usr/share/man/cat4/vax/hdh.0

HDH(4)            BSD Programmer's Manual (VAX Architecture)            HDH(4)

N\bNA\bAM\bME\bE
     h\bhd\bdh\bh - ACC IF-11/HDH IMP interface

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     p\bps\bse\beu\bud\bdo\bo-\b-d\bde\bev\bvi\bic\bce\be i\bim\bmp\bp
     d\bde\bev\bvi\bic\bce\be h\bhd\bdh\bh0\b0 a\bat\bt u\bub\bba\ba0\b0 c\bcs\bsr\br 1\b16\b66\b67\b74\b40\b0 v\bve\bec\bct\bto\bor\br h\bhd\bdh\bhi\bin\bnt\btr\br

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     The h\bhd\bdh\bh 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 sup-
     port to the IMP interface described in imp(4).  The configuration entry
     for the IMP must also include the _\bp_\bs_\be_\bu_\bd_\bo_\b-_\bd_\be_\bv_\bi_\bc_\be as shown above in the
     _\bS_\bY_\bN_\bO_\bP_\bS_\bI_\bS.

D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS
     h\bhd\bdh\bh%\b%d\bd:\b: n\bno\bot\bt a\bal\bli\biv\bve\be.\b.  The initialization routine was entered even though the
     device did not autoconfigure.  This indicates a system problem.

     h\bhd\bdh\bh%\b%d\bd:\b: c\bca\ban\bnn\bno\bot\bt g\bge\bet\bt c\bch\bha\ban\bn %\b%d\bd u\bub\bba\ba r\bre\bes\bso\bou\bur\brc\bce\bes\bs.\b.  Insufficient UNIBUS resources
     existed to initialize the device.  This is likely to be a shortage of
     UNIBUS mapping registers.

     h\bhd\bdh\bh%\b%d\bd:\b: L\bLI\bIN\bNE\bE U\bUP\bP.\b.  This indicates that both the HDLC and HDH protocols have
     declared the link to the IMP alive.

     h\bhd\bdh\bh%\b%d\bd:\b: L\bLI\bIN\bNE\bE D\bDO\bOW\bWN\bN.\b.  This indicates that the link to the IMP has died.

     h\bhd\bdh\bh%\b%d\bd:\b: T\bTI\bIM\bME\bEO\bOU\bUT\bT.\b.
     h\bhd\bdh\bh%\b%d\bd:\b: H\bHO\bOS\bST\bT D\bDA\bAT\bTA\bA E\bER\bRR\bRO\bOR\bR.\b.
     h\bhd\bdh\bh%\b%d\bd:\b: I\bIM\bMP\bP S\bSE\bEQ\bQU\bUE\bEN\bNC\bCE\bE E\bER\bRR\bRO\bOR\bR.\b.
     h\bhd\bdh\bh%\b%d\bd:\b: H\bHO\bOS\bST\bT S\bSE\bEQ\bQU\bUE\bEN\bNC\bCE\bE E\bER\bRR\bRO\bOR\bR.\b.  These errors indicate that an HDH protocol
     error has been detected.

     h\bhd\bdh\bh%\b%d\bd:\b: c\bca\ban\bnn\bno\bot\bt g\bge\bet\bt s\bsu\bup\bpe\ber\brv\bvi\bis\bso\bor\br c\bcm\bmn\bnd\bd b\bbu\buf\bff\bfe\ber\br.\b.  This error indicates that an
     _\bm_\bb_\bu_\bf 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.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     netintro(4)

H\bHI\bIS\bST\bTO\bOR\bRY\bY
     The h\bhd\bdh\bh driver appeared in 4.3BSD.

4.3 Berkeley Distribution        June 5, 1993                                1