 vector accrint accxint"
28: .SH DESCRIPTION
29: The
30: .I acc
31: device provides a Local Host/Distant Host
32: interface to an IMP. It is normally used when participating
33: in the DARPA Internet. The controller itself is not accessible
34: to users, but instead provides the hardware support to the IMP
35: interface described in
36: .IR imp (4).
37: When configuring, the
38: .I imp
39: pseudo-device must also be included.
40: .SH DIAGNOSTICS
41: .BR "acc%d: not alive" .
42: The initialization routine was entered even though the device
43: did not autoconfigure. This indicates a system problem.
44: .PP
45: .BR "acc%d: can't initialize" .
46: Insufficient UNIBUS resources existed to initialize the device.
47: This is likely to occur when the device is run on a buffered
48: data path on an 11/750 and other network interfaces are also
49: configured to use buffered data paths, or when it is configured
50: to use buffered data paths on an 11/730 (which has none).
51: .PP
52: .BR "acc%d: imp doesn't respond, icsr=%b" .
53: The driver attempted to initialize the device, but the IMP
54: failed to respond after 500 tries. Check the cabling.
55: .PP
56: .BR "acc%d: stray xmit interrupt, csr=%b" .
57: An interrupt occurred when no output had previously been started.
58: .PP
59: .BR "acc%d: output error, ocsr=%b, icsr=%b" .
60: The device indicated a problem sending data on output.
61: .PP
62: .BR "acc%d: input error, csr=%b" .
63: The device indicated a problem receiving data on input.
64: .PP
65: .BR "acc%d: bad length=%d" .
66: An input operation resulted in a data transfer of less than
67: 0 or more than 1008 bytes of
68: data into memory (according to the word count register).
69: This should never happen as the maximum size of a host-IMP
70: message is 1008 bytes.
71: .SH "SEE ALSO"
72: netintro(4)
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