VME-CAN4 addresses
==================

Note that the following text only shows the *default* configuration of the
VME-CAN4 cards. If you use ``vcanDrvp`` or ``vcanDrvpar`` instead of
``vcanDrv`` to initialize the driver you can change the start of the VME-A24
address ranges and the interrupt ranges. Note that you cannot map the card at
an *arbitrary* VME-A24 address, see file "vcard.h" for further details. Note
too that the VME-A16 address range cannot be changed without modifying the card
(changing resistors) and modifying the driver's source.

Card numbers
------------

There are 4 possible card configurations, named 0 to 3 in this document. In
a VME system each card *must have* a different configuration. 

Interrupts
----------

The VME-CAN4 card uses VME interrupt level 2. Here are the used interrupts:

=============   ===============
configuration   interrupts used
=============   ===============
     0             112-119
     1             120-127
     2             128-135
     3             136-141
=============   ===============

VME Addresses
-------------

Depending on the configuration a card occupies different areas in VME
address space. 

Here are the used addresses in VME-A16 address space:

=============   ================================
configuration   VME addresses used (hexadecimal)
=============   ================================
     0               E000 - E0FF
     1               E100 - E1FF
     2               E200 - E2FF
     3               E300 - E3FF
=============   ================================

Here are the used addresses in VME-A24 address space:

=============   ================================
configuration   VME addresses used (hexadecimal)
=============   ================================
     0               800000 - 87FFFF
     1               A00000 - A7FFFF
     2               C00000 - C7FFFF
     3               E00000 - E7FFFF
=============   ================================