DUA1:<SYS0.SYSMAINT>EHXQN.HLP;1
===============================
1 HELP
  EHXQN

        This program checks the  functionality of the  DEQNA Ethernet-QBUS
        communications interface.  It does so by utilizing the DEQNA built
        in loopback  testing  modes: Setup  mode, Internal  loopback mode,
        Internal-Extended  loopback mode, and External  loopback mode.  In
        addition, a simple network confidence test is provided to loopback
        data over a working Ethernet to a  remote system.  This is a level
        3 diagnostic.

1 DEVICE

        This program will run  only on  a MicroVAX I  computer and  with a
        Vax Diagnostic Supervisor  of version 6.12 or later.  This program
        is a level 3 diagnostic.

        This program will support the following device ONLY:

2 DEQNA

 Description:   DEQNA Ethernet-to-QBUS communications interface

 link:      HUB
 Generic name:  XQa

 Additional information:
    QBUS CSR [octal 760000-777776]<774440>

 Tested by: EHXQN

1 REQUIREMENTS

  HARDWARE:    MicroVAX I processor with 512Kb of memory
               Module loopback connector (part number 70-21489-01)

  SOFTWARE:    Vax Diagnostic Supervisor V6.12 or later

1 EVENT

  Setting event flag one causes the diagnostic to suppress the printout
  of the module's Ethernet physical station address during test 3.  The
  default setting for this event flag is "cleared."

1 QUICK

  This diagnostic does not use the VDS QUICK-pass flag.

1 SUMMARY

  This diagnostic does not produce a summary report.

1 MANUAL

  The default test section may be run on a  DEQNA module without any
  external  cabling  required.  The  internal loopback test  section
  (INTERNAL) may also be run with no special setup required.

  The external  loopback test section(EXTERNAL) requires that a DEQNA
  module loopback connector (part number 70-21489-01) be installed on
  the module before testing is started.

  The network confidence test section(NETWORK) and loopback assistant
  utility test section(LOOPBACK) require  that the unit under test be
  completely connected to a functioning Ethernet. This setup includes
  a  bulkhead  assembly, transceiver  cable, and  an installed trans-
  ceiver on an Ethernet cable.

1 SECTIONS

  There are five sections provided in  this diagnostic, the  INTERNAL
  loopback section, the EXTERNAL loopback section, the  NETWORK con-
  fidence  section, the LOOPBACK  assistant  section, and the DEFAULT
  section.

  Note  that the DEFAULT section is exactly the same as  the INTERNAL
  section in this diagnostic.

2 DEFAULT

  The  DEFAULT test section is the same as  the INTERNAL test section
  in this diagnostic.  Enter  "HELP EHXQN SECTIONS INTERNAL" for more
  information.

2 INTERNAL

  This test section consists of those tests that can be run on a  UUT
  without any special  setup.  Testing includes device register test-
  ing, boot/diagnostic ROM access testing,  interrupt sanity testing,
  Setup mode  testing, internal  loopback mode testing,  internal-ext
  ended loopback mode testing, and Ethernet address  filtering  test-
  ing.

2 EXTERNAL

  This test section consists of external mode loopback testing.  This
  test section requires that a DEQNA module  loopback connector (part
  number 70-21489-01)  be installed  on the module before  testing is
  started.

2 NETWORK

  This test section is used to perform loopback data  operations to a
  remote  system  on the  Ethernet.   Ethernet  Configuration Testing
  Protocol packets are used  to perform the  test.  This test  may be
  run on an Ethernet that is being used for normal data transfers  at
  the same  time;  it's  operation is  transparent to other  Ethernet
  stations.

  This test is intended to be a simple confidence test that  data may
  be successfully transferred  from the system  under test to another
  system.

  This test section requires that  the unit under test be  completely
  connected to a functioning Ethernet. This setup includes a bulkhead
  assembly, transceiver  cable, and  an  installed  transceiver on an
  Ethernet cable.

  Additionally, this test requires the presence  on the network  of a
  remote system that will respond  to loopback  requests directed  to
  the "loopback  assistant"  multicast  address  (CF-00-00-00-00-00).
  This requirement may be met by running the LOOPBACK test section of
  this diagnostic on another  system on the  network before  starting
  the network confidence test section on the system under test.

2 LOOPBACK

  This test section is not a test section,  per se.  It is a  utility
  that allows the current node to function  as a loopback  assistant,
  responding to the "loopback assistant"  multicast  address.  It  is
  for use with the network confidence test section  (NETWORK) in  the
  situation where no loopback assistant is found on the network.

  To use this test section in conjunction with the network confidence
  test section, you must first start the  loopback test  section run-
  ning on one system in the network and then start  the network  test
  section running on the system you wish to test.  After the  network
  confidence test  section completes,  you will then  be required  to
  manually stop the loopback test section running on the remote node.

  This test section requires that  the unit under test be  completely
  connected to a functioning Ethernet. This setup includes a bulkhead
  assembly, transceiver  cable, and  an  installed  transceiver on an
  Ethernet cable.

1 ATTACH

  The following is an example of how to run this diagnostic:

  DS> LOAD EHXQN                  ; load the diagnostic
  DS> ATTACH DEQNA                ; attach the DEQNA
  Device link? HUB                ; the option is linked to HUB
  Device name? XQA                ; the option is named 'XQA'
  CSR? 774440                     ; the CSR address is 774440(8)
  DS> SELECT XQA                  ; select the device to test
  DS> START                       ; start the internal tests

