User`s manual

ENV - Set Environment
3-55
3
3. Determine any necessary VMEbus translation offset. The
offset value is added to the VMEbus address to create the PCI
bus address.
4. Determine the necessary VMEbus slave image control. The
value used for slave image control is made up of several bit
fields which specify how reads and writes will be processed
by the Universe device. The desired value can be determined
by progressively ORing together the selected bit fields
described below.
To select the type of PCI address space that will respond in
the defined VMEbus window, use the following:
0x00000000 for PCI Memory space, zero no bits are set.
0x00000001 for PCI I/O space.
0x00000002 for PCI Configuration space.
To lock PCI transactions resulting from VMEbus Read-
Modify-Writes, OR the following value with that chosen
above: 0x00000040
To enable 64-bit PCI transactions, OR the following value
with those chosen above: 0x00000080
To select the VMEbus address space accesses to decode, OR
the value defined here with those chosen above:
0x00000000 for A16 space, zero no bits are set.
0x00010000 for A24 space.
0x00020000 for A32 space.
To select the mode of VMEbus accesses to decode, OR the
value defined here with those chosen above:
0x00100000 for non-privileged.
0x00200000 for supervisor.
0x00300000 for both non-privileged and supervisor, two bits
set.
To select the type of VMEbus accesses to decode, OR the
value defined here with those chosen above:
0x00400000 for data.
0x00800000 for program.
0x00C00000 for both data and program, two bits are set.