Card Inventory  vs  Power Supply Vcc not too much less than Vdd
  -------------------------------------------------------------------

                                               Original Rev.  19-JUN-1998
                                            Most Recent Rev.  25-JUN-1998



When used with a power supply that keeps Vcc at least as positive
as a Schottky drop under Vdd.


Cards that make no heat on the   74 FCT 164245 T   and on which you
can see the JTag 8990 registers.

      SM 52    this card has never been used with a power supply
               that does not control Vcc wrt Vdd.  No heat and
               can read/write to the 8990

    AONM 01    No Heat and can see the 8990
    AONM 30    No Heat and can see the 8990

      SM 50    No Heat and can see the 8990

     TRM 02    No Heat but writing $ffff to a reg reads back $f7ff



Card that have a   74 FCT 164245 T   that get hot even when used
with a power supply that controls Vcc wrt Vdd.

       AONM            SM              TRM               FM
      ------         ------           ------           ------
         3             45                1
         4             46                3
         5             47                4
         8             48                5
         9             49                6
        10             51                7
        11                               8
                                        14


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How to Read/Write to Registers on the 8990 JTag Controller

  1. Set the JTag Scan Path Controller ACTIVE.  This is done
     via the Card CSR Menu.

  2. Use Chip_Address 18 and any of the Register Addresses
     9, 12, 13, 14, 15.


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What it is like to Read/Write to Registers on the 8990 JTag
Controller of a Card that has HOT 74FCT164245T even though it
is running from a power supply that keeps VCC at least as
positive as one Schottky drop below Vdd.

  No matter what you try to write to a register in the 8990
  it reads back as $FFFF.  Is the write broken, or the read
  back broken or both ?   What keeps the HOT latched up
  74FCT164245T from sitting on the On Card Bus ?


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Cards that have their   74 FCT 164245 T   Pulled Off:      Rev. 20-JUN-1998

       AONM            SM              TRM               FM
      ------         ------           ------           ------
         3             45                1
         4             46                2
         5             47                3
         8             48                4
         9             49                5
        10             51                6
        11                               7
                                         8
                                        14


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   25-JUN-1998
   Information about the voltage drop across the Schottky Diodes
   that clamp Vcc to Vdd is now in the file:

   [.hardware.general]  CHARACTERIZATION_OF_RUN_II_COMPONENTS.TXT