1*47674Scael.\" Copyright (c) 1983, 1991 Regents of the University of California. 2*47674Scael.\" All rights reserved. 320708Smckusick.\" 4*47674Scael.\" %sccs.include.redist.man% 520708Smckusick.\" 6*47674Scael.\" @(#)css.4 6.2 (Berkeley) 03/27/91 7*47674Scael.\" 8*47674Scael.Dd 9*47674Scael.Dt CSS 4 vax 10*47674Scael.Os BSD 4.2 11*47674Scael.Sh NAME 12*47674Scael.Nm css 13*47674Scael.Nd 14*47674Scael.Tn DEC IMP-11A LH/DH IMP 15*47674Scaelinterface 16*47674Scael.Sh SYNOPSIS 17*47674Scael.Cd "pseudo-device imp device css0 \&at uba0 csr 167600 flags 10 vector cssrint cssxint" 18*47674Scael.Sh DESCRIPTION 1920708SmckusickThe 20*47674Scael.Nm css 2120708Smckusickdevice provides a Local Host/Distant Host 22*47674Scaelinterface to an 23*47674Scael.Tn IMP . 24*47674ScaelIt is normally used when participating 25*47674Scaelin the 26*47674Scael.Tn DARPA 27*47674ScaelInternet. The controller itself is not accessible 28*47674Scaelto users, but instead provides the hardware support to the 29*47674Scael.Tn IMP 3020708Smckusickinterface described in 31*47674Scael.Xr imp 4 . 32*47674ScaelThe configuration entry for the 33*47674Scael.Xr imp 34*47674Scaelmust also include the 35*47674Scael.Em pseudo-device 36*47674Scaelas shown above. 37*47674Scael.Sh DIAGNOSTICS 38*47674Scael.Bl -diag 39*47674Scael.It css%d: not alive. 4020708SmckusickThe initialization routine was entered even though the device 4120708Smckusickdid not autoconfigure. This is indicates a system problem. 42*47674Scael.Pp 43*47674Scael.It css%d: can't initialize. 44*47674ScaelInsufficient 45*47674Scael.Tn UNIBUS 46*47674Scaelresources existed to initialize the device. 4720708SmckusickThis is likely to occur when the device is run on a buffered 4820708Smckusickdata path on an 11/750 and other network interfaces are also 4920708Smckusickconfigured to use buffered data paths, or when it is configured 5020708Smckusickto use buffered data paths on an 11/730 (which has none). 51*47674Scael.Pp 52*47674Scael.It css%d: imp doesn't respond, icsr=%b. 53*47674ScaelThe driver attempted to initialize the device, but the 54*47674Scael.Tn IMP 5520708Smckusickfailed to respond after 500 tries. Check the cabling. 56*47674Scael.Pp 57*47674Scael.It css%d: stray output interrupt csr=%b. 5820708SmckusickAn interrupt occurred when no output had previously been started. 59*47674Scael.Pp 60*47674Scael.It css%d: output error, ocsr=%b icsr=%b. 6120708SmckusickThe device indicated a problem sending data on output. 62*47674Scael.Pp 63*47674Scael.It css%d: recv error, csr=%b. 6420708SmckusickThe device indicated a problem receiving data on input. 65*47674Scael.Pp 66*47674Scael.It css%d: bad length=%d. 6720708SmckusickAn input operation resulted in a data transfer of less than 6820708Smckusick0 or more than 1008 bytes of 6920708Smckusickdata into memory (according to the word count register). 70*47674ScaelThis should never happen as the maximum size of a 71*47674Scael.Pf host- Tn IMP 7220708Smckusickmessage is 1008 bytes. 73*47674Scael.El 74*47674Scael.Sh HISTORY 75*47674ScaelThe 76*47674Scael.Nm 77*47674Scaelinterface appeared in 78*47674Scael.Bx 4.2 . 79