The maximum number of VCs that can be configured for Series 300/400
machines with a DIO backplane is 32/card.  If a packet size of 256 bytes is
configured, the maximum number of VCs is 16/card.  If the fast select
facility is enabled, the maximum number of VCs is 16/card.
 
The maximum number of VCs that can be configured for Series 800 machines
with a CIO (Mid-Bus) backplane is 64/card.  The maximum number of VCs that
can be configured for Series 800 machines with an NIO backplane is 256/card.
 
The maximum number of VCs that can be configured for Series 700 machines
with an EISA backplane is 256/card.
 
The maximum numbers of VCs that is supported on a system (whatever the number
of cards) is 1024 VCs/spu.
 
The actual number of VCs that can be configured for a particular interface
depends on the packet size, frame size and level 2 window size setting.
 
 
MAXIMUM VCs FOR Mid-Bus PSI (CIO) all versions HP-UX and Precision-Bus PSI
for HP-UX versions prior to 8.0 :
 
 
                       LEVEL 3 Packet SIZE
             _____________________________________________________________
LEVEL 2    |   16    32    64    128    256    512    1024    2048    4096
WINDOW     |______________________________________________________________
SIZE       |
          1|   64    64    64     64     56     28      14       7       3
          2|   64    64    64     64     55     28      13       6       2
          3|   64    64    64     64     55     27      12       5       1
          4|   64    64    64     64     54     26      12       5       1
          5|   64    64    64     64     53     26      11       4       0
          6|   64    64    64     64     53     25      10       3       0
          7|   64    64    64     64     52     24      10       3       0
 
 
 
MAXIMUM VCs for Precision-Bus PSI (NIO) and EISA bus for HP-UX 8.0 and later:
 
                        LEVEL 3 PACKET SIZE
           _____________________________________________________________
LEVEL 2  | 16    32    64    128    256    512    1024    2048    4096
WINDOW   |______________________________________________________________
SIZE   1 |256   256   256    256    256    236     120      64      32
       2 |256   256   256    256    256    236     119      63      32
       3 |256   256   256    256    256    235     119      63      31
       4 |256   256   256    256    256    235     118      62      31
       5 |256   256   256    256    256    234     117      61      30
       6 |256   256   256    256    256    233     117      61      29
       7 |256   256   256    256    256    233     116      60      29 