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  1. /nof
  2. July 12, 1986Number 140
  3.  
  4. ISOLATING NMI ERRORS IN THE NOVELL 286A AND 286B SERVERS
  5.  
  6.  
  7.  
  8.  
  9. DISCLAIMER
  10.  
  11.  
  12. Novell, Inc. makes no representation or warranties with respect to
  13. the accuracy or completeness of the information contained in this
  14. technical bulletin.  The solutions to NMI errors that follow have been
  15. found to work in controlled laboratory conditions and may or may
  16. not offer a valid resolution to any question or problem dealing with
  17. NMI errors.  Furthermore, the hardware and software specifications
  18. and configurations that follow may or may not be accurate or
  19. complete.  Novell, Inc. reserves the right to make changes to any or
  20. all NetWare software, at any time, without obligation to notify any
  21. person or entity of such changes.
  22.  
  23.     The NMI error is becoming one of the most commonly reported
  24. problems during a 286 server installation.  Novell has isolated 3
  25. causes of this error, 1) bent spring clip in the 80286 socket, 2) bad
  26. add-in-expansion memory, and 3) conflicting I/O and memory
  27. addressing in the server.  All 3 of these problems can produce the
  28. error in an intermittent manner, although the first two are the most
  29. likely to produce the error in a manner that allows the machine to
  30. run for awhile and then fail.
  31.  
  32.     The 80286 socket has a spring clip that is easily bent under the
  33. 80286 during installation of the 80286.  An inspector can tell if this
  34. condition has occurred by shinning a flashlight at the socket and
  35. examining the corner of the socket where the clip is located to see
  36. if it is visible.  If the top of the clip is not visible with the        
  37. visual inspection, the 80286 needs to be removed, the clip bent back
  38. out from underneath, and the 80286 correctly installed.  The sockets
  39. functionality will not be harmed if the clip breaks and the free
  40. pieces are removed.  If the clip does break care must be taken to
  41. insure proper seating of the 80286.
  42.  
  43.     Most of the expansion memory boards on the market for the
  44. IBM AT and look-alike's are not designed for operation at 8
  45. megahertz.  AST has stated their piggy back card for the Advantage
  46. Card will not work reliably at 8 megahertz (they have also said the
  47. RAM PAGE board has been fixed with the latest revisions to allow 8
  48. meg. operation).  Any machine getting NMI errors should have all its
  49. expansion memory boards removed to see if they are the source of
  50. the error.
  51.  
  52.     The most common source of regular NMI errors during the
  53. initial set-up of a 286 server appears to be conflicting I/O and
  54. memory addresses.  The GENOS program only knows about the
  55. memory configurations of the boards whose respective device drivers
  56. are selected.  It knows nothing about the memory locations of other
  57. boards in the server, including the ones produced by Novell such as
  58. the disk coprocessor board.  There can be no physical decoding
  59. overlaps of memory or I/O space in the server if it is to operate
  60. properly.  The following chart of board characteristics may be useful
  61. in determining if there are memory conflicts during configuration of
  62. the server.  It would be wise to obtain this information and record it
  63. in the following chart format for any board being installed in a
  64. server before installing it.
  65.  
  66.     The chart memory references are in the format
  67. (SEGMENT):(INSTRUCTION POINTER)-(DECODE SPACE).  A decode
  68. address given as D000:0000-07FF decodes from D0000 through D07FF. 
  69. All addresses in the chart are given in hex.
  70.  
  71.  
  72. Common Devices and Their Configurations
  73.  
  74. DEVICE            INT            I/O DECODE (h)   MEM DECODE    DMA
  75.  
  76. Com1                4            3F8-3FF             -            -
  77. Com2                3            2F8-2FF             -            -
  78. LPT1                7            378-37F             -            -
  79. LPT2 (The XTcontroller cannot be
  80. used with LPT2)    5            278-27F              -            -
  81. If LPT3 exists then
  82.    LPT1            7            3BC-3BE              -            -
  83.    LPT2            5            378-37A              -            -
  84.    LPT3            -            278-27A              -            -
  85. XT Controller      5            320-32F         C800:0000-3FFF    3
  86. AT Controller     14            1F0-1F8              -            -
  87.                                 170-177
  88. Floppy controller  6            1F0-1F8              -            2
  89.                                 3F0-3F7
  90. Tape Controller    5            280-28F              -            3
  91. Novell Disk
  92. Coprocessor        11           #1 340-347           -            -
  93.                                 #2 348-34F
  94. Novell SCSI Adapter 2, 3        340-343        D000:0000-7FFF   1, 3
  95.                 or 5                            (enhanced only) or
  96.                                                         none
  97. E.G.A.             2            3C0-3CF        A000:0000-1FFFE    0
  98.                                                       or
  99.                                                B000:0000-7FFF
  100.                                                       or
  101.                                                B800:0000-7FFF
  102. Mono Adapter        -           3B0-3BF        B000:0000-7FFF     0
  103. Color Graphics      -           3D0-3DF        B800:0000-7FFF     0
  104. Hercules Mono
  105.  (286A server)      -           3B4-3BF        B000:0000-7FFF     -
  106.                                                B800:0000-7FFF
  107. DEVICE            INT        I/O DECODE (h)     MEM DECODE       DMA
  108.  
