1*61592Sbostic.\" Copyright (c) 1983, 1991, 1993 2*61592Sbostic.\" The Regents of the University of California. All rights reserved. 320704Smckusick.\" 443582Strent.\" %sccs.include.redist.man% 520704Smckusick.\" 6*61592Sbostic.\" @(#)acc.4 8.1 (Berkeley) 06/05/93 736756Sbostic.\" 847674Scael.Dd 947674Scael.Dt ACC 4 vax 1047674Scael.Os BSD 4.2 1147674Scael.Sh NAME 1247674Scael.Nm acc 1347674Scael.Nd 1447674Scael.Tn ACC LH/DH IMP 1547674Scaelinterface 1647674Scael.Sh SYNOPSIS 1747674Scael.Cd pseudo-device imp "device acc0 at uba0 csr 167600 vector accrint accxint" 1847674Scael.Sh DESCRIPTION 1920704SmckusickThe 2047674Scael.Nm acc 2120704Smckusickdevice provides a Local Host/Distant Host 2247674Scaelinterface to an 2347674Scael.Tn IMP . 2447674ScaelIt is normally used when participating 2547674Scaelin the 2647674Scael.Tn DARPA 2747674ScaelInternet. The controller itself is not accessible 2847674Scaelto users, but instead provides the hardware support to the 2947674Scael.Tn IMP 3020704Smckusickinterface described in 3147674Scael.Xr imp 4 . 3247674ScaelThe configuration entry for the 3347674Scael.Xr imp 3447674Scaelmust also include the 3547674Scael.Em pseudo-device 3647674Scaelas shown above. 3747674Scael.Sh DIAGNOSTICS 3847674Scael.Bl -diag 3947674Scael.It acc%d: not alive. 4020704SmckusickThe initialization routine was entered even though the device 4120704Smckusickdid not autoconfigure. This indicates a system problem. 4247674Scael.Pp 4347674Scael.It acc%d: can't initialize. 4420704SmckusickInsufficient UNIBUS resources existed to initialize the device. 4520704SmckusickThis is likely to occur when the device is run on a buffered 4620704Smckusickdata path on an 11/750 and other network interfaces are also 4720704Smckusickconfigured to use buffered data paths, or when it is configured 4820704Smckusickto use buffered data paths on an 11/730 (which has none). 4947674Scael.Pp 5047674Scael.It acc%d: imp doesn't respond, icsr=%b. 5147674ScaelThe driver attempted to initialize the device, but the 5247674Scael.Tn IMP 5320704Smckusickfailed to respond after 500 tries. Check the cabling. 5447674Scael.Pp 5547674Scael.It acc%d: stray xmit interrupt, csr=%b. 5620704SmckusickAn interrupt occurred when no output had previously been started. 5747674Scael.Pp 5847674Scael.It acc%d: output error, ocsr=%b, icsr=%b. 5920704SmckusickThe device indicated a problem sending data on output. 6047674Scael.Pp 6147674Scael.It acc%d: input error, csr=%b. 6220704SmckusickThe device indicated a problem receiving data on input. 6347674Scael.Pp 6447674Scael.It acc%d: bad length=%d. 6520704SmckusickAn input operation resulted in a data transfer of less than 6620704Smckusick0 or more than 1008 bytes of 6720704Smckusickdata into memory (according to the word count register). 6847674ScaelThis should never happen as the maximum size of a 6947674Scael.Pf host- Tn IMP 7020704Smckusickmessage is 1008 bytes. 7147674Scael.El 7247674Scael.Sh SEE ALSO 7347674Scael.Xr netintro 4 7447674Scael.Sh HISTORY 7547674ScaelThe 7647674Scael.Nm 7747674Scaelinterface appeared in 7847674Scael.Bx 4.2 . 79