1*47674Scael.\" Copyright (c) 1983, 1991 The Regents of the University of California. 236756Sbostic.\" All rights reserved. 324222Smckusick.\" 443582Strent.\" %sccs.include.redist.man% 536756Sbostic.\" 6*47674Scael.\" @(#)hdh.4 6.4 (Berkeley) 03/27/91 736756Sbostic.\" 8*47674Scael.Dd 9*47674Scael.Dt HDH 4 vax 10*47674Scael.Os BSD 4.3 11*47674Scael.Sh NAME 12*47674Scael.Nm hdh 13*47674Scael.Nd 14*47674Scael.Tn ACC 15*47674Scael.Tn IF-11/HDH 16*47674Scael.Tn IMP 17*47674Scaelinterface 18*47674Scael.Sh SYNOPSIS 19*47674Scael.Cd "pseudo-device imp" 20*47674Scael.Cd "device hdh0 at uba0 csr 166740 vector hdhintr" 21*47674Scael.Sh DESCRIPTION 2224222SmckusickThe 23*47674Scael.Nm hdh 24*47674Scaeldevice provides an 25*47674Scael.Tn HDLC 26*47674ScaelHost 27*47674Scael.Pq Tn HDH 28*47674Scaelinterface to an 29*47674Scael.Tn IMP . 30*47674ScaelIt is normally used when participating 31*47674Scaelin the 32*47674Scael.Tn DARPA 33*47674ScaelInternet. The controller itself is not accessible 34*47674Scaelto users, but instead provides the hardware support to the 35*47674Scael.Tn IMP 3624222Smckusickinterface described in 37*47674Scael.Xr imp 4 . 38*47674ScaelThe configuration entry for the 39*47674Scael.Tn IMP 40*47674Scaelmust also include the 41*47674Scael.Em pseudo-device 42*47674Scaelas shown above in the 43*47674Scael.Sx SYNOPSIS . 44*47674Scael.Sh DIAGNOSTICS 45*47674Scael.Bl -diag 46*47674Scael.It hdh%d: not alive. 4724222SmckusickThe initialization routine was entered even though the device 4824222Smckusickdid not autoconfigure. This indicates a system problem. 49*47674Scael.Pp 50*47674Scael.It hdh%d: cannot get chan %d uba resources. 51*47674ScaelInsufficient 52*47674Scael.Tn UNIBUS 53*47674Scaelresources existed to initialize the device. 54*47674ScaelThis is likely to be a shortage of 55*47674Scael.Tn UNIBUS 56*47674Scaelmapping registers. 57*47674Scael.Pp 58*47674Scael.It hdh%d: LINE UP. 59*47674ScaelThis indicates that both the 60*47674Scael.Tn HDLC 61*47674Scaeland 62*47674Scael.Tn HDH 63*47674Scaelprotocols have declared the 64*47674Scaellink to the 65*47674Scael.Tn IMP 66*47674Scaelalive. 67*47674Scael.Pp 68*47674Scael.It hdh%d: LINE DOWN. 69*47674ScaelThis indicates that the link to the 70*47674Scael.Tn IMP 71*47674Scaelhas died. 72*47674Scael.Pp 73*47674Scael.It hdh%d: TIMEOUT. 74*47674Scael.It hdh%d: HOST DATA ERROR. 75*47674Scael.It hdh%d: IMP SEQUENCE ERROR. 76*47674Scael.It hdh%d: HOST SEQUENCE ERROR. 77*47674ScaelThese errors indicate that an 78*47674Scael.Tn HDH 79*47674Scaelprotocol error has been detected. 80*47674Scael.Pp 81*47674Scael.It hdh%d: cannot get supervisor cmnd buffer. 8224222SmckusickThis error indicates that an 83*47674Scael.Em mbuf 84*47674Scaelcould not be allocated to send a command to the 85*47674Scael.Tn IF-11/HDH . 86*47674Scael.El 87*47674Scael.Pp 8824222SmckusickAny other error message from hdh%d: indicates a serious error 89*47674Scaeldetected by either the driver or the 90*47674Scael.Tn IF-11/HDH 91*47674Scaelfirmware. 92*47674Scael.Sh SEE ALSO 93*47674Scael.Xr netintro 4 94*47674Scael.Sh HISTORY 95*47674ScaelThe 96*47674Scael.Nm 97*47674Scaeldriver appeared in 98*47674Scael.Bx 4.3 . 99