  109. IBM SDLC            4 or     BiSync 1 3A0-3AF    -                1
  110.                     3        BiSync 2 380-38F
  111. AST clock/cal.      -        2C0-2C7             -                -
  112. Gnet Remote Boot    -        -                  D000:0000-3FFF    -
  113.  
  114.                 
  115.  
  116.                 Novell GENSH & GENOS Device Drivers   
  117.  
  118. DEVICE            INT        I/O DECODE (h)   MEM DECODE       DMA
  119.  
  120. Generic NetBIOS (5ch)
  121.     #0            2                             -                3(2)        
  122.     #1            3          368-36B            -                3
  123. Allen-Bradley Vista
  124. LAN/PC
  125.     #0            2          2E0-2EF            D000:0000-FFFF   -  
  126.     #1            3          3E0-3EF            E000:0000-FFFF   -  
  127.     #2            3          3E0-3EF            C000:0000-FFFF   -(3)
  128. Nestar PLAN 2000
  129.     #0            2          -                  D200:0000-0FFF   -  
  130.     #1            3          -                  D000:0000-0FFF   -
  131. Standard Microsystems
  132. ARCNET
  133.     #0            2          2E0-2EF            D000:0000-3FFF   -
  134.     #1            2          2F0-2EF            D000:0000-3FFF   -  
  135.     #2            3          2E0-2EF            D000:0000-3FFF   -  
  136.     #3            3          2F0-2EF            D000:0000-3FFF   -  
  137.     #4            4          2E0-2EF            D000:0000-3FFF   -  
  138.     #5            4          2F0-2EF            D000:0000-3FFF   -
  139.  
  140. DEVICE            INT        I/O DECODE (h)     MEM DECODE       DMA
  141.     #6            5          2E0-2EF            D000:0000-3FFF   -  
  142.     #7            5          2F0-2FF            D000:0000-3FFF   -  
  143.     #8            7          2E0-2EF            D000:0000-3FFF   -  
  144.     #9            7          2F0-2FF            D000:0000-3FFF   -  
  145.     #10           2          300-30F            C000:0000-3FFF   -  
  146.     #11           3          2F0-2FF            C000:0000-3FFF   -  
  147.     #12           4          2E0-2EF            C000:0000-3FFF   -  
  148.     #13           5          2E0-2EF            C000:0000-3FFF   -  
  149.     #14           7          300-30F            D000:0000-3FFF   -  
  150.     #15           2          300-30F            E000:0000-3FFF   -(3)  
  151.     #16           3          2F0-2EF            E000:0000-3FFF   -(3)
  152.     #17           4          2E0-2EF            D000:0000-3FFF   -
  153.  
  154. Santa Clara PCnet
  155.     #0            2          380-387            -                1  
  156.     #1            3          380-387            -                1  
  157.     #2            4          380-387            -                1  
  158.     #3            5          380-387            _                1
  159.  
  160.  
  161. Orchid / Santa Clara
  162. / AST PCnet
  163.     #0            2          380-387            -                1  
  164.     #1            3          380-387            -                1  
  165.     #2            4          380-387            -                1  
  166.     #3            5          380-387            -                1
  167.  
  168. Proteon ProNET with
  169. Checksum
  170.     #0            2          300-307            -                -  
  171.     #1            3          300-307            -                -  
  172.     #2            2          308-30F            -                -  
  173.     #3            3          308-30F            -                -  
  174.     #4            4          310-317            -                -  
  175.     #5            2          340-347            -                -
  176.  
  177. Corvus Omninet
  178.     #0            -          248-24F            -                -  
  179.     #1            -          258-25F            -                -  
  180.     #2            -          240-247            -                -  
  181.     #3            -          250-257            -                -        
  182.  
  183. 3Com 3C505 EtherLink Plus
  184.     #0            2          300-307            -                5  
  185.     #1            3          310-317            -                6  
  186.     #2            4          320-327            -                7  
  187.     #3            3          300-307            -                1  
  188.     #4            4          310-317            -                3  
  189.  
  190.     DEVICE        INT        I/O DECODE (h)     MEM DECODE       DMA
  191.  
  192. 3Com EtherLink
  193.     #0            3          300-30F            -                -  
  194.     #1            5          300-30F            -                -  
  195.     #2            3          310-31F            -                -  
  196.     #3            5          310-31F            -                -
  197.  
  198. Gateway G-Net
  199.     #0            -          2E0-2EF            D000:0000-FFFE   -  
  200.     #1            -          300-31F            C000:0000-FFFE   -  
  201.     #2            -          2A0-2BF            E000:0000-FFFE   -(3)
  202.  
  203. IBM PC Network
  204.     #0            2          360-363            -                3(2)
  205.     #1            3          368-36B            -                3(2)
  206.     #2            3          360-363            -                3(2)
  207.     #3            2          368-36B            -                3(2)
  208.  
  209. AT&T StarLAN
  210.     #0            2          360-367            C000:0000-1FFF    -
  211.     #1            2          368-36F            C000:0000-1FFF    -  
  212.     #2            3          360-367            D000:0000-1FFF    -  
  213.     #3            3          368-36F            D000:0000-1FFF    -  
  214.     #4            4          368-36F            D000:0000-1FFF    -
  215.     #5            4          360-367            E000:0000-1FFF    -(3)
  216.  
  217. IBM PC Cluster    
  218.     #0            3          790-793            D000:0000-7FFF     -
  219.     #1            7          B90-B93            -                  -
  220.     #2            7          1390-1393          -                  -
  221.     #3            7          2390-2393          -                  -
  222.  
  223. IBM ASYNC Remote
  224. Dial In Line    
  225.     #0            4          3F8-3FF            -                  -  
  226.     #1            3          2F8-2FF            -                  -
  227.  
  228. IBM Token Ring
  229.     #0            2          A20-A23            CC00:0000-1FFF     -
  230.                                                 D800:0000-3FFF
  231.     #1            3          A24-A27            CE00:0000-1FFF     -
  232.                                                 D400:0000-3FFF
  233.     #2            6          A20-A23            A400:0000-1FFF     -
  234.                                                 A000:0000-3FFF
  235.     #3            7          A24-A27            C400:0000-1FFF     -
  236.                                                 C000:0000-3FFF
  237.  
  238. DEVICE            INT        I/O DECODE (h)     MEM DECODE        DMA
  239.  
  240. NetWorth Engineering    
  241. - vLAN V2.1
  242.     #0            2        380-384            -                1  
  243.     #1            5        380-384            -                1  
  244.     #2            3        380-384            -                1  
  245.     #3            2        280-284            -                3  
  246.     #4            5        280-284            -                3  
  247.     #5            3        280-284            -                3    
  248.  
  249. Novell Star Intelligent NIC
  250.  
  251.     #0            -        2B8-2B9            D000:0000-07FF        -  
  252.     #1            -        358-359            D400:0000-07FF        -  
  253.     #2            -        35C-35D            D800:0000-07FF        -  
  254.     #3            -        2BC-2BD            DC00:0000-07FF        -
  255.  
  256. Novell Standard NIC    2        2B8-2BB            D000:0000-07FF        -
  257. (810-86-001)-
  258.  
  259. Micom-Interlan N15010 Ethernet
  260.     #0            3        300-31F            -                -  
  261.     #1            5        300-31F            -                -  
  262.     #2            3        320-33F            -                -  
  263.     #3            5        320-33F            -                -
  264.  
  265. Ungermann-Bass Net/One Personal Connection
  266.     #0            -        360-367            C000:0000-0FFF        -  
  267.     #1            -        360-367            D000:0000-0FFF        -  
  268.     #2            -        360-367            E000:0000-0FFF        -3  
  269.     #3            -        368-36F            C000:0000-0FFF        -  
  270.     #4            -        368-36F            D000:0000-0FFF        -  
  271.     #5            -        368-36F            E000:0000-0FFF        -3
  272.  
  273.  
  274.     DEVICE        INT      I/O DECODE (h)      MEM DECODE         DMA
  275.  
  276. Torus Ethernet
  277.     #0            2        300-31F            D000:0000-7FFF       -  
  278.     #1            3        300-31F            D000:0000-7FFF       -  
  279.     #2            4        320-33F            D000:0000-7FFF       -  
  280.     #3            5        320-33F            D000:0000-7FFF       -  
  281.     #4            2        320-33F            D800:0000-7FFF       -  
  282.     #5            3        320-33F            D800:0000-7FFF       -  
  283.     #6            4        300-31F            D800:0000-7FFF       -  
  284.     #7            5        300-31F            D800:0000-7FFF       -  
  285.     #8            2        300-31F            C000:0000-7FFF       -  
  286.     #9            3        320-33F            C000:0000-7FFF       -  
  287.     #10           4        300-31F            C000:0000-7FFF       -  
  288.     #11           5        320-33F            C000:0000-7FFF       -  
  289.     #12           2        320-33F            C800:0000-7FFF       -  
  290.     #13           3        300-31F            C800:0000-7FFF       -
  291.     #14           4        320-33F            C800:0000-7FFF       - 
  292.     #15           5        300-31F            C800:0000-7FFF       - 
  293.     #16           -        368-36F            E000:0000-0FFF       -3
  294.  
  295. 1  Network Interface Cards in the file server and Network Printers
  296. may share the same interrupt in the File Server.  Network Interface
  297. Cards cannot share interrupts with each other or with devices other
  298. than the Network Printers in the File Server.
  299.  
  300. 2  Some of the Network Interface Card Device Drivers have been
  301. written to allow two cards to share the same DMA channel.  Those
  302. drivers will reference this footnote.
  303.  
  304. 3  All reference to memory E000:0000 can not be used in any 286 file
  305. server.
  306. /